Title :
Transmitter adaptation algorithm for multicellular synchronous DS-CDMA systems with multipath
Author_Institution :
Dept. of Electr. & Comput. Eng., Univ. of Texas, San Antonio, TX, USA
Abstract :
A procedure for the design of complex sequence/signature sets for a multicell system under synchronous multipath transmission is presented. The optimization criterion is the total weighted square correlation (TWSC) that incorporates transmission power and channel impulse response values. By solving an inverse eigenvalue problem related to block structured matrices, the bandwidth of initial generalized Welch bound equality signals is preserved in the extended signal space associated to multiple cell system. Numerical results for overloaded uplink multicellular direct-sequence code-division multiple-access (DS-CDMA) systems are presented in order to support our analysis.
Keywords :
cellular radio; code division multiple access; correlation methods; eigenvalues and eigenfunctions; inverse problems; matrix algebra; multipath channels; radio transmitters; sequences; spread spectrum communication; transient response; DS-CDMA system; TWSC; block structured matrix; channel impulse response; direct-sequence code-division multiple-access; generalized Welch bound equality; inverse eigenvalue problem; multicellular synchronous system; multipath transmission; optimization criterion; power transmission; signature sequence set; total weighted square correlation; transmitter adaptation algorithm; Bandwidth; Code division multiplexing; Correlation; Design optimization; Eigenvalues and eigenfunctions; Interference; Iterative algorithms; Multiaccess communication; Signal processing; Transmitters; Code-division multiple-access (CDMA) codeword optimization; generalized Welch bound equality (WBE) sequences; interference avoidance; multiple-access design; total (weighted) squared correlation;
Journal_Title :
Selected Areas in Communications, IEEE Journal on
DOI :
10.1109/JSAC.2005.858891
