Patent ID: 8693595
Filing Date: 2014-04-08
Classification: H04B

Abstract:
1. An adaptive wireless communication receiver, capable of detecting the presence or absence of an adjacent channel interference (ACI) before receiving a communication packet to accordingly set the receiver configurations, comprising: an antenna, receiving a radio frequency (RF) signal before receiving a communication packet in a scheduled starting time of the receiver; a low noise amplifier (LNA), having a first input terminal electrically connected to the antenna, a second input terminal and an output terminal, used for amplifying the radio frequency (RF) signal according to a low noise amplifier (LNA) control signal; a mixer, having an input terminal electrically connected to the output terminal of the low noise amplifier (LNA) and an output terminal, used for down-converting the radio frequency (RF) signal to an intermediate frequency (IF) signal; an adaptive analog filter, having a first input terminal electrically connected to the output terminal of the mixer, a second input terminal and an output terminal, used for suppressing the interference and noise outside the desired bandwidth of the intermediate frequency (IF) signal, and with options according to an adjacent channel interference (ACI) indicator; a variable gain amplifier (VGA), having a first input terminal, a second input terminal and an output terminal, used for amplifying a first signal outputted from the adaptive analog filter according to a variable gain amplifier (VGA) control signal; a switch, having a first input terminal electrically connected to the output terminal of the adaptive analog filter, a second input terminal electrically connected to the output terminal of the mixer, a third input terminal, and an output terminal electrically connected to the first input terminal of the variable gain amplifier (VGA), used for connecting either the mixer or the adaptive analog filter to the variable gain amplifier (VGA) according to a switch control signal; an adaptive analog-to-digital converter (ADC), having a first input terminal electrically connected to the output terminal of the variable gain amplifier (VGA), a second input terminal and an output terminal, used for converting a second signal outputted from the variable gain amplifier (VGA) to a third digital signal, and with options according to the adjacent channel interference (ACI) indicator; an automatic gain control (AGC) unit, having a first input terminal electrically connected to the output terminal of the adaptive analog-to-digital converter (ADC), a second input terminal, a first output terminal electrically connected to the second input terminal of the low noise amplifier (LNA), a second output terminal electrically connected to the second input terminal of the variable gain amplifier (VGA) and a third output terminal, used for measuring, tracking the signal power of the third digital signal outputted from the adaptive analog-to-digital converter (ADC), determining the appropriate gain setting of the low noise amplifier (LNA) and the variable gain amplifier (VGA), setting the low noise amplifier (LNA) control signal and the variable gain amplifier (VGA) control signal, respectively, and outputting the low noise amplifier (LNA) control signal to the low noise amplifier (LNA) by the first output terminal, the variable gain amplifier (VGA) control signal to the variable gain amplifier (VGA) by the second output terminal, and a measured signal power, P an adaptive receiver algorithm unit, having an input terminal electrically connected to the third output terminal of the automatic gain control (AGC) unit, a first output terminal electrically connected to the second input terminal of the an adaptive analog filter, the second input terminal of the adaptive analog-to-digital converter (ADC), and a second output terminal electrically connected to the third input terminal of the switch, used for receiving the measured signal power, P a digital filter, electrically connected to the output terminal of the adaptive analog-to-digital converter (ADC), used for suppressing the signal power outside the desired signal bandwidth (BW) of the third digital signal; and a digital decoder, electrically connected to the digital filter, used for decoding a fourth signal outputted from the digital filter, wherein the adaptive analog filter is bypassed by setting the switch and the adjacent channel interference (ACI) is determined by the automatic gain control (AGC) after bypassing the adaptive analog filter; the adjacent channel interference (ACI) indicator is set to one if the measured power, P the adjacent channel interference (ACI) indicator is set to zero if the measured power, P