一種數(shù)字脈壓旁瓣抑制濾波器設(shè)計方法
A METHOD TO DESIGN DIGITAL PULSE COMPRESSION FILTERS FOR SIDELOBE SUPPRESSION
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摘要: 本文使用迭代加權(quán)最小二乘法設(shè)計脈沖壓縮濾波器,適用于二相碼和多相碼,LFM和NLFM等各種信號。由于重新定義了目標函數(shù)和約束條件,本文方法較之常用的頻域加窗法性能有很大提高。多普勒頻移fd=0時,在保持4dB主瓣展寬系數(shù)為1,且壓縮比較低、濾波器抽頭數(shù)有限條件下,峰值旁瓣電平低于-40dB。
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關(guān)鍵詞:
- 脈沖壓縮; 旁瓣抑制; 最小二乘法
Abstract: This paper uses iteratively reweighted least square method to design pulse compression filters,which is applicable to biphase code:polyphase code,LPM and NLFM signals.As we redefine the object function and constraint condition, the performance of this method is superior to that of the conventional frequency domain weighted window method.When the Doppler frequency shift fd=0 and the coefficient of 4dB mainlobe width is kept to be 1 and the compression ratio is not high and the tap number of FIR filter is limited, the peak sidelobe level is less than -40dB. -
林茂庸，柯有安．雷達信號理淪．北京：國防工業(yè)出版社，1984．[2]Richaczek A W，Golden R M．Range sidelobe suppression for Barker codes IEEE Trans on AES、1971，AES-7(6)：1087-1092．[3]陳瑤琴，陳曉華．Barker碼脈壓濾波器優(yōu)化設(shè)計及性能研究．電子學報，1986，14(6)：91-98．[4]Ackroyd M H，Ghani F．Optimum mismatched filters for sidelobe suppression．IEEE Trans on AES，1973，AES-9(2)：214-217．[5]Baden J M, Cohen M N．Optimal peak sidelobe filters for biphase pulse compression Proc of IEEE International Radar Conference，New York：1990，249-252．[6]Griep K R，Ritchy J A，Burlingame J J．Poly-phase codes and optimal filters for multiple user ranging. lEEE Trans on AES, 1995，AES-31(2)：752-767. -
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