贾鹏,丛丰裕,周士弘,杜栓平,史习智.非正则复向量的扩展MVDR算法研究[J].声学技术,2008,(1):106~109 |
非正则复向量的扩展MVDR算法研究 |
Improper complex vector-oriented ExMVDR algorithm |
投稿时间:2007-01-15 修订日期:2007-05-08 |
DOI: |
中文关键词: 非正则 复向量 MVDR 扩展自相关矩阵 |
英文关键词: improper complex vector MVDR extended autocorrelation matrix |
基金项目:上海市科委基础研究项目(No:05JC14026);国家重点实验室开放式基金项目(VSN-2006-04) |
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中文摘要: |
研究了非正则复向量的特性对MVDR算法的影响。将阵元接收数据经过FFT运算后,在任一频率下的列向量都是非正则复向量。根据非正则复向量伪自相关阵的特性,提出了扩展自相关矩阵和扩展驾驶向量,推导出了扩展MVDR(ExMVDR)算法。仿真试验表明ExMVDR算法比MVDR能够更好的压制旁瓣,主瓣的信噪比能够提高2dB左右。 |
英文摘要: |
The influence of the characteristic of the improper complex vector on MVDR algorithm is stu-died.After FFT is performed on the received data from array,the column vector in each frequency bin is improper.According tothe characteristic of the pseudo-autocorrelation matrix of the improper complex vector,the extended autocorrelation matrix and the extended steering vector are brought forward.Thereby,a new extended MVDR(ExMVDR) algorithm is presented.Simulation results show that ExMVDR can suppress the side-lobe well and improve the SNR of main lobe about 2dB. |
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