Mixed multi-channel radio frequency signal sampling and processing system

The invention provides a sampling and processing system for mixed multi-channel radio frequency signals. The sampling and processing system comprises a multi-channel radio frequency signal receiving unit for receiving radio frequency signals of different channels; the plurality of LNAs amplify the radio frequency signal, and each path of amplified signal is divided into two sub-paths of signals; a plurality of voltage comparators respectively receive one sub-path signal of one path of amplified signal and compare the sub-path signal to generate a channel data control signal; the broadband combiner receives the other sub-path signal of each path of amplified signal and mixes a plurality of sub-path signals into a single-path analog signal; the ADC is used for sampling the single-path analog signal and converting the single-path analog signal into a digital signal; and the FPGA receives the multi-channel data control signal and the digital signal and calculates to obtain the azimuth angle of the target. Accordi