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BER Performance Analysis of Multistage PIC Scheme in An Asynchronous DS-CDMA System with Long Scrambling Codes

Pei Xiao (Institutionen för signaler och system, Kommunikationssystem) ; Erik G. Ström (Institutionen för signaler och system, Kommunikationssystem)
IEEE 59th Vehicular Technology Conference, 2004. VTC 2004-Spring, Milan, Italy, 17-19 May 2004 Vol. 2 (2004), p. 952 - 957.
[Konferensbidrag, refereegranskat]

In this paper, we tackle the problem of theoretical evaluation for the multistage parallel interference cancellation (PIC) scheme in a DS-CDMA system with orthogonal modulation and long scrambling codes. The studied system operates on the reverse link in a time-varying multipath Rayleigh fading channel. By applying the Central Limit Theorem to multiple access interference (MAI) and intersymbol interference (ISI), as well as identically distributed chips from a single interferer, the bit error rate (BER) performance of the PIC scheme at any stage can be recursively computed from the signal-to-noise ratio, number of users, the number of paths per user, processing gain of the CDMA system, as well as the average received power of each path. The proposed approximative analysis is validated by the Monte-Carlo simulations and proved to be accurate, and it gives insight into the performance and capacity one can expect from the PIC based receivers under different situations.

Nyckelord: Hadamard codes, Monte Carlo methods, Rayleigh channels, code division multiple access, error statistics, interference suppression, intersymbol interference, multipath channels, spread spectrum communication, time-varying channels



Denna post skapades 2006-09-12. Senast ändrad 2013-06-12.
CPL Pubid: 15197

 

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Institutioner (Chalmers)

Institutionen för signaler och system, Kommunikationssystem (1900-2017)

Ämnesområden

Information Technology

Chalmers infrastruktur