Title :
Blind adaptive multiuser detection based on linearly constrained DSE-CMA
Author :
Sun, L. ; Bi, G. ; Zhang, L.
Author_Institution :
NTRC, Nanyang Technol. Univ., Singapore, Singapore
Abstract :
A dithered signed-error constant modulus algorithm with linearly constrained criteria is presented for blind adaptive multiuser detection in DS-CDMA systems. Steps of algorithm derivation are presented and convergence is theoretically analysed. Comparisons among different reported algorithms are made based on the results of simulations in a multipath environment with signal mismatch. Compared with other reported algorithms, the studies show that with the reduced computational complexity achieved by using signed-error technique, the proposed algorithm obtains balanced improvements on a few important issues, such as the SIR performance, convergence, tracking and robustness properties in dynamic environments.
Keywords :
adaptive equalisers; blind equalisers; code division multiple access; convergence of numerical methods; multipath channels; multiuser detection; spread spectrum communication; DS-CDMA system; blind adaptive multiuser detection; convergence; direct sequence code division multiple access; dithered signed-error constant modulus algorithm; linear constrained DSE-CMA; multipath environment;
Journal_Title :
Communications, IEE Proceedings-
DOI :
10.1049/ip-com:20045076