A new wireless receiver topology

The traditional heterodyne wireless receivers are based on frequency-downconversion(FD) topologies, which is hard to be implemented with RF CMOS technologies with high integration level due to the problems caused by mirror suppression, strict matching and DC-offset. We propose a non-frequency-downconversion(NFD) wireless receiver topology. First, we recover the Fourier series coefficients of the modulated RF signal corresponding to a certain time interval by analog circuits. This is followed by feeding the coefficients to a DSP to demodulate the baseband information modulated in the RF signal. Because this new topology does not require mirror suppression and strict matching, it is suitable for the implementation of RF CMOS receivers with high level integration.