Patent Publication Number: US-9853748-B2

Title: Systems and methods for controlling radio transmit power for information handling systems based on system-specific RF parameters

Description:
FIELD OF THE INVENTION 
     This invention relates generally to portable information handling systems and, more particularly, to radio power control for wireless transmission from information handling systems. 
     BACKGROUND 
     As the value and use of information continues to increase, individuals and businesses seek additional ways to process and store information. One option available to users is information handling systems. An information handling system generally processes, compiles, stores, and/or communicates information or data for business, personal, or other purposes thereby allowing users to take advantage of the value of the information. Because technology and information handling needs and requirements vary between different users or applications, information handling systems may also vary regarding what information is handled, how the information is handled, how much information is processed, stored, or communicated, and how quickly and efficiently the information may be processed, stored, or communicated. The variations in information handling systems allow for information handling systems to be general or configured for a specific user or specific use such as financial transaction processing, airline reservations, enterprise data storage, or global communications. In addition, information handling systems may include a variety of hardware and software components that may be configured to process, store, and communicate information and may include one or more computer systems, data storage systems, and networking systems. 
     The conventional technique for configuring a Wi-Fi wireless radio module for assembly into mobile information handling systems (such as notebook and tablet computer devices) that have different system configurations employs conservative generic radio module operating parameter values that are set within the radio module and that are based on generic system level RF parameter value assumptions. These same conventional radio module operating parameters are then generically applied to all different system configurations, irrespective of the individual RF characteristics of the information handling system platform into which the radio module is being installed. The result is a radio or wireless-enabled computer system that is not optimized for best wireless performance when the computer leaves the factory. For conventional portable computer systems that need to meet bystander specific absorption rate (SAR) requirements, a separate SAR stock keeping unit (SKU) for Wi-Fi needs to be set up, configured and managed. This SAR-compliance process adds cost, complexity, schedule impact and increased time to market risk, especially when considering added complexity of solder-down and connectorized module form-factor variants across system types. Furthermore, the conventional technique for achieving SAR-compliance for assembled computers results in a reduction in wireless performance since a fixed SAR power reduction is applied across all system configurations accepting the Wi-Fi SAR SKU radio module. 
       FIG. 1  illustrates conventional methodology  100  for manufacturing, configuring and assembling a Wi-Fi wireless radio module to a mobile information handling system. As shown, in step  102  of methodology  100  a given type of wireless radio module is configured during its production with default radio module operating parameters that are generic to all different configurations of mobile information handling systems (e.g., such as different system build configurations and antenna designs customized for the specific system configuration) into which the radio module may be installed. Such conventional radio module operating parameters include radio transmission power values defined in the transmit power calibration table of the radio module. Radio transmission power values may also include SAR power parameter/s that specify a reduced generic fixed radio frequency (RF) transmission power that is also applied irrespective of the specific type of information handling system configuration with which the radio module is assembled. In parallel step  104 , a given mobile information handling system platform (sans the radio module) is configured and built (e.g., built by an original design manufacturer “ODM”) to include system antennae/s. In step  106  of  FIG. 1 , the radio module is operatively mated (inserted) into the mobile information handling system platform build cell of step  104  and coupled to the system circuitry and antennae/s. This is followed by a system burn-in process  108 , during which the assembled mobile information handling system is powered on and the inserted radio module functionally tested in step  110  via wireless application protocol (WAP) to verify that the system antennae/s have been correctly fitted (coupled) to the radio module. Upon determination that the radio module and system antennas are correctly fitted, then the assembled system with radio module is shipped from the factory or assembly plant in step  112 . If in step  110  it is determined that the antenna and radio module are not correctly fitted and operative, then methodology  100  terminates in step  114 , and the assembled system is not shipped. 
     SUMMARY 
     Disclosed herein are systems and methods that may be implemented to optimize or otherwise control radio module transmit power performance from a given wireless-enabled information handling system platform based on a set of system-specific RF parameter values that are provisioned and stored on the information handling system platform (e.g., in non-volatile memory or other suitable system non-volatile storage device/s) and that uniquely apply to the specific RF characteristics (e.g., particular device environment, particular system chassis configuration, etc.) of the given information handling system. In one exemplary embodiment, the unique system-specific RF parameter values may be stored in a BIOS lookup table maintained on the system platform that may be queried by a processing device in the radio module. The radio module may then self-update (e.g., self-calibrate) its own radio module operating parameters (e.g., transmit power calibration table values) based on information contained in the queried unique system-specific RF parameter values. The disclosed systems and methods may be implemented in one exemplary embodiment to address the reduced performance of conventional Wi-Fi radio modules that are integrated into portable mobile information handling systems (e.g., such as notebook and tablet computer devices) by enabling improved wireless performance and data reach for such assembled systems as they leave or are shipped from an ODM manufacturing or assembly factory. 
