Title :
Linear multiuser detection for R-CDMA
Author :
Juntti, Markku J. ; Behnaam Aazhang ; Lilleberg, Jorma O.
Author_Institution :
Telecommun. Lab., Oulu Univ., Finland
Abstract :
Several linear multiuser detectors for code-division multiple-access (CDMA) systems can be characterized as inverses of some form of correlation matrices with infinite dimension. To obtain practical detectors for CDMA systems with time-variant signature waveforms, linear finite memory-length (referred to as FIR) multiuser detectors are analyzed in this paper. They are obtained by truncating the IIR detectors or by finding the optimal FIR detectors. An iterative implementation algorithm of truncated decorrelating detector suitable to highly parallel implementation is proposed. Since correlation computation can be embedded into the algorithm, its computational requirements are moderate. The performance of the iterative algorithms is studied by computer simulations
Keywords :
FIR filters; code division multiple access; correlation methods; iterative methods; matrix inversion; signal detection; FIR detectors; R-CDMA; code-division multiple-access; computer simulations; correlation matrices; finite memory-length detectors; highly parallel implementation; infinite dimension; iterative algorithm; linear multiuser detection; random CDMA; time-variant signature waveforms; truncated decorrelating detector; Detectors; Embedded computing; Finite impulse response filter; Iterative algorithms; Mobile handsets; Multiaccess communication; Multiuser detection; Propagation delay; Signal processing; Telecommunications;
Conference_Titel :
Global Telecommunications Conference, 1996. GLOBECOM '96. 'Communications: The Key to Global Prosperity
Conference_Location :
London
Print_ISBN :
0-7803-3336-5
DOI :
10.1109/GLOCOM.1996.586792
