Title :
Distributive iterative method for minimizing generalized total square correlation of CDMA systems
Author_Institution :
Texas Univ., San Antonio, TX, USA
Abstract :
We define the total generalized square correlation (TGSC) for a given signature sequence set used in code division multiple access (CDMA) systems in the presence of colored noise. Total square correlation (TSC) and total weighted correlation (TWSC) are particular cases of TGSC and are considered as well. We provide an iterative and distributed method for obtaining sequences that minimize TGSC. The method is based on majorization theory decreasing the weighted Frobenius norm associated with users´ Gram signature matrix.
Keywords :
code division multiple access; correlation theory; covariance matrices; eigenvalues and eigenfunctions; iterative methods; random noise; sequences; set theory; CDMA; Gram signature matrix; code division multiple access; colored noise; covariance matrix; distributed method; distributive iterative method; eigenvalues; generalized total square correlation; majorization theory; minimization; signature sequence set; total generalized square correlation; total weighted correlation; weighted Frobenius norm; Active noise reduction; Code division multiplexing; Colored noise; Correlation; Covariance matrix; Eigenvalues and eigenfunctions; Iterative methods; Multiaccess communication; Signal processing; White noise;
Conference_Titel :
Information Theory Workshop, 2003. Proceedings. 2003 IEEE
Print_ISBN :
0-7803-7799-0
DOI :
10.1109/ITW.2003.1216701