     In one exemplary embodiment, system-specific RF parameter values may be provided as an Advanced Configuration and Power Interface (ACPI) antenna system object that is defined to correspond to the antenna peak gain for the information handling system platform configuration, and that is characterized for the system platform during its development. Such an “actual” peak gain value may be empirically measured, recorded and provisioned on the system platform (e.g., in system non-volatile memory or other suitable system non-volatile storage) at the factory or other assembly point, and then read by the radio module driver (e.g., such as calibration updater logic in the Wi-Fi driver) and used to update the power calibration tables of the radio module for more optimal and/or higher RF transmission output power. This procedure may occur, for example, during a factory configuration process for the information handling system and radio module as part of a factory burn-in stage for the information handling system. In one exemplary embodiment, calibration of the radio module power calibration tables may include: installing an ACPI table of the system-specific RF parameter values (e.g., including system RF parameters such as actual measured system antenna peak gain values) into the system UEFI BIOS, performance of secure authentication checking, loading of software drivers, and using the radio module driver (e.g., calibration updater logic of the Wi-Fi module driver) to read the system-specific RF parameter values from the ACPI table and to update the radio module operating parameter values (e.g., power calibration tables) based on these system-specific RF parameter values. 
     The disclosed systems and methods may be implemented in one exemplary embodiment to utilize unique system-specific RF parameter values that are based on unique system RF operating characteristics to configure a radio module to achieve improved system wireless performance when installed with a given information handling system platform configuration, and in a manner that is in contrast to conventional Wi-Fi radio module configuration techniques that involve defining a generic radio module SKU with default universal conservative power values for installation in all target information handling system platforms irrespective of the RF operating characteristics of the given system platform into which the radio module is being installed. The disclosed systems and methods may also be implemented in one embodiment without the other disadvantages that result from conventional radio module configuration techniques. These other disadvantages resulting from conventional Wi-Fi module configuration techniques include reduced wireless performance that occurs since a conservative SAR power back-off is conventionally applied across frequency bands, channels and radio operating modes of a given information handling system and therefore does not account for specifics of the individual information handling system platform product environment (e.g., such as individual antenna characteristic/s in the same and different frequencies). The disclosed systems and methods may also be implemented to avoid additional disadvantages that result from conventional Wi-Fi module configuration techniques such as reduced system battery life that results due to the system radio transmit chain and power amplifier (PA) being operated at less than optimal RF chain and PA gain levels for the individual information handling system platform. 
     In one respect, disclosed herein is an information handling system platform, including: a host processing device; one or more antenna elements; system non-volatile storage containing system-specific radio frequency (RF) parameter values that represent one or more RF characteristics of the mobile information handling system platform; and at least one radio module configured to be coupled to the system non-volatile storage, host processing device and one or more of the antenna elements, the radio module including at least one processing device that is configured to process outgoing data provided from the host processing device to produce and transmit RF signals from one or more of the antenna elements based at least in part on one or more stored radio module operating parameter values. The processing device of the radio module may be further configured to access the system-specific radio frequency (RF) parameter values on the system non-volatile storage and update the stored radio module operating parameters based at least in part on information contained in the accessed system-specific RF parameter values. 
     In another respect, disclosed herein is a radio module configured for use with an information handling system platform that itself includes a host processing device, system storage and one or more antenna elements. The radio module may include at least one processing device that is configured to: process outgoing data provided from the host processing device to produce and transmit RF signals from one or more of the antenna elements based at least in part on one or more stored radio module operating parameter values; and access system-specific radio frequency (RF) parameter values stored on the system storage and update the stored radio module operating parameters based at least in part on information contained in the accessed system-specific RF parameter values. 
     In another respect, disclosed herein is a method of configuring an information handling system platform that includes a host processing device, non-volatile system storage and one or more antenna elements. The method may include: storing system-specific radio frequency (RF) parameter values in the system non-volatile storage, the system-specific radio frequency (RF) parameter values representing one or more RF characteristics of the mobile information handling system platform; coupling at least one radio module to the system non-volatile storage, host processing device and one or more of the antenna elements, the radio module including at least one processing device that is configured to process outgoing data provided from the host processing device to produce and transmit RF signals from one or more of the antenna elements based at least in part on one or more stored radio module operating parameter values; and using the processing device of the radio module to access the system-specific radio frequency (RF) parameter values on the system non-volatile storage and update the stored radio module operating parameters based at least in part on information contained in the accessed system-specific RF parameter values. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         FIG. 1  illustrates conventional methodology or manufacturing, configuring and assembling a Wi-Fi wireless radio module to a mobile information handling system. 
         FIG. 2  illustrates a block diagram of an information handling system according to one exemplary embodiment of the disclosed systems and methods. 
         FIG. 3  illustrates a block diagram of a radio module according to one exemplary embodiment of the disclosed systems and methods. 
         FIG. 4  illustrates high level firmware and software architecture according to one exemplary embodiment of the disclosed systems and methods. 
         FIG. 5  illustrates methodology for manufacturing, configuring and assembling a wireless radio module to other components of a mobile information handling system platform according one exemplary embodiment of the disclosed systems and methods. 
         FIG. 6  illustrates methodology for manufacturing, configuring and assembling a wireless radio module to other components of a mobile information handling system platform according one exemplary embodiment of the disclosed systems and methods. 
     
