Design Of Digital Correlator In FPIR System

In the 1980s, the concept of synthesis aperture radiometer had been introduced to the realm of radiometer geometry. The basic system composition of a synthesis aperture radiometer is a two-antenna-interferometer which provides the interferometric outputs from the two antennas to improve the spatial resolution of the system. The results can be derived though a process called correlation. And the key component of synthesis aperture radiometer is the correlator whose main function is correlating the signal outputs from antennas. In this design, the correlator needs to correlate the signals from up to 10 antennas simultaneously and upload the data to PC for storage and further data processing.The design in this dissertation utilizes a microchip using FPGA (Field Programmable Gate Array) technique as a central data processing and system controlling unit, high speed ADCs, and Ethernet MAC as a whole to realize the 10-channel-8bit parallel digital correlator. And build the fundamental stone for the future satellite-based synthesis aperture radiometer.This dissertation first introduces the background of this project, and gives a quick view of the FPIR system where this correlator will be built in. Then it'll go through the whole design from hardware to VHDL (Very-High-Speed Integrated Circuit Hardware Description Language). And finally, the design is verified and simulation results or test results are shown.