Title :
Optimal sequences and total weighted square correlation of synchronous CDMA systems
Author_Institution :
Dept. of Electr. & Comput. Eng., Texas Univ., San Antonio, TX, USA
Abstract :
We characterize total weighted square correlation (TWSC) for a given signature set used in synchronous code division multiple access (S-CDMA) systems. A new theorem for TWSC and a new algorithm for obtaining real sequences that meet Welch inequality with equality are presented. Using this algorithm optimal sequences, which achieve sum capacity for overload S-CDMA systems are obtained. Numerical examples for unitary power constraint case and for arbitrary (unequal) power sets are given.
Keywords :
code division multiple access; correlation methods; eigenvalues and eigenfunctions; matrix algebra; mobile radio; sequences; S-CDMA; Welch bound equality sequences; Welch inequality; optimal sequences; sum capacity; synchronous CDMA systems; total weighted square correlation; AWGN; Base stations; Code division multiplexing; Correlation; Interference; Multiaccess communication; Multiuser detection; Power control; Quality of service; Wireless networks;
Conference_Titel :
Wireless Communications and Networking, 2003. WCNC 2003. 2003 IEEE
Conference_Location :
New Orleans, LA, USA
Print_ISBN :
0-7803-7700-1
DOI :
10.1109/WCNC.2003.1200499
