基于相位匹配原理的穩(wěn)健方位估計(jì)
A Robust Criterion for Direction of Arriving Estimation Based on Phase Matched Theory
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摘要: 文中介紹了一種新的信號方位估計(jì)原理--相位匹配原理(PMT),該原理計(jì)算簡單、且不受噪聲相關(guān)特性的影響。論文提出了一個(gè)新的基于矩陣范數(shù)的判別準(zhǔn)則,該準(zhǔn)則極大地改進(jìn)了方位的估計(jì)精度和方差,并保持了算法計(jì)算簡單的特點(diǎn)。仿真結(jié)果表明改進(jìn)后的準(zhǔn)則在高信噪比下接近MUSIC的估計(jì)性能,在低信噪比下卻超過MUSIC估計(jì),而且其估計(jì)性能不受未知相關(guān)噪聲的影響。
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關(guān)鍵詞:
- 相位匹配原理; 波達(dá)方向; 未知相關(guān)噪聲
Abstract: A new method for Direction of Arriving (DOA) Estimation-Phase Matched Theory (PMT) is introduced, which computation complexity is simple and performance is unaffected by unknown correlated noise. Compared with energy criterion, a robust criterion based on SVD improves the bias and variance of estimation and the simplicity is still kept. Computer simulation shows that the criterions performance approximates MUSIC algorithm at high SNR and exceeds it at low SNR. Specially, this algorithm still has good performance under unknown correlated noise. -
孫軼源,朱維杰,孫進(jìn)才,等.利用信號相位匹配原理的正弦信號參數(shù)估計(jì).自然科學(xué)進(jìn)展,2001,11(11):1216-1220.[2]孫進(jìn)才,朱維杰,孫軼源.利用三元陣的相干干擾抵消原理及仿真研究.聲學(xué)學(xué)報(bào),2001,26(6):537-544.[3]孫進(jìn)才,朱維杰,孫軼源.利用小尺度陣的波達(dá)方向估計(jì).西北工業(yè)大學(xué)學(xué)報(bào),2003,21(2):152-155.[4]GolubGH,VanLoanC F著,袁亞湘譯.矩陣計(jì)算.北京:科學(xué)出版社,2001.8,第2章.[5]劉德樹.空間譜估計(jì)及其應(yīng)用.合肥:中國科學(xué)技術(shù)大學(xué)出版社,1997.8,第2章. -
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