数域处理的二相编码信号旁瓣抑制技术研究
Study on range sidelobe suppression techniques of biphase coded signals based on the processing in frequency domain
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摘要: 该文从二相编码信号的频谱结构分析入手,采用频域数字处理方法,研究了二相编码长码雷达信号距离旁瓣频域抑制加权技术,提出一种适用于各种码长不同码序列的编码信号旁瓣抑制滤波器(SSF)频域设计方法。并以127位二相编码信号为例,对SSF处理的性能进行仿真分析和实验测试。当fd=0时,仿真与实测结果的主副比分别达到50dB和43dB。这表明采用这种方法所设计的二相码信号SSF可以应用于现代雷达系统,并得到满意的性能指标。Abstract: This paper studies the range sidelobe suppression techniques for long-biphase coded signals by applying digital processing in Frequency domain. By analyzing the spectrum characteristics, a design method in frequency domain for Sidelobe Suppression Filters (SSF), which is suitable for various code lengths and different code sequences, is presented. As an example, computer simulations and experimental results of 127-bit biphase coded signals processed by the SSF are also given. When fd = 0, RMS are achieved to 50dB and 43dB for simulations and experiments respectively. These show that biphase coded signal SSF designed by this method can be applied in modern radar systems, and the satisfactory performance are achieved.
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林茂庸,雷达信号理论,北京,国防工业出版社,1984,153-178.[2]Chen Xiaohua, J. Oksman, A new algorithm to optimize barker code sidelobe suppression filters,IEEE Trans. on AES, 1990, 29(4), 673-677.[3]M.N. Cohen, J. M. Baden, P. E. Cohen, Biphase codes with minimum peak sidelobes, Proc. of IEEE National Radar Conference, 1989, Dallas, Texas, 62-66.[4]刘强,雷达脉压信号优化设计及数字处理研究,[博士学位论文],成都,电子科技大学,1993. -
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