    
    
     DESCRIPTION OF ILLUSTRATIVE EMBODIMENTS 
       FIG. 2  is a block diagram of an information handling system  200  (e.g., mobile portable information handling system such as notebook computer, MP3 player, personal data assistant (PDA), cell phone, smart phone, cordless phone, tablet computer, etc.) as it may be configured according to one exemplary embodiment of the disclosed systems and methods. As shown in  FIG. 2 , information handling system  200  of this exemplary embodiment includes a host processing device  205  (e.g., such as an Intel Pentium series processor, an Advanced Micro Devices (AMD) processor or one of many other processors currently available) which may be optionally coupled together with a platform controller hub (PCH)  206  for some applications. Host processing device  205  may be configured execute an operating system (OS) such as Windows-based operating system, Linux-based operating system, etc. System memory  215  (e.g., DRAM) and a display controller  220  may be coupled as shown to host processing device  205 , and a display device  225  (e.g., video monitor) may be coupled to display controller  220  to provide visual images (e.g., via graphical user interface) to the user, e.g., via eDP components  219  such as eDP cable and eDP connector. Media drives  235  may be coupled as shown to host processing device  205  via PCH  206  to provide permanent storage for the information handling system. 
     Still referring to  FIG. 2 , an optional expansion bus  240  may be coupled to PCH  206  to provide the information handling system with additional plug-in functionality. Expansion bus  240  may be a PCI bus, PCI Express bus, SATA bus, USB or virtually any other expansion bus. Input devices  245  such as a keyboard and mouse may be coupled via PCH  206  to host processing device  205  to enable the user to interact with the information handling system. A wireless radio module  280  may be coupled to host processing device  205  via PCH  206 , and one or more antenna elements (e.g., such as multiple MIMO antenna elements  282   1  to  282   N ) may in turn be coupled to radio module  280  as shown. An embedded controller (EC)  270  may also be coupled to PCH  206  as shown, and may be configured to perform various tasks such as battery and power management, I/O control, etc. Persistent non-volatile memory storage  211  (e.g., embedded and partitioned flash memory, Electrically Erasable Programmable Read Only Memory—EEPROM, etc.) may be coupled to EC  270  for storing persistent information for EC  270  and other system information, e.g., including Unified Extensible Firmware Interface (UEFI) firmware  215 ; Advanced Configuration and Power Interface (ACPI) information  217  that may include system-specific RF parameters, tables and runtime environment; as well as other information such as system basic input/output system (BIOS) firmware (e.g., in the form of system management SMBIOS data), etc. It will be understood that other embodiments, non-volatile memory or other non-volatile storage device/s (e.g., such as hard disk drive and/or optical drive, etc.) may also or alternatively be provided elsewhere in system  200  for storing such information, e.g., such as media drives  235 . 
     In the particular embodiment of  FIG. 2 , information handling system  200  is coupled to an external source of power, namely AC mains  250  through AC adapter  255 . It will be understood that external power may be alternatively provided from any other suitable external source (e.g., external DC power source) or that AC adapter  255  may alternatively be integrated within an information handling system  200  such that AC mains  250  supplies AC power directly to information handling system  200 . As shown AC adapter  255  is removably coupled to, and separable from, battery charger/power circuit  260  of information handling system  200  at mating interconnection terminals  290  and  292  in order to provide information handling system  200  with a source of DC power to supplement DC power provided by battery cells of a battery system in the form of smart battery pack  265 , e.g., lithium ion (“Li-ion”) or nickel metal hydride (“NiMH”) battery pack including one or more rechargeable batteries and a BMU that includes an analog front end (“AFE”) and microcontroller. Further, a battery system data bus (SMBus)  281  is coupled to smart battery pack  265  to provide battery state information, such as battery voltage and current information, from BMU  266  of smart battery pack  265  to EC  270  and to other components such as processor  205 . Battery charger/power circuit  260  of information handling system  200  may also provide DC power for recharging battery cells of the battery system  265  during charging operations. 
     When a battery system of a portable information handling system is optionally provided as a replaceable battery pack, it may be configured for insertion and removal from a corresponding battery pack compartment defined within the chassis of the information handling system (e.g., such as a notebook computer), and may be provided with external power and data connector terminals for contacting and making interconnection with mating power connector terminals and data connector terminals provided within the battery pack compartment to provide power to the system load (i.e., power-consuming components) of the information handling system and to exchange data with one or more processing devices of the information handling system. 
       FIG. 3  illustrates a block diagram of one exemplary embodiment of a radio module  280  as it may be installed and coupled to multiple antenna elements  282   1  to  282   N  (e.g., MIMO antenna elements) of an information handling system  200 . In this embodiment, radio module  280  may be configured to self-update its radio module operating parameter values  399  (e.g., transmit power calibration table values) according to system-specific RF parameter values that are stored in, and read from, other components of an information handling system platform  200  (e.g., such as non-volatile memory components  211  of  FIG. 2  or other suitable non-volatile storage component/s). Such stored system-specific RF parameter values may be empirically measured for the given system platform  200  and therefore uniquely represent the specific RF characteristics (e.g., resulting from particular system device environment, particular system chassis configuration, etc.) of the given information handling system platform  200  into which radio module  280  has been installed during system assembly. 
