鍏抽敭璇�: 鍏ㄦ瀬鍖栧井娉㈣緪灏勮, 鏁板瓧鐩稿叧鍣�, 8 bit閲忓寲璇樊

Abstract: Fullypolarization microwave radiometer is a passive remote sensing device that measures the target鈥檚 microwave radiation characteristics.It is a complete extractiontechnology of polarization information such as amplitude锛宖requency and phase based on the traditional microwave radiometer.Digital correlator utilizes high-speed analog-to-digital converter and programmable logic device FPGA to realize quantification processing and related operations of horizontal and vertical channel signal.Compared to analog correlators锛宒igital correlators have the advantage of high bandwidth and immunity from DC interference锛宐ut quantification errors are also introduced in the quantification process.This paperanalyzes the influence of 8 bit quantification on the correlation coefficient before and after quantification on digital correlation fully polarization radiometer whichdeveloped by NSSC.By determining the appropriate A/D quantification threshold锛宨t is ensured that the error of the digital correlator has the least influence on the radiometer system.The reliability of the analysis conclusion is verified by modeling and simulation.The results show that the quantification error of 8 bit digital correlator developed by the project can be neglected to the system error.

Key words: Fully polarization microwave radiometer, Digital correlator, 8 bit quantification error