Title :
Source detection in the presence of nonuniform noise
Author :
Aouada, Saïd ; Zoubir, Abdelhak M. ; See, Chong Meng Samson
Author_Institution :
Signal Process. Group, Darmstadt Univ. of Technol., Germany
Abstract :
We consider the problem of source number estimation in the presence of unknown spatially nonuniform noise. Successive array element suppression is applied to isolate the contribution of the noise powers and a likelihood function is derived. When it is combined with the appropriately defined penalty function, a MDL-like criterion is defined. Performance of the new criterion is assessed through simulations and it is shown that the method is powerful in a nonuniform noise environment.
Keywords :
array signal processing; covariance matrices; eigenvalues and eigenfunctions; interference suppression; maximum likelihood detection; maximum likelihood estimation; NU-MDL; array signal processing; covariance matrix transformation; eigenvalues; likelihood function; minimum description length; noise powers; nonuniform MDL criterion; penalty function; sensor array; source detection; source number estimation; successive array element suppression; unknown spatially nonuniform noise; Array signal processing; Covariance matrix; Detectors; Eigenvalues and eigenfunctions; Radar detection; Sensor arrays; Signal processing algorithms; Testing; Transmission line matrix methods; Working environment noise;
Conference_Titel :
Acoustics, Speech, and Signal Processing, 2004. Proceedings. (ICASSP '04). IEEE International Conference on
Print_ISBN :
0-7803-8484-9
DOI :
10.1109/ICASSP.2004.1326220
