Title :
Near optimum low complexity MMSE multi-user detector
Author :
Chen, Sheng-Chung ; Chen, Kwang-Cheng
Author_Institution :
Dept. of Electronical Eng., Nat. Taiwan Univ., Taipei, Taiwan
fDate :
6/24/1905 12:00:00 AM
Abstract :
In this paper we propose a novel multiuser detector for the synchronous CDMA system. Its BER performance approaches the optimum MMSE multiuser detector while the complexity only polynomially increases to the number of active users. We also demonstrate its complexity and performance against the optimum MMSE multiuser detector and decorrelator. In addition to the synchronous AWGN channel case, we also provide the mechanism for the asynchronous case, Rayleigh fading channel case, and frequency selective channel case.
Keywords :
AWGN channels; Rayleigh channels; code division multiple access; error statistics; interference suppression; least mean squares methods; mobile radio; multiuser channels; time-varying channels; AWGN channel; BER performance; MMSE multiuser detector; Rayleigh fading; asynchronous channel; direct-sequence code division multiple access; frequency selective channel; interference suppression; mobile communication; polynomial complexity; synchronous CDMA; Bit error rate; Code division multiplexing; Covariance matrix; Detectors; Matched filters; Multiaccess communication; Multiple access interference; Multiuser detection; Polynomials; Vectors;
Conference_Titel :
Vehicular Technology Conference, 2002. VTC Spring 2002. IEEE 55th
Print_ISBN :
0-7803-7484-3
DOI :
10.1109/VTC.2002.1002827
