Title :
A robust source enumeration algorithm for low SNR coherent signals based on eigenvectors
Author :
Guo, Jianxin ; Huo, Wenjun ; Fan, Changzhou ; Zhang, Hui
Author_Institution :
Telecommun. Eng. Inst., Air Force Eng. Univ., Xi´´an, China
Abstract :
A robust source enumeration algorithm is proposed for coherent signals at low signal-to-noise ratio conditions. The approach determines the source number by exploiting the modified covariance matrix and its eigenvectors other than the eigenvalues used in traditional methods. By using a series of transformation of the snapshot vectors and eigenvectors, new decision variables which have better immunity to noise than eigenvalues are obtained. The theory analyses and the simulation results show that the proposed algorithm can achieve improved performance at lower SNR.
Keywords :
array signal processing; covariance matrices; eigenvalues and eigenfunctions; vectors; SNR coherent signal; array signal processing; covariance matrix; eigenvector; signal-to-noise ratio condition; snapshot vector; source enumeration algorithm; Arrays; Covariance matrix; Eigenvalues and eigenfunctions; Signal processing algorithms; Signal to noise ratio; array signal processing; coherent signals; eigenvector; source enumeration;
Conference_Titel :
Image and Signal Processing (CISP), 2010 3rd International Congress on
Conference_Location :
Yantai
Print_ISBN :
978-1-4244-6513-2
DOI :
10.1109/CISP.2010.5647614