Patent Description:
Among current technologies, multi-mode multi-band terminal devices operating in a long term evolution (LTE) <NUM>-<NUM> band, such as B1/B2/B3/B4/B7/B30/B66/B39/B41 usually use chips of a Qualcomm MSM8998+WTR5975 platform. The platform can achieve a maximum of CAT16 <NUM> gigabits per second (Gbps) downlink data transmission rate through LTE downlink triple carrier multi-input multi-output (MIMO) technology with dual carrier <NUM>×<NUM> MIMO plus carrier <NUM>×<NUM> MIMO and a <NUM> quadrature amplitude modulation (QAM) encoding scheme. The platform chip, however, do not support information transmission in the B42 band and cannot meet the needs of information reception in a wider band. US patent publication No. <CIT> discloses a carrier aggregation diversity antenna module with integrated low noise amplifier (LNA) banks. When receiving a ultra high band signal a terminal from a secondary antenna, a switch connects its input terminal to a first output terminal to pass the ultra high band signal to a filter that filters this signal to output an ultra high band "B42" that is input to a multiplexing LNA. When transmitting a ultra high band signal, the switch connects its input terminal to a second output terminal to receive an ultra high band transmit signal that is passed to the secondary antenna.

Hence, improvement to current technologies is desired.

The application embodiment provides a mobile terminal and an implementation method for bandwidth extension to the LTE band B42 to support signal transmission on the B42 band.

A first aspect of the application provides a mobile terminal for bandwidth extension to the LTE band B42 comprising: an RF circuit configured to support LTE downlink three-carrier MIMO in a <NUM> to <NUM> band and a <NUM> to <NUM> LTE B42 band and a <NUM> QAM coding, wherein the LTE downlink three-carrier MIMO comprises dual carrier <NUM>×<NUM> MIMO plus single carrier <NUM>×<NUM> MIMO, a B42 transmitting path located on the RF circuit, and a receiving path located on the RF circuit.

The B42 transmitting path is connected to a primary antenna of the RF circuit, and the receiving path is connected to four antennas of the RF circuit.

The B42 transmitting path comprises: a B42 RF power amplifier (PA) and a B42 power coupler, which are connected to a transmission terminal of the primary antenna on the RF circuit.

The receiving path comprises: a B42 transceiving (TRX) filter and a diplexer that are connected to the four antennas of the RF circuit.

The receiving path comprises: a first receiving path connected to the primary antenna in the four antennas of the RF circuit, a second receiving path connected to a secondary antenna in the four antennas of the RF circuit, a third receiving path connected to a first MIMO antenna in the four antennas of the RF circuit, and a fourth receiving path connected to a second MIMO antenna in the four antennas of the RF circuit.

In some embodiments, the first receiving path includes:.

In some embodiments, the B42 power coupler is further connected to a second transceiving and RF switch, the second transceiving and RF switch, the B42 power coupler and the first diplexer form a coupling path configured to detect transmission.

In some embodiments, the second receiving path includes:
a second diplexer and a second B42 transceiving filter, which are mutually connected, the second diplexer and the second B42 transceiving filter are connected to a transmission terminal of a secondary antenna of the RF circuit.

In some embodiments, the third receiving path includes:
a mutually connected third diplexer and a third B42 transceiving filter, wherein the third diplexer and the third B42 transceiving filter are connected to a transmission terminal of the first MIMO antenna of the RF circuit.

In some embodiments, the fourth receiving path includes:
a mutually connected fourth diplexer and a fourth B42 transceiving filter, wherein the fourth diplexer and the fourth B42 transceiving filter are connected to a transmission terminal of the second MIMO antenna of the RF circuit.

In some embodiments, a signal of the B42 band output from the B42 RF power amplifier passes the B42 transceiving filter and the B42 power coupler, and is transmitted by the primary antenna; a signal of the B42 band received by the four antennas is divided by the diplexer, filtered by the B42 transceiving filter, and received by the RF circuit.