     Still referring to  FIG. 3 , radio module  280  includes a single Wi-Fi (e.g., 802.11-based wireless local area network “WLAN”) baseband processing device  390  coupled to multiple antenna elements  282 , although it will be understood that the disclosed systems and methods may be alternatively implemented with two or more baseband processing devices that are coupled to one or more antenna elements. Moreover, it will be understood that Wi-Fi represents an exemplary RF communication technology only, and that radio modules capable of any one or more RF communication technologies (e.g., including Bluetooth) may be employed using the disclosed systems and methods. In this embodiment, components of radio module  280  may be provided as an expansion card on a printed circuit board (PCB) with a suitable connector (e.g., such as M.2 edge connector)  398  that provides interconnection for radio module  280  to power circuit  260 , as well as to PCH  206  and host processing device  205 , via a mating edge connector. In this embodiment Wi-Fi baseband processing device communicates with host processing device  205  via PCI Express (PCI-e) data bus, although any other suitable data communication interface (e.g., such as USB) between radio module/s and host processing device/s may be employed. 
     Also shown in  FIG. 3  are RF transceiver front ends  394   1  to  394   N  that are coupled between 802.11-based Wi-Fi baseband processing device  390  and respective antenna elements  282   1  to  282   N . Each of RF transceiver front ends  394   1  to  394   N  exchange 2.4 GHz (e.g., Wi-Fi 802.11ac and 802.n) and 5 GHz Wi-Fi (e.g., 802.11ac and 802.11n) transmit and receive signals with Wi-Fi baseband processing device  390  as shown. Each of radio transceiver front ends  394  may be configured to perform intermediate frequency (IF) to RF up conversion mixing, amplification and RF processing tasks for outgoing transmitted signals to antennas  282 , and vice-versa (including down conversion) for incoming received signals from antennas  282 . Besides IF, each transceiver front end  394  may perform up conversion and down conversion between RF and other suitable frequencies for processing by baseband processing device  390 , e.g., such as zero-IF frequency, baseband frequency, etc. In this regard, baseband processing device  390  (e.g., digital signal processor “DSP” or other suitable RF module or processing device/s) may be coupled to exchange outgoing and incoming IF or other suitable signals with transceiver front end  394  through respective digital-to-analog (DAC) and analog-to-digital (ADC) converters (not shown). Baseband processing device  390  may be configured to manage RF signal transmission and reception, as well as to perform tasks including signal processing, encoding, frequency shifting and/or modulation operations to provide transmitted information in outgoing signals based on digital data provided by host processing device  205 , and to perform signal processing, decoding, frequency shifting and/or demodulation operations to obtain the message content in the incoming signals as digital data to provide to host processing device  205 . 
     As further shown in  FIG. 3 , baseband processing device  390  may also be configured to execute or otherwise implement calibration updater logic  395  (e.g., as part of a radio module driver) to self-update (e.g., self-calibrate) its transmit power calibration information (e.g., power calibration table values) according to system-specific RF parameter values that are stored in, and read from, other components of a given information handling system platform  200  across connector  398 . In this regard, it will be understood that the same configuration of radio module  280  may be installed in information handling system platforms having different chassis configurations that each have different RF characteristics, such as result from different system device environment, different system chassis configuration, etc. For example, a particular platform chassis configuration of a given information handling system may affect individual system RF characteristics (e.g., such as peak antenna transmit gain and/or SAR characteristics) due to the location, type, number and/or spacing of transmit antenna elements as they are mounted relative to the system chassis which includes the outer shell or cover (e.g., lid and base of a notebook computer) as well as the inner frame of the platform to which system components may be mounted. Other chassis configuration aspects that may affect individual system RF characteristics include, but are not limited to, lengths and/or routing paths of RF coaxial cables which may vary depending on the configuration of the system components. Yet other chassis configuration aspects that may affect individual system RF characteristics include, but are not limited to the external chassis material (e.g., plastic outer shell versus metal outer shell), size and/or shape of outer footprint of the information handling system chasses, etc. Examples of different types of system device environments that may result in different individual system RF characteristics include, but are not limited to, read device usage environment and/or device usage modes of operation. In this regard, the different usages may have different antenna/RF performance specifications with different RF system parameter values. System RF characteristics may also vary with changes in the noise floor of the system, depending on the noise-level contribution of the system configuration components. 
