Abstract：Three methods such as zero across and FFT and correlation analysis are introduced to measure phase difference for the test of missile automatic pilot. The virtual instrument based on LabView is used to realize the three methods. The advantage and disadvantage for these three methods are analyzed through simulation. The phase difference measurement by correlation analysis has the advantages of high precision and strong anti-jamming， so this paper emphasis on correlation analysis. Correlation analysis arithmetic is optimized and realized in low SNR. Through simulation， the ameliorated method of correlation can improve the test accuracy of phase difference efficiently. The algorithm has been applied to a missile automatic pilot testing system， the results has shown the validity of the algorithm.
曹奕涛, 淳莉, 张宏军, 赵洪峰, 周小川. 低信噪比信号相位差检测算法优化设计与实现[J]. 空天防御, 2019, 2(1): 47-52.
CAO Yitao, CHUN Li, ZHANG Hongjun, ZHAO Hongfeng, ZHOU Xiaochuan. The Design and Implementation of Algorithm to Optimize the Phase Difference Detection in Low SNR. Air & Space Defense, 2019, 2(1): 47-52.
