Single channel source separation and parameters estimation of multi-component PRBC-LFM signal

被引：0
作者：
机构：
[1] School of Electronic and Optical Engineering, Nanjing University of Science and Technology, Nanjing , 210094, Jiangsu
[2] Unit 73015 of PLA, Huzhou , 313000, Zhejiang
来源：
Zhu, Hang | 1600年 / China Ordnance Industry Corporation卷 / 35期
关键词：
Adaptive threshold; Multi-component signal; Ordnance science and technology; Parameter extraction; PRBC-LFM signal; Source separation;
D O I：
10.3969/j.issn.1000-1093.2014.09.006
中图分类号：
学科分类号：
摘要：
A method of single channel source separation and parameters estimation of multi-component PRBC-LFM signal is proposed. The repetition period of each component can be estimated through singular value decomposition. The influence of the pseudo code on parameter extraction is eliminated through a square calculation of signal, and the interference of noise on the component under separation is reduced by cycle accumulating. The modulation rate and the carrier frequency are estimated by using FRFT and searching the discrete points. The initial phase of multi-component signal is determined by calculating the inner product, and then the pseudo random sequence and the signal amplitude are estimated by using the character of that the pseudo random sequence is a real signal. In addition, the proposed method is used to estimate SNR of mixed signal by using eigenvalue decomposition, and SNR can be used to determine the threshold adaptively. In simulation, the method is demonstrated by separating a specific signal. The result shows that the proposed method is effective under the condition of different SNRs.
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页码：1363 / 1374
页数：11
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