數(shù)域處理的二相編碼信號(hào)旁瓣抑制技術(shù)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: 該文從二相編碼信號(hào)的頻譜結(jié)構(gòu)分析入手,采用頻域數(shù)字處理方法,研究了二相編碼長(zhǎng)碼雷達(dá)信號(hào)距離旁瓣頻域抑制加權(quán)技術(shù),提出一種適用于各種碼長(zhǎng)不同碼序列的編碼信號(hào)旁瓣抑制濾波器(SSF)頻域設(shè)計(jì)方法。并以127位二相編碼信號(hào)為例,對(duì)SSF處理的性能進(jìn)行仿真分析和實(shí)驗(yàn)測(cè)試。當(dāng)fd=0時(shí),仿真與實(shí)測(cè)結(jié)果的主副比分別達(dá)到50dB和43dB。這表明采用這種方法所設(shè)計(jì)的二相碼信號(hào)SSF可以應(yīng)用于現(xiàn)代雷達(dá)系統(tǒng),并得到滿意的性能指標(biāo)。
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關(guān)鍵詞:
- 二相編碼信號(hào); 旁瓣抑制; 主副比; FFT
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. -
林茂庸,雷達(dá)信號(hào)理論,北京,國(guó)防工業(yè)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]劉強(qiáng),雷達(dá)脈壓信號(hào)優(yōu)化設(shè)計(jì)及數(shù)字處理研究,[博士學(xué)位論文],成都,電子科技大學(xué),1993. -
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