Title :
On the minimization of the total generalized squared correlation of synchronous DS-CDMA
Author :
Cotae, Paul ; Musku, Madhusudhan Reddy
Author_Institution :
Dept. of Electr. & Comput. Eng., Univ. of Texas at San Antonio, San Antonio, TX
fDate :
April 30 2007-May 2 2007
Abstract :
We characterize the total generalized squared correlation (TGSC) for a given signature sequence set used in uplink synchronous code division multiple access (S-CDMA) when channel state information is known perfectly at both transmitter and receiver. We give a definition of the TGSC based on the eigenvalues of Gram matrix associated to signature sequences set for multipath channels in the presence of the colored noise. Total squared correlation (TSC) and total weighted squared correlation (TWSC) measures are particular cases of TGSC. Modified alternating projection method and gradient flow method for minimizing TGSC (TSC, TWSC) in multipath channels and in the presence of the colored noise are investigated.
Keywords :
code division multiple access; correlation methods; gradient methods; matrix algebra; minimisation; multipath channels; telecommunication links; Gram matrix; colored noise; gradient flow method; modified alternating projection method; multipath channel state information; signature sequences set; synchronous DS-CDMA; total generalized squared correlation minimization; total weighted squared correlation; uplink synchronous code division multiple access; Bit error rate; Channel state information; Code division multiplexing; Colored noise; Correlation; Covariance matrix; Interference; Multiaccess communication; Multipath channels; Transmitters; CDMA codeword optimization and Gram matrix; Welch Bound Equality (WBE) sequences; total squared correlation (TSC); total weighted square correlation (TWSC);
Conference_Titel :
Sarnoff Symposium, 2007 IEEE
Conference_Location :
Nassau Inn, Princeton, NJ
Print_ISBN :
978-1-4244-2483-2
DOI :
10.1109/SARNOF.2007.4567323
