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基于特征投影預處理抗主瓣干擾的改進算法
電子技術(shù)應用
王一同1,,李文興1,,楊彬2
(1.哈爾濱工程大學 信息與通信工程學院,,黑龍江 哈爾濱 150000,; 2.杭州電子科技大學 網(wǎng)絡空間安全學院,,浙江 杭州 310018)
摘要: 針對基于特征投影預處理后旁瓣干擾偏移的問題,,提出一種基于特征投影預處理和協(xié)方差矩陣修正重構(gòu)的主瓣干擾抑制算法,。該方法首先通過最大相關系數(shù)法確定特征投影矩陣,,對接收數(shù)據(jù)進行預處理充分去除主瓣干擾,,然后對主瓣干擾信號功率置零,,重新構(gòu)造旁瓣干擾加噪聲協(xié)方差矩陣,進一步進行波束形成,,方向圖在偏移旁瓣干擾處形成較深的零陷,。仿真實驗表明,提出的方法在接收數(shù)據(jù)含有期望信號的條件下能夠有效地抑制主瓣干擾和旁瓣干擾,,并且具有良好的穩(wěn)健性,。
中圖分類號:TN911.7 文獻標志碼:A DOI: 10.16157/j.issn.0258-7998.223558
中文引用格式: 王一同,李文興,,楊彬. 基于特征投影預處理抗主瓣干擾的改進算法[J]. 電子技術(shù)應用,,2023,49(10):135-140.
英文引用格式: Wang Yitong,,Li Wenxing,,Yang Bin. Improved algorithm for anti-mainlobe interference based on eigen-projection preprocessing[J]. Application of Electronic Technique,2023,,49(10):135-140.
Improved algorithm for anti-mainlobe interference based on eigen-projection preprocessing
Wang Yitong1,,Li Wenxing1,Yang Bin2
(1.College of Information and Communications Engineering,, Harbin Engineering University,, Harbin 150000, China,; 2.College of Cyberspace,, Hangzhou Dianzi University, Hangzhou 310018,, China)
Abstract: When the eigen-projection matrix preprocessing algorithms suppress the mainlobe interference, the sidelobe interferences will shift after preprocessing and the output performance is seriously degraded. To solve this problem, the mainlobe interference suppression algorithm based on eigen-projection preprocessing and reconstruction of modified covariance matrix is proposed. The method makes use of eigen-projection to remove the mainlobe interference in the received data. Then modified sidelobe interference plus noise covariance matrix (SINCM) is constructed for further beamforming after the power of the mainlobe interference is replaced by zero. The method eliminates the effect of mainlobe interference to the adaptive weight vector. And the beam pattern forms deep nulls at deviation positions of sidelobe interferences. Simulation results show that the proposed method can effectively suppress the mainlobe interference and sidelobe interferences when the training data contains the signal of interest (SOI), and it has good robustness.
Key words : eigen-projection matrix preprocessing,;mainlobe interference;covariance matrix,;beamforming

0 引言

近年來,,自適應波束形成技術(shù)廣泛應用于無線電通信技術(shù)、雷達、聲吶,、醫(yī)學成像等領域[1-3],。自適應波束形成技術(shù)[4-8]是一種抑制旁瓣干擾的有效手段,然而當主瓣波束范圍內(nèi)存在主瓣干擾時,,傳統(tǒng)的自適應波束形成算法會造成主瓣波束畸變,、旁瓣電平升高以及輸出信干噪比(Signal to Interference and Noise Ratio, SINR)嚴重下降等問題。



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作者信息:

王一同1,,李文興1,,楊彬2

(1.哈爾濱工程大學 信息與通信工程學院,黑龍江 哈爾濱 150000,;2.杭州電子科技大學 網(wǎng)絡空間安全學院,,浙江 杭州 310018)


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