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�������պ����ѧѧ�� 2012, Vol. Issue (4) :444-448    DOI:
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Detection of the number of sources using peak-to-average power ratio modified by Gerschgorin radii
Jiao Yameng, Huang Jianguo, Hou Yunshan*
College of Marine, Northwestern Polytechnical University, Xi-an 710072, China

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ժҪ �������ˮ�º�����������������������Ҫ�����Զ�Ŀ��ļ������������,�����һ�ֲ��øǶ�Բ�뾶����������ʱȵ���Ϣ�۷���(PGAIC, An Information Criterion using Peak-to-average Power Ratio Modified by Gerschgorin Radii).�÷��������ò���Э�����������������Խ������ݽ��м�Ȩ,�����������ʱ�,Ȼ��Բ���Э���������ת��������иǶ�Բ�任,�øǶ�Բ�뾶������Ӧ�ķ�����ʱ�ֵ,����������ķ�����ʱ�ֵӦ�����µ���Ϣ�۷����õ�PGAIC��Դ׼��.����������,PGAIC������������¼���������ڴ�ͳ��AIC(Akaike Information Criterion)��MDL(Minimum Description Length)�ȷ���,�Ҳ���Ŀ��ǿ�Ȳ��Ӱ��.
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Abstract�� Aiming at solving the problem of improving detection ability of unmanned underwater vehicle. An information criterion for source number detection with the peak-to-average power ratio modified by Gerschgorin radii (PGAIC) was proposed. The method first employed eigenvectors of the sample covariance matrix to weight the received data and calculated the peak-to-average power ratio, then took a Gerschgorin transform to the sample covariance matrix, next the new peak-to-average power ratios modified by Gerschgorin radii were introduced to Akaike information criterion(AIC) with the transformed covariance matrix. Simulation results show that PGAIC method is superior to conventional detection methods such as AIC and minimum descrition lengh(MDL) at lower signal to noise ratio, not affected by the intensity difference between the targets.
Keywords�� unmanned underwater vehicle   multi-target detection   Gerschgorin radii   peak-to-average power ratio   information criterion     
Received 2010-12-31;
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Jiao Yameng, Huang Jianguo, Hou Yunshan.Detection of the number of sources using peak-to-average power ratio modified by Gerschgorin radii[J]  JOURNAL OF BEIJING UNIVERSITY OF AERONAUTICS AND A, 2012,V(4): 444-448
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