Wideband receiver architecture tolerant to in-band interference

摘要

A wideband receiver circuit is disclosed that includes a signal input configured to receive a spectrum signal of bandwidth B that contains an RF signal and an interference signal. A down conversion module is connected to the signal input and has N down conversion channels, wherein each of the N down conversion channels is configured to down convert the spectrum signal to one of N decimated baseband signals by processing the spectrum signal with one distinct phase of a sequence of length N and period N/fclk=N/2B to generate a baseband output signal. An amplifier circuit is connected to each of the N down conversion channels, and is configured to amplify the baseband output signal. A digital signal processing module including an analog to digital conversion circuit is connected to each amplifier circuit and is configured to convert the amplified baseband output signal to N digital signals. The digital signal processing module also having a digital reconstruction processor to combine each of the N digital signals and generate a reconstructed RF signal.