Open Access

Optimal Power Distribution Control for Multicode MC-CDMA with Zero-Forcing Successive Interference Cancellation

EURASIP Journal on Advances in Signal Processing20052005:906270

Received: 10 August 2003

Published: 20 April 2005


Multicarrier CDMA (MC-CDMA) has become a promising candidate for future wireless multimedia communications for its robustness to frequency-selective fading and its flexibility for handling multiple data rates. Among different multirate access schemes, multicode MC-CDMA is attractive for its high performance, good flexibility in rate matching, and low complexity. However, its performance is limited by self-interference (SI) and multiuser interference (MUI). In this paper a zero-forcing successive interference cancellation (ZF-SIC) receiver is used to mitigate this problem for multicode MC-CDMA. Furthermore, optimal power distribution control (PDC), which minimizes each user's bit error rate (BER), is considered. Our results show that, in correlated Rayleigh fading channels, the ZF-SIC receiver integrated with the optimal PDC dramatically improves the performance of the multicode MC-CDMA system in comparison to other receivers proposed in the literature. Moreover, the optimal PDC significantly outperforms the PDC based on equal BER criterion, particularly under a short-term transmit power constraint.

Keywords and phrases

multicodemulticarrier CDMAzero-forcingsuccessive interference cancellationpower distribution control

Authors’ Affiliations

Agere Systems
Centre Tecnològic de Telecomunicacions de Catalunya
Center for Communications and Signal Processing Research (CCSPR), Department of Electrical and Computer Engineering (ECE), New Jersey Institute of Technology (NJIT), University Heights


© Tan et al. 2005