A new interference cancellation technique for CDMA signals

Author

Karami, Ebrahim ; Shiva, Mohsen

Author_Institution

Dept. of Electr. & Comput. Eng., Tehran Univ., Iran

Volume

2

fYear

2003

fDate

14-17 Dec. 2003

Firstpage

651

Abstract

In this paper, an efficient method for multiuser detection of Code Division Multiple Access (CDMA) signals is proposed which provides soft output with remained noise distribution close to Gaussian. Therefore the proposed algorithm is efficient for both coded and uncoded signals. This algorithm is simulated for BPSK signals with random spreading. The performance of the receiver is analyzed in terms of Bit Error Rate (BER) of each user for under load, full load and overload conditions. Simulation results show that performance of the proposed algorithm is very close to optimum receiver for both coded and uncoded user signals, moreover, it also outperforms the previous proposed algorithms.

Keywords

code division multiple access; convergence of numerical methods; fading channels; interference suppression; iterative methods; multiuser detection; radio receivers; random sequences; BER; BPSK signals; CDMA signals; Gaussian noise distribution; coded signals; flat fading channel; interference cancellation technique; iterative detector; matched filter; multiple access interferences; multiuser detection; optimum receiver; random sequences; random spreading; smaller convergence area; soft output; synchronous transmission; uncoded signals; Binary phase shift keying; Bit error rate; Computational complexity; Decorrelation; Gaussian noise; Interference cancellation; Multiaccess communication; Multiple access interference; Multiuser detection; Wireless communication;

fLanguage

English

Publisher

ieee

Conference_Titel

Electronics, Circuits and Systems, 2003. ICECS 2003. Proceedings of the 2003 10th IEEE International Conference on

Print_ISBN

0-7803-8163-7

Type

conf

DOI

10.1109/ICECS.2003.1301869

Filename

1301869