基于自适应窗长WD分析的伪码调相-载波调频复合引信信号的参数提取研究
doi: 10.3724/SP.J.1146.2006.00185
The Study on Parameters Extraction of Pseudo Code Phase Modulation-Carry Frequency Modulation Combined Fuse Signal Based on the Adaptive Window Length WD Analysis
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摘要: 该文研究了自适应窗长时频分析的理论及其实现方法，利用该方法对伪码体制复合引信信号进行脉冲内特征分析。这些信号具体包括伪码调相信号、伪码调相与正弦调频复合信号、伪码调相与线性调频复合信号。仿真结果表明，在信噪比为10dB时，利用自适应窗长时频分析技术，不但可以提取载频调制的特征信息，而且能够有效提取相位突变位置的特征信息。Abstract: The theory and its implementation on the adaptive window length in the analysis of time frequency are presented in this paper. This method is used to analysis the in-pulse characteristics of pseudo-code fuse signals such as Pseudo-Code Phase Modulation (PCPM), pseudo-code phase modulation combined by Sinusoid Frequency Modulation (SFM) and pseudo-code phase modulation combined by Linear Frequency Modulation (LFM). The simulation result shows that both the characteristic of carry frequency modulation and phase changed position caused by the pseudo-code can be extracted effectively in SNR=10dB.
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