       FIG. 4  illustrates high level firmware and software architecture  400  as it may be maintained in non-volatile storage of an information handling system platform, e.g., such as in non-volatile memory  211  and/or media drives  235  of information handling system  200  of  FIG. 2 . In  FIG. 4 , platform hardware  412  may be hardware components of information handling system  200  of  FIG. 2 . Other components of architecture  400  may be implemented in one embodiment as software that is stored in non-volatile memory (e.g., flash memory, Electrically Erasable Programmable Read Only Memory—EEPROM, etc.) or in other non-volatile storage such as media drives  235 . As illustrated in  FIG. 4 , architecture  400  may include EFI system partition  414  that includes EFI loader  416  that is maintained on system hardware  412  which may include non-volatile memory  211  in  FIG. 2 . As shown, architecture  400  includes EFI boot services  408  and EFI runtime services  410 , as well as EFI operating system (OS) loader  406  and operating system  404  that may be loaded and executed, e.g., by host processing device  205 . Architecture  400  also includes ACPI interface  403  that itself includes ACPI tables  402  which in turn include system-specific RF parameter values  217  (e.g., actual measured system antenna peak gain). Other components that may also be present in architecture  400  are system management BIOS interface  405 . In the embodiment of  FIG. 2 , software and firmware components of architecture  400  may be accessed and executed by host processing device  205  and/or radio module  280 . In particular, host processing device  205  may access and execute components  408 ,  410 ,  406  and  404 ; while radio module  280  may access and utilize system RF parameter values  217  in a manner as described elsewhere herein. 
       FIGS. 5 and 6  together illustrate an exemplary embodiment of methodology for manufacturing, configuring and assembling a wireless radio module to other components of a mobile information handling system platform according to one exemplary embodiment of the disclosed systems and methods. Note that for illustration purposes, steps of  FIGS. 5 and 6  are described herein in relation to information handling system  200  and radio module  280  of  FIGS. 2 and 3 . However, it will be understood that similar methodology may be implemented with other information handling system and/or radio module configurations. 
     In one embodiment, the methodology of  FIGS. 5 and 6  may be performed to factory pre-configure a wireless information handling system platform  200  for “out-of-the-box” wireless connectivity service, e.g., in response to an order  602  received via sales  603  from a customer  604  as shown in  FIG. 6 . In one embodiment, a given order  602  may specify or define a combination of different information handling system components and/or component types that are selected ala carte for assembly by a customer  604  or other type of user. Examples of such information handling system components include, but are not limited to, different wireless radio module frequency/protocol capability and combinations of these capabilities (e.g., Wi-Fi, Bluetooth, wireless wide area network “WWAN”, etc.), different number of antennas  282 , different material and style of notebook or tablet computer chassis, etc. In this regard, each different defined combination of different information handling system components and/or component types may result in a given configuration of an information handling system  200  that has different unique system RF operating characteristics, such as unique antenna peak gain characteristics, etc. 
     Referring now to  FIG. 5 , in step  502  of methodology  500  a given type of wireless radio module  280  is configured during its production (e.g., by wireless module vendor  606  shown in  FIG. 6 ) with default radio module operating parameters  399  that are generic to all different configurations of mobile information handling systems  200  (e.g., such as different system build configurations and/or antenna designs customized for the specific system configuration) into which the radio module  280  may be installed. Examples of such conventional radio module operating parameters include radio transmission power values defined in the transmit power calibration table of the radio module that are to be used to limit the power transmission levels of the radio module  280 . Radio transmission power values may include SAR power parameter/s that specify a generic fixed radio frequency (RF) transmission power reduction for any type of information handling system configuration with which the radio module is assembled. 
     In parallel step  504 , a given mobile information handling system platform  200  (sans the radio module) is configured and built (e.g., built by an original design manufacturer “ODM” or other type manufacturer in assembly factory  608 ) to include system antennae/s  282 . In step  506  of  FIG. 5 , an inbound radio module  280  is pulled into the assembly factory  608 , e.g., via one or more hubs  607  as illustrated in  FIG. 6 . In assembly factory  608 , inbound radio module  280  may be married with and operatively mated (inserted) using connector  398  into a mating connector of the build cell of mobile information handling system platform  200  of step  504 . In this step, radio module  280  is coupled to the system circuitry, including host processing device  205 , system non-volatile memory  211 , and antennae/s  282  of system  200 . 
     Still referring to  FIGS. 5 and 6 , a system burn-in process  508  may be next performed during which the assembled mobile information handling system  200  is powered on and the inserted radio module  280  functionally tested via wireless application protocol (WAP) to verify that the system antennae/s  282  have been correctly fitted (coupled) to the radio module  280 . Also during burn-process  508 , system-specific RF parameter values  217  may be retrieved by the baseband processing device of the radio module and used to update its own radio module operating parameters  399  maintained in internal (e.g., integrated) non-volatile storage  397  of radio module  280  that is coupled internally to processing device  390 , or in other non-volatile storage coupled externally to the baseband processing device. In this regard, radio module operating parameters  399  may be stored, for example, in non-volatile memory (e.g., flash memory, Electrically Erasable Programmable Read Only Memory—EEPROM, etc.) or in other non-volatile storage such as media drives  235 . It will also be understood that in other embodiments system-specific RF parameter values  217  may be retrieved by or otherwise provided to a radio module  280  at any other suitable time other than during burn-in process  508 . 
