Direct RF complex analog to digital converter

摘要

An analog to digital converter device that includes a sample rate reduction system configured to sample a radio frequency (RF) signal. The RF signal has a bandwidth centered at a first frequency. The sample rate reduction system is configured to directly sample the RF signal at a sampling rate that is an integer multiple of the first frequency. The sample rate reduction system also is configured to provide M-sample outputs, each of the M-sample outputs being sampled at a reduced sampling rate equal to the sampling rate divided by M. M is an integer sample rate reduction value. An N^th order complex bandpass filter is coupled to the sample rate reduction system. The complex bandpass filter is configured to filter each of the M-sample outputs to obtain a plurality of complex baseband signals.