共軛梯度自適應(yīng)波束形成算法
CONJUGATE GRADIENT ADAPTIVE BEAMFORMING ALGORITHM
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摘要: 本文討論了共軛梯度算法在自適應(yīng)波束形成中的應(yīng)用,指出在時域和空域同時處理,與僅在時域或空域處理的方法相比,不僅在性能上得到了改進,而且放寬了對陣元數(shù)目的要求。同時提出了一種前后向平均和多層前后向處理的結(jié)構(gòu)和方法,使算法在性能上得到了進一步的改善。
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關(guān)鍵詞:
- 共軛梯度法; 自適應(yīng)陣列; 波束形成
Abstract: In this paper, the application of conjugate gradient method in adaptive array beamforming is studied.The combination of temporal and spatial averaging for calculating the gradient improves the beamforming performance and releases the constfaint given by G.D.Mandyam(1997)that the number of elements must be twice larger than the number of signals.New forward and backward averaging(FB)method and multilayer FB structure are proposed which further improve the beamforming performance.Several simulation results are included for illustration and comparison. -
Monzingo R A Miller T W．Introduction to Adaptive Arrays．New York：Wiley，1980，Ch.1.[2]Chapman D J. Partial adaptive array techniques，IEEE Trans on AP，1978，AP-26(5)：823-833[3]Boray G K, Srinath M D．Conjugate gradient techniques for adaptive filtering．IEEE Trans on Circuits and Systems, 1992,39(1): 1-10[4]Mandyam G D．Adaptive beamforming based on the conjugate gradient algorithm．IEEE Trans on AES,1997,AES-33(1)：343-347.[5]Griffiths L J. Adaptive lattice structure for noise-canceling applications ICASSP，Tulsa，Okla：1978，87-90. -
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