     In one embodiment, system-specific RF parameter values  217  representing specific RF characteristics of an individual system platform may be empirically measured across the full RF transmit frequency range during the development process (e.g., all system RF parameters and performance may be fully characterized in the laboratory environment) for a particular configuration of information handling system platform  200  being built (e.g., a particular notebook computer design with particular number, location, spacing and/or types of antennas, a particular tablet computer design with particular number, location, spacing and/or types of antennas, etc.). Examples of such measured system RF parameter values include, but are not limited to, actual measured system antenna peak gain (e.g., 3 dBi), actual measured system antenna isolation (e.g., 22 dB), actual measured system radiation pattern (e.g., azimuth gain coverage), etc. 
     Specifically, burn-in process  508  of  FIGS. 5 and 6  may begin with step  510  where system-specific RF parameter values may be programmed (e.g., stored) into a pre-defined memory location  217  of non-volatile memory  211  (e.g., in a BIOS Flash lookup table as shown in  FIGS. 5 and 6 ) that is maintained on the system platform  200  and that may be queried by a processing device  390  in the radio module  280 . Then in step  512 , processing device  390  of radio module  280  may execute calibration updater  395  to access the system-specific RF parameter values in pre-defined memory location  217  of non-volatile memory  211 , and then update its radio module operating parameters  399  (e.g., radio module RF transmit power calibration table values) according to or based on the queried unique system-specific RF parameter/s  217 . In one exemplary embodiment, calibration updater  395  may be executed processing device  390  to perform step  512  by updating values of a RF transmit power table of radio module  280  based on the retrieved system-specific RF parameter values for optimized transmit performance from the given system platform  200 . In one exemplary embodiment, other components to enable out-of-the-box connectivity for a given platform configuration of system  200  may be optionally provided during step  508 , e.g., such as software and/or firmware  611  and/or access codes from wireless service provider  611 , certificate of authority  615 , etc. 
     Next, in step  514 , processing device  390  of radio module  280  may run a self-check and an internal PHY loopback to validate that the newly calibrated RF transmit power parameter values of the radio module RF transmit power table  399  are within acceptable worldwide (WW) regulatory limits, etc. In this regard, worldwide regulatory limits are made up of the supported country set of limits established by national regulatory authorities such as the FCC in the US, IC in Canada, MIC in Japan, KCC in South Korea, MII in China, etc. This is followed by step  516 , during which the assembled mobile information handling system  200  is powered on and the inserted radio module  280  functionally tested (e.g., via wireless application protocol (WAP)) to verify that the system antennae/s  282  have been correctly fitted (coupled) to the radio module. Upon determination that that the radio module  280  and system antennas  282  are correctly fitted, then the assembled system  200  with radio module  280  is shipped outbound from the factory or assembly plant in step  518 , e.g., to merge center  617  for packaging and shipping of the assembled system  200  to customer  604  as an end system having pre-configured wireless capability and ready for user wireless connectivity. However, if in step  516  it is determined that the antenna/s  282  and radio module  280  are not correctly fitted and operative, then methodology  500  terminates in step  514 , and the assembled system  200  is not shipped. 
     It will be understood that the particular exemplary illustrated steps and order of steps of methodology  500  are exemplary only, and that any other combination of additional, fewer and/or alternative steps or step order may be employed that is suitable to optimize or otherwise control radio module transmit power performance from a wireless-enabled information handling system platform based on one or more system-specific RF parameter values  217  (e.g., as a set of system-specific RF parameter values) that are provisioned and stored in the information handling system platform, and that uniquely represent RF characteristics of the platform (e.g., such as specific device environment, system chassis configuration, etc.). For example, it is possible that the RF system parameters  217  may be stored into system non-volatile memory  211  before step assembly of radio module  280  to system  200  in step  506 . It is also possible that radio module  280  may dynamically and in real time update its radio module operating parameters  399  at a time after system manufacture, e.g., such as when a radio module is operatively mated with an information handling system  200  by an end user such as customer  604 . 
     In one embodiment ACPI objects may be populated under all PCI root spaces of ACPI tree in a radio module vendor&#39;s reference code, so that system-specific RF parameters  217  may be placed under any slot. In such an embodiment, a radio module vendor  606  may add an additional object to be populated, and the calibration updater  395  of the radio driver of a radio module  280  may read the system-specific RF parameter object  217  (e.g., “peak gain modifier” for each of Antennas 1, 2 and 3 as specified below) during the radio module initialization process and based on the read parameters  217  configure output power for a particular frequency band (e.g., Wi-Fi) with antenna system gain to corresponding applicable (e.g., Wi-Fi) regulatory limits as shown below. 
     
