Patent ID: 8693967
Filing Date: 2014-04-08
Classification: H04B

Abstract:
1. A receiver for receiving a first communication signal and a second communication signal, comprising: a first mixer, for down-converting an input radio-frequency signal comprising the first communication signal and the second communication signal into a first low-frequency signal according to a first local oscillating signal; a second mixer, for down-converting the input radio-frequency signal into a second low-frequency signal according to a second local oscillating signal; and a processing circuit, coupled to the first mixer and the second mixer, for generating at least one phase-shifted low-frequency signal according to at least the first low-frequency signal, for extracting signal components of the first communication signal by rejecting signal components of the second communication signal according to the second low-frequency signal and the at least one phase-shifted low-frequency signal, and for extracting signal components of the second communication signal by rejecting signal components of the first communication signal according to the second low-frequency signal and the at least one phase-shifted low-frequency signal; wherein the first communication signal is situated in a first frequency range different from a second frequency range in which the second communication signal is situated, and the processing circuit comprises: a first polyphase filter, coupled to the first and second mixer, for receiving the first and second low-frequency signals, and for rejecting the second communication signal and extracting the first communication signal according to the first and second low-frequency signals; and a second polyphase filter, coupled to the first and second mixer, for receiving the first and second low-frequency signals, and for rejecting the first communication signal and extracting the second communication signal according to the first and second low-frequency signals.