Title :
Performance of a decorrelator based successive interference cancellation multiuser receiver for asynchronous multirate DS-CDMA systems
Author :
Yang, Bin ; Danilo-Lemoine, Florence
Author_Institution :
Dept. of Syst. & Comput. Eng., Carleton Univ., Ottawa, Ont.
Abstract :
In this paper we investigate the performance of a decorrelator based successive interference cancellation (DBSIC) multirate DS CDMA multiuser receiver over multipath Rayleigh fading channels with both perfect and imperfect channel side information. Variable processing gain (VPG) with various numbers of data rate classes is considered. The performance of DBSIC is presented using an analytical approach and simulations, and its improvement over other commonly-used suboptimum detection schemes such as the decorrelating, minimum mean square (MMSE), SIC, parallel interference cancellation (PIC) and decorrelating decision feedback (DF) receivers is demonstrated. In the case of imperfect channel estimates, it can be observed while all the receivers suffer degradation in performance, DBSIC still outperforms the other detection schemes
Keywords :
Rayleigh channels; automatic repeat request; code division multiple access; interference suppression; least mean squares methods; radio receivers; spread spectrum communication; MMSE; Rayleigh fading channels; asynchronous multirate DS-CDMA systems; decorrelating decision feedback receivers; decorrelator based successive interference cancellation; minimum mean square; multiuser receiver; suboptimum detection schemes; variable processing gain; Analytical models; Decorrelation; Degradation; Fading; Feedback; Gain; Interference cancellation; Multiaccess communication; Performance analysis; Silicon carbide;
Conference_Titel :
Military Communications Conference, 2005. MILCOM 2005. IEEE
Conference_Location :
Atlantic City, NJ
Print_ISBN :
0-7803-9393-7
DOI :
10.1109/MILCOM.2005.1605828