A second aspect of the application further provides a method for realizing a mobile terminal for bandwidth extension to the LTE band B42, comprising:.

In some embodiments, the receiving path comprises: a first receiving path connected to the primary antenna in the four antennas of the RF circuit, a second receiving path connected to a secondary antenna in the four antennas of the RF circuit, a third receiving path connected to a first MIMO antenna in the four antennas of the RF circuit, and a fourth receiving path connected to a second MIMO antenna in the four antennas of the RF circuit.

In some embodiments, the second receiving path includes:
a second diplexer and a second B42 transceiving filter, which are mutually connected, wherein the second diplexer and the second B42 transceiving filter are connected to a transmission terminal of a secondary antenna of the RF circuit.

The third receiving path comprises:
a mutually connected third diplexer and a third B42 transceiving filter, wherein the third diplexer and the third B42 transceiving filter are connected to a transmission terminal of the first MIMO antenna of the RF circuit;.

The fourth receiving path comprises:
a mutually connected fourth diplexer and a fourth B42 transceiving filter, wherein the fourth diplexer and the fourth B42 transceiving filter are connected to a transmission terminal of the second MIMO antenna of the RF circuit.

The application provides a mobile terminal for bandwidth extension to the LTE band B42 and an implementation method. The mobile terminal comprises: an RF circuit supporting LTE downlink three-carrier MIMO in a <NUM> to <NUM> band and a <NUM> to <NUM> LTE B42 band and a <NUM> QAM coding, wherein the LTE downlink three-carrier MIMO comprises dual carrier <NUM>×<NUM> MIMO plus single carrier <NUM>×<NUM> MIMO, a B42 transmitting (TX) path located on the RF circuit and a receiving path located on the RF circuit. The B42 transmitting path comprises a B42 RF power amplifier and a B42 power coupler, which are connected to a transmitting end of the primary antenna on the RF circuit. The receiving path comprises: a B42 transceiving filter and a diplexer, which are connected to the four antennas on the RF circuit, respectively. The mobile terminal provided in the application addresses the technical problem of a B42 capable receiving path using multiple antennas including MIMO antennas and supports signal transmission on the B42 band and facilitates information transmission.

The following is a clear and comprehensive description of the technical solutions in the embodiments of the application with reference to the drawings in the embodiments of the application. Obviously, the embodiments described are only part of the application, not for exhaustive illustration. Based on the embodiments of the application, other embodiments which may be easily obtained by those having ordinary skills in the art without paying additional creative effort fall within the scope of the application for protection.

The application is a further detailed in the following with reference to the accompanying drawings and embodiments for clarification and illustration of the purpose, technical scheme, and advantages of the application. It should be understood that the specific embodiments described herein are intended to interpret the application rather than limit the application.

The method provided in the application to extend bandwidth of the mobile terminal to the LTE B42 band is detailed in the following. According to the capabilities of the Qualcomm Snapdragon MSM8998 chip and WTR5975 platform and the device status in current industry, the downlink <NUM>*4MIMO design of the <NUM>-<NUM> band is verified by selecting the 3GPP-compliant <NUM>-<NUM> band B42. The mobile device supports the TD-LTE CAT16 standard using triple carrier aggregation with two carrier <NUM>*<NUM> MIMO in B42 band and a single carrier <NUM>*<NUM> MIMO in band B41, that is, CA_41A (<NUM>*<NUM> MIMO) - 42C (<NUM>*<NUM> MIMO). The present application is realized by adding a B42 supportive RF circuit to a <NUM> <NUM>-<NUM> multi-mode multi-band terminal with an antenna path being modified.

A first embodiment provided in the application is a mobile terminal for bandwidth extension to the LTE band B42. As shown in <FIG>, the mobile terminal <NUM> includes: an RF circuit <NUM> supporting LTE downlink three-carrier MIMO in a <NUM> to <NUM> band and a <NUM> to <NUM> LTE B42 band and a <NUM> QAM coding, wherein the LTE downlink three-carrier MIMO comprises dual carrier <NUM>×<NUM> MIMO plus single carrier <NUM>×<NUM> MIMO, a B42 transmitting (TX) path <NUM> located on the RF circuit and a receiving (RX) path <NUM> located on the RF circuit.

