一种用于多相编码信号参数估计的MST改进算法

doi:10.3969/j.issn.1001-2400.2016.04.007

Abstract

Abstract:

The polyphase coded signal is a kind of low probability of intercept radar signal which has the similar time frequency distribution as the linear frequency modulation signal. Now the parameter estimation of the polyphase coded signal has been a new research hotspot. Based on the matched signal transform theory, this paper derives the chirp rate estimation performance when the intercepted signal mismatches the time function. According to the characteristics of the quadratic polynomial function and the problems under actual reconnaissance environment, such as residual frequency error, incomplete signal and noise interferences, a modified matched signal transform based on two-dimension search is proposed. Experiments on the P4 code analyze the parameter estimation performance. Experimental results verify that the algorithm can solve the problem of signal mismatch and has good properties of accuracy, calculation speed and engineering application.

Key words: polyphase coded signals, matched signal transform, complex environment, chirp rate

JIANG Li;LI Lin;ZHAO Guoqing. Modified MST for the parameter estimation of polyphase coded signals[J].Journal of Xidian University, 2016, 43(4): 34-38+99.

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Modified MST for the parameter estimation of polyphase coded signals

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