       
         
           
               
               
             
               
                   
                   
               
             
            
               
                   
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                 { 
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                 // DWordConst 
               
               
                   
                 Package( ) 
                 // System Antenna Parameters 1 
               
            
           
           
               
               
            
               
                   
                 { 
               
            
           
           
               
               
               
            
               
                   
                 Antenna1, 
                 // Antenna 1 peak gain modifier 
               
               
                   
                 Antenna2, 
                 // Antenna 2 peak gain modifier 
               
               
                   
                 Antenna3 
                 // Antenna 3 peak gain modifier 
               
            
           
           
               
               
            
               
                   
                 }, 
               
            
           
           
               
               
            
               
                   
                 }) // End of ANT object 
               
               
                   
                   
               
            
           
         
       
     
     Table 1 below illustrates example improvement in RF transmit performance from an assembled information handling system  200  resulting from methodology  500  of  FIGS. 5 and 6 . 
     
       
         
           
               
               
             
               
                   
                 TABLE 1 
               
             
            
               
                   
                   
               
               
                   
                 Improved Transmit 
               
            
           
           
               
               
               
               
               
            
               
                   
                 Default Generic 
                   
                   
                 Power Levels 
               
               
                   
                 SAR SKU With 
                   
                   
                 (Default SAR SKU 
               
            
           
           
               
               
               
               
               
            
               
                   
                   
                 Reduced Power 
                 Actual 
                 values + 2 dBi 
               
               
                   
                 Default Generic 
                 (Based on 
                 Measured 
                 difference between 
               
               
                   
                 Worldwide SKU 
                 assumed 5 dBi 
                 Antenna peak 
                 generic and actual 
               
               
                   
                 (Based on assumed 
                 antenna peak 
                 Gain For the 
                 antenna peak gain 
               
               
                   
                 5 dBi antenna peak 
                 gain) 
                 Given System 
                 values) 
               
            
           
           
               
               
               
               
               
               
               
               
            
               
                   
                 gain) 
                 SISO 
                 SISO 
                 Ant 
                 Ant 
                 SISO 
                 SISO 
               
            
           
           
               
               
               
               
               
               
               
               
               
               
            
               
                   
                   
                 SISO 
                 SISO 
                 282 1   
                 282 2   
                 282 1   
                 282 2   
                 282 1   
                 282 2   
               
               
                 Center 
                 Center 
                 282 1   
                 282 2   
                 (FCC 
                 (FCC 
                 Peak 
                 Peak 
                 New 
                 New 
               
               
                 Frequency 
                 Channel 
                 (WW) 
                 (WW) 
                 SAR) 
                 SAR) 
                 Gain 
                 Gain 
                 Process 
                 Process 
               
               
                   
               
            
           
           
               
               
               
               
               
               
               
               
               
               
            
               
                 5610 
                 122ac80 
                 13.5 
                 13.5 
                 12 
                 12 
                 3 
                 3 
                 14 
                 14 
               
               
                 5690 
                 138ac80 
                 15 
                 15 
                 12 
                 12 
                 3 
                 3 
                 14 
                 14 
               
               
                 5775 
                 155ac80 
                 15 
                 15 
                 12 
                 12 
                 3 
                 3 
                 14 
                 14 
               
               
                   
               
            
           
         
       
     