With cross reference to <FIG>, the B42 transmitting path <NUM> comprises a B42 RF power amplifier (PA) and a B42 power coupler, which are connected to a transmission terminal of a primary antenna on the RF circuit. The receiving path <NUM> comprises a B42 transceiving (TRX) filter and a diplexer, which are connected to the four antennas of the RF circuit.

The B42 transmitting path <NUM> is used to facilitate information transmission on the B42 band, and the receiving path on the four antennas is used to facilitate information receiving on the B42 band. With cross reference to <FIG>, in some embodiments, the B42 transmitting path <NUM> (B42 TX) is connected to the primary antenna of the RF circuit. The receiving path is located on the four antennas of the RF circuit. Specifically, the receiving path comprises a first receiving path (B42 RX0) connected to the primary antenna circuit of the RF circuit, and a second receiving path (B42 RX1) connected to a secondary antenna circuit of the RF circuit, a third receiving path (B42 RX2) connected to a first MIMO antenna circuit of the RF circuit, and a fourth receiving path (B42 RX3) connected to a second MIMO antenna circuit of the RF circuit.

A signal in the B42 band output from the B42 RF power amplifier, after passing through the B42 transceiving (TRX) filter and the B42 power coupler, is transmitted by the primary antenna. The signal in the B42 band is received on the four antennas, divided by the diplexer, and filtered by the B42 transceiving filter.

Specifically, the first receiving path (B42 RX0) comprises:
a first diplexer and the first B42 transceiving filter, which are connected to the transmission terminal of the primary antenna of the RF circuit. As shown in <FIG>, the first receiving path further includes the B42 power coupler and a first transceiving and RF switch.

The B42 power coupler is connected between the first diplexer and the first B42 transceiving filter, and the first transceiving and RF switch is connected between the first B42 transceiving filter and the B42 RF power amplifier.

In some embodiments, to obtain a better signal transmission and reception, the B42 power coupler is further connected with a second transceiving and RF switch. The second transceiving and RF switching switch, the B42 power coupler, and the first diplexer form a coupling path, which is used to detect transmission radiation.

In some embodiments, the second receiving path includes:
a mutually connected second diplexer and a second B42 transceiving filter. The second diplexer and the second B42 transceiving filter are connected to a transmission terminal of a secondary antenna of the RF circuit.

In some embodiments, the third receiving path includes:
a mutually connected third diplexer and a third B42 transceiving filter. The third diplexer and the third B42 transceiving filter are connected to a transmission terminal of the first MIMO antenna of the RF circuit.

In some embodiments, the fourth receiving path includes:
a mutually connected fourth diplexer and a fourth B42 transceiving filter. The fourth diplexer and the fourth B42 transceiving filter are connected to a transmission terminal of the second MIMO antenna of the RF circuit.

In one specific embodiment, the arrangement of the antennas associated with the four receiving paths is modified from the original <NUM>×<NUM> MIMO antennas in the <NUM>-<NUM> band. Each of the four antennas additionally supports the <NUM>-<NUM> band, while maintaining performance on other typical bands. As shown in <FIG>, the capability of receiving the B42 band signal is achieved by modifying layout of the four antennas including the first receiving path <NUM>, the second receiving path <NUM>, the third receiving path <NUM>, and the fourth receiving path <NUM>, to provide capability that support the <NUM>-<NUM> band.

A second embodiment provided in the application is an implementation method for realizing a mobile terminal for extending B42 band bandwidth. As shown in <FIG>, the implementation method includes:.

The receiving path comprises: a B42 transceiving filter and a diplexer which are connected to the four antennas of the RF circuit.

The receiving path comprises: a first receiving path connected to the primary antenna circuit of the RF circuit, a second receiving path connected to a secondary antenna circuit of the RF circuit, a third receiving path connected to a first MIMO antenna circuit of the RF circuit, and a fourth receiving path connected to a second MIMO antenna circuit of the RF circuit.

