DocumentCode :
1670096
Title :
On intraference and its implications in complex-valued signal processing
Author :
Took, Clive Cheong ; Douglas, Scott C. ; Mandic, Danilo
Author_Institution :
Dept. of Comput., Univ. of Surrey, Guildford, UK
fYear :
2013
Firstpage :
3934
Lastpage :
3937
Abstract :
We introduce the concept of intra-ference in order to quantify the degree to which the integrity of bivariate (or complex) sources is preserved in applications based on matrix decompositions of bivariate data. This is achieved by examining the pseudocovariance matrix of noncircular complex sources, and by recognising that the pseudocovariance is intrinsically complex valued. We illuminate how the existing decompositions such as the strong uncorrelating transform (SUT) not only decorrelate the bivariate sources from one another, but also decorrelate and scatter the data channels within each bivariate source, thus violating source integrity. Examples showing that the intra-ference arises due to the phase ambiguity in the existing matrix decompositions support the approach.
Keywords :
covariance matrices; independent component analysis; matrix decomposition; signal processing; telecommunication channels; SUT; bivariate data; complex-valued signal processing; data channels; intraference; matrix decompositions; noncircular complex sources; phase ambiguity; pseudocovariance matrix; strong uncorrelating transform; Approximation methods; Correlation; Decorrelation; Educational institutions; Matrix decomposition; Signal to noise ratio; augmented complex statistics; independent component analysis; intraference; pseudocovariance;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Acoustics, Speech and Signal Processing (ICASSP), 2013 IEEE International Conference on
Conference_Location :
Vancouver, BC
ISSN :
1520-6149
Type :
conf
DOI :
10.1109/ICASSP.2013.6638396
Filename :
6638396
Link To Document :
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