Title :
A new sign algorithm for interference suppression in DS-CDMA systems
Author :
Sun, Liping ; Hu, Guangrui
Author_Institution :
Dept. of Electron. Eng., Shanghai Jiaotong Univ., China
fDate :
5/1/2003 12:00:00 AM
Abstract :
A blind adaptive step-size averaging blind sign algorithm (AS-asign) for suppression of multiple access interference (MAI) in direct-sequence/code-division multiple access (DS/CDMA) systems is proposed. It combines the sign-regressor algorithm and the concept of variable step-size, uses a second least mean square algorithm for the step size of blind averaging sign-regressor algorithm. Simulations indicate that this algorithm yields improvements over similar adaptive step-size algorithm in dynamic environments.
Keywords :
AWGN channels; code division multiple access; interference suppression; least mean squares methods; multiuser detection; radiofrequency interference; spread spectrum communication; AWGN channel; DS-CDMA systems; Gold codes; LMS algorithm; additive white Gaussian noise channel; blind adaptive step-size averaging algorithm; blind averaging sign-regressor algorithm; blind multiuser detection; blind sign algorithm; direct-sequence/code-division multiple access; dynamic environments; interference suppression; least mean square algorithm; multiple access interference suppression; simulations; spreading sequences; variable step-size; AWGN; Additive white noise; Constraint optimization; Convergence; Detectors; Gaussian noise; Interference suppression; Least squares approximation; Multiaccess communication; Multiple access interference;
Journal_Title :
Communications Letters, IEEE
DOI :
10.1109/LCOMM.2003.811194