     Table 1 illustrates the difference between default system transmit power levels for a given radio module and the resulting improved system transmit power levels that may be achieved using the methodology of  FIGS. 5 and 6 . Specifically, the first and second columns of Table 1 give the single-input-single-output (SISO) 5 GHz band channel power calibration values (e.g., generic worldwide SKU and generic Wi-Fi reduced power FCC SAR SKU values) initially programmed by a radio module vendor  606  into a given Wi-Fi radio module  280  as default radio module operating parameters  399  for two system antennas  282   1  and  282   2  at three different center frequencies. In this example, these default SKU values of Table 1 are based on the vendor of this radio module using an assumed fixed 5 dBi antenna peak gain value for the 5 GHz band when used with any mated configuration of an information handling system  200 . The 5 dBi antenna peak gain value may also be programmed in step  502  as default radio module operating parameters  399  of radio module  280  for later retrieval and use by calibration updater  395  as will be described below. It will be understood that the values of Table 1 are exemplary only, and that it is possible that the various transmit power levels and/or peak antenna gain values may be different for different antennas and/or different center frequencies. In this regard, different individual antennas  282  of an information handling system  200  may be custom tuned and different system-specific RF parameters  217  may be provided for each different antenna  282  such that the resulting update radio module operating parameters  399  may themselves result in optimized different transmit power level values for each different system antenna  282 . 
     In the example of Table 1, the actual antenna peak gain for the 5 GHz Wi-Fi band is empirically measured to be 3 dBi for a particular platform configuration of information handling system  200 , which is 2 dBi lower than the vendor-assumed value of 5 dBi. Thus, this actual 3 dBi measured system antenna peak gain may in step  510  be programmed (e.g., using burn-in test equipment) as system operating parameters  217  into non-volatile memory  211  of the given system  200 . Then, processing device  390  may execute the calibration updater  395  of mated radio module  280  in step  512  to access and read the 3 dBi actual antenna peak gain values  217  from system non-volatile memory  211  to determine the 2 dBi difference between the default generic assumed antenna peak gain of 5 dBi and the actual system antenna peak gain of 3 dBi. Processing device  390  may then execute the calibration updater  395  to update the SISO A and SISO B transmit levels by adding the determined 2 dBi difference in antenna peak gain to the generic Wi-Fi reduced power FCC SAR SKU values (12 dBi in this case) to arrive at a new optimized calibrated SAR-compliant transmit power level of 14 dBi for each antenna and center frequency as shown. This new updated SAR-compliant transmit power level of 14 dBi may then be used by radio module  280  (i.e., rather than the original default 12 dBi power level) for actual transmission power for the assembled system  200  when it is operated by an end user (e.g., customer  604 ). 
     Where FCC SAR values are not applicable to a given system, the WW SKU values may be similarly incremented by 2 dBi (e.g., to 15.5 and 17 dBi values). Thus, using the methodology of  FIGS. 5 and 6 , the Wi-Fi radio module transmit power for the 5 GHz Wi-Fi frequency band channels can be safely increased by 2 dB (i.e., the difference between the fixed 5 dBi antenna peak gain value used by the radio module vendor and the actual 3 dBi peak gain measured for the system  200  by the system designer or manufacturer), enabling better out-of-the-box wireless performance for the shipped device. It will also be understood that radio module operating parameters  399  may take any form suitable for varying the maximum transmit power of a radio module besides RF transmit power parameter values of a transmit power calibration table, and/or that system-specific RF parameter values may be of any form suitable for representing the actual RF transmission characteristics (e.g. antenna gain, isolation, radiation power, etc.) of a given system design. For example, in one alternative embodiment, system-specific RF parameter value/s  217  may be provided in the form of maximum transmit power value/s to be used for RF transmission from one or more antennas  282  of a given system  200 , and a radio module  280  may retrieve these maximum transmit power value/s from system non-volatile memory  211  and directly employ these maximum transmit power value/s for controlling RF transmission power from system antenna/s  282 . 
     It will also be understood that one or more of the tasks, functions, or methodologies described herein (e.g., including those described herein for components  205 ,  280 ,  270 ,  390 , etc.) may be implemented by circuitry and/or by a computer program of instructions (e.g., computer readable code such as firmware code or software code) embodied in a non-transitory tangible computer readable medium (e.g., optical disk, magnetic disk, non-volatile memory device, etc.), in which the computer program comprising instructions are configured when executed (e.g., executed on a processing device of an information handling system such as CPU, controller, microcontroller, processor, microprocessor, FPGA, ASIC, or other suitable processing device) to perform one or more steps of the methodologies disclosed herein. A computer program of instructions may be stored in or on the non-transitory computer-readable medium accessible by an information handling system for instructing the information handling system to execute the computer program of instructions. The computer program of instructions may include an ordered listing of executable instructions for implementing logical functions in the information handling system. The executable instructions may comprise a plurality of code segments operable to instruct the information handling system to perform the methodology disclosed herein. It will also be understood that one or more steps of the present methodologies may be employed in one or more code segments of the computer program. For example, a code segment executed by the information handling system may include one or more steps of the disclosed methodologies. 
     For purposes of this disclosure, an information handling system may include any instrumentality or aggregate of instrumentalities operable to compute, classify, process, transmit, receive, retrieve, originate, switch, store, display, manifest, detect, record, reproduce, handle, or utilize any form of information, intelligence, or data for business, scientific, control, entertainment, or other purposes. For example, an information handling system may be a personal computer, a PDA, a consumer electronic device, a network storage device, or any other suitable device and may vary in size, shape, performance, functionality, and price. The information handling system may include memory, one or more processing resources such as a central processing unit (CPU) or hardware or software control logic. Additional components of the information handling system may include one or more storage devices, one or more communications ports for communicating with external devices as well as various input and output (I/O) devices, such as a keyboard, a mouse, and a video display. The information handling system may also include one or more buses operable to transmit communications between the various hardware components. 
     While the invention may be adaptable to various modifications and alternative forms, specific embodiments have been shown by way of example and described herein. However, it should be understood that the invention is not intended to be limited to the particular forms disclosed. Rather, the invention is to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the invention as defined by the appended claims. Moreover, the different aspects of the disclosed systems and methods may be utilized in various combinations and/or independently. Thus the invention is not limited to only those combinations shown herein, but rather may include other combinations.