Multi-Channel Data Acquisition and I-Q Demodulation With Frequency Folding for Digital Receiver

Abstract

A Fully digitized multichannel data acquisition system implemented by using FPGA with ADC having the excellent feature of Frequency folding which converts 64MHz signal into 4MHz. The digital down conversion taking place with the help of DDS which has frequency resolution of 1 Hz. The decimation of samples takes place using the Polyphase FIR filter.