二相編碼雷達(dá)信號的旁瓣抑制和擴(kuò)展多普勒容限研究
SIDELOBE SUPPRESSION AND DOPPLER-TOLERANCE IMPROVEMENT OF BIPHASE CODED SIGNAL
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摘要: 著重研究二相編碼長碼長雷達(dá)信號的距離旁瓣抑制加權(quán)處理問題,闡述了一種從頻域結(jié)構(gòu)分析入手、運(yùn)用于各種碼長信號的設(shè)計(jì)最小峰值旁瓣濾波器的方法,并給出了190位碼的計(jì)算機(jī)模擬結(jié)果。針對相位編碼信號的多普勒頻移靈敏問題,提出了頻率分集處理和非相干型旁瓣抑制濾波器相結(jié)合的方法,以改善多普勒性能。模擬結(jié)果表明,頻域分析法結(jié)合非相干加權(quán)方式設(shè)計(jì)出的最小峰值旁瓣濾波器,較好地滿足了現(xiàn)代雷達(dá)系統(tǒng)的要求。
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關(guān)鍵詞:
- 雷達(dá)信號; 相位編碼信號; 旁瓣抑制濾波器; 多普勒容限
Abstract: The issue of range sidelobe suppression filters for biphase coded signals is investigated. By analysing the characteristic in frequency domam, a design method for minimized peak sidelobe filters, which is suited for various code length is suggested. The computer simulation of sidelobe suppression is made based on 190-bit biphase coded signals. This paper presents a method to improve the Doppler-tolerance by combining the frequency diversity and non-coherent sidelobe reduction filters. The simulation results show that the peak sidelobe reduction filters meet the requirements of modern radar systems. -
林茂庸,柯有安,雷達(dá)信號理論,國防工業(yè)出版社,北京,1984年，第153-160頁.[2]向敬成,邱萬智,陳輔新,非相參積累雷達(dá)大壓縮比二相編碼信號的研究,電路與系統(tǒng)學(xué)報(bào),1(1989)4,389-396.[3]E.L.Key, E.N. Fowle, R.D. Hargarty, A Method of Sidelobe Suppression in Phase-Coded Pulse Compression Systems. MIT Lincoln Lab. Tech. Rept. 209, Aug, 1959.[4]A.W. Rihaczek, R.M. Golden, IEEE Trans. on AES, AES-7(1971)6 1087-1092.[5]G. Gaiari, M. Orsini, Doppler-Tolerant Digital Pulse Compression with Minimized Hard-[6]ware, International Radar Conference, Paris, 1984, pp. 22-27. -
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