Title :
Improved parallel interference cancellation algorithm for multicode CDMA system
Author :
Zhao, Junhui ; Yijun Gui ; Wang, Dongming ; You, Xiaohu
Author_Institution :
Nat. Mobile Commun. Res. Lab., Southeast Univ., Nanjing, China
Abstract :
An improved parallel interference cancellation (PIC) algorithm by iterative channel estimation for multicode CDMA system is proposed in this paper. Channel parameter is firstly estimated with the aid of pilot symbols, and then is refined by using soft information from data symbol after rake receiver. Parallel interference cancellation (PIC) is adapted to multicode interference (MCI) at the second step. Simulation Results show that the error floor of the system can be reduced significantly. The effect of different parameter on the symbol error ratio (SER) performance of the multicode CDMA are also investigated in this paper, such as the quality of channel estimation PIC cancellation factor and the number of parallel interference cancellation.
Keywords :
channel estimation; code division multiple access; interference suppression; radio receivers; cancellation factor; coded division multiple access system; data symbol; interference cancellation rate; iterative channel estimation; multicode CDMA system; multicode interference; parallel interference cancellation algorithm; pilot symbol; rake receiver; symbol error ratio; AWGN; Channel estimation; Data communication; Fading; Interference cancellation; Iterative algorithms; Iterative methods; Multiaccess communication; Multipath channels; Pulse modulation;
Conference_Titel :
Neural Networks and Signal Processing, 2003. Proceedings of the 2003 International Conference on
Conference_Location :
Nanjing
Print_ISBN :
0-7803-7702-8
DOI :
10.1109/ICNNSP.2003.1281177