Specifically, the first receiving path includes:.

The second receiving path comprises:
a second diplexer and a second B42 transceiving filter, which are mutually connected. The second diplexer and the second B42 transceiving filter are connected to a transmission terminal of a secondary antenna of the RF circuit.

The third receiving path comprises:
a mutually connected third diplexer and a third B42 transceiving filter, wherein the third diplexer and the third B42 transceiving filter are connected to a transmission terminal of the first MIMO antenna of the RF circuit.

The fourth receiving path comprises:
a mutually connected fourth diplexer and a fourth B42 transceiving filter. The fourth diplexer and the fourth B42 transceiving filter are connected to a transmission terminal of the second MIMO antenna of the RF circuit.

With reference to <FIG> is a table showing test results of an LTE CAT16 provided in an embodiment of the application under different bands and different frequency division duplex (FDD)/time division duplex (TDD) formats.

As shown in <FIG>, the mobile terminal and the implementation method provided in the application in the FDD band can easily achieve 1Gbps throughput. TDD can achieve different throughput values with different settings, which all meet the requirements of the terminal supporting B42 band signal transmission.

The application provides a mobile terminal and an implementation method for bandwidth extension to the LTE band B42. The mobile terminal comprises: an RF circuit supporting LTE downlink three-carrier MIMO in a <NUM> to <NUM> band and a <NUM> to <NUM> LTE B42 band and a <NUM> QAM coding, wherein the LTE downlink three-carrier MIMO comprises dual carrier <NUM>×<NUM> MIMO plus single carrier <NUM>×<NUM> MIMO, a B42 transmitting path located on the RF circuit and a receiving path located on the RF circuit. The B42 transmitting path comprises a B42 RF power amplifier and a B42 power coupler, which are connected to a transmitting end of the primary antenna on the RF circuit. The receiving path comprises: a B42 transceiving filter and a diplexer, which are connected to the four antennas on the RF circuit, respectively. The mobile terminal provided in the application supports signal transmission on the B42 band and can be achieved though improving current RF circuit, which is very simple and satisfies the need for users to transmit information over larger bandwidth, and facilitates information transmission between mobile terminals for users.

Claim 1:
A mobile terminal (<NUM>) for bandwidth extension to the LTE band B42, comprising:
an RF circuit (<NUM>) configured to support LTE downlink three-carrier MIMO in a <NUM> to <NUM> band and a <NUM> to <NUM> LTE B42 band and a <NUM> QAM coding, wherein the LTE downlink three-carrier MIMO comprises dual carrier 4x4 MIMO plus single carrier 2x2 MIMO;
a B42 transmitting path (<NUM>) located on the RF circuit (<NUM>); and
a receiving path (<NUM>) located on the RF circuit (<NUM>);
wherein the B42 transmitting path (<NUM>) is connected to a primary antenna of the RF circuit (<NUM>), and the receiving path (<NUM>) is connected to four antennas of the RF circuit (<NUM>);
the B42 transmitting path (<NUM>) comprises: a B42 RF power amplifier and a B42 power coupler, which are connected to a transmission terminal of the primary antenna on the RF circuit (<NUM>); and
wherein the mobile terminal (<NUM>) is characterized in that the receiving path (<NUM>) comprises: a B42 transceiving filter and a diplexer that are connected to the four antennas of the RF circuit (<NUM>), the receiving path (<NUM>) comprises:
a first receiving path (B42 RX0) connected to the primary antenna in the four antennas of the RF circuit (<NUM>);
a second receiving path (B42 RX1) connected to a secondary antenna in the four antennas of the RF circuit (<NUM>);
a third receiving path (B42 RX2) connected to a first MIMO antenna in the four antennas of the RF circuit (<NUM>); and
a fourth receiving path (B42 RX3) connected to a second MIMO antenna in the four antennas of the RF circuit (<NUM>).