Title :
A new adaptive nonlinear multistage parallel interference cancellation for CDMA
Author :
Ebrahimizad, H. ; Amindavar, Hamidreza ; Dadkhah, Jahangir ; Khansari, Mohsen
Author_Institution :
Iran Telecommun. Res. Center, Tehran, Iran
Abstract :
This paper presents a new approach to multiuser detection in code division multiple access (CDMA). The proposed detector is an adaptive nonlinear parallel interference cancellation scheme that uses a nonlinear function (hyperbolic tangent) as the decision device and uses the steepest descent method for finding the parameter of this nonlinear function. Numerical simulation results show the superior performance of the proposed method.
Keywords :
AWGN channels; adaptive signal detection; code division multiple access; interference suppression; multiuser detection; nonlinear functions; radiofrequency interference; spread spectrum communication; AWGN channel; CDMA; adaptive nonlinear multistage parallel interference cancellation; additive white Guassian noise; asynchronous DS-CDMA system; code division multiple access; decision device; direct sequence CDMA system; hyperbolic tangent; multiuser detection; nonlinear function; numerical simulation results; steepest descent method; AWGN; Additive noise; Additive white noise; Decorrelation; Detectors; Interference cancellation; Mean square error methods; Multiaccess communication; Multiuser detection; Numerical simulation;
Conference_Titel :
Communication Systems, 2002. ICCS 2002. The 8th International Conference on
Print_ISBN :
0-7803-7510-6
DOI :
10.1109/ICCS.2002.1183254
