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Báo cáo hóa học: " Optimal Power Distribution Control for Multicode MC-CDMA with Zero-Forcing Successive Interference Cancellation"

Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành hóa học dành cho các bạn yêu hóa học tham khảo đề tài: Optimal Power Distribution Control for Multicode MC-CDMA with Zero-Forcing Successive Interference Cancellation | EURASIP Journal on Applied Signal Processing 2005 5 718-729 2005 Hindawi Publishing Corporation Optimal Power Distribution Control for Multicode MC-CDMA with Zero-Forcing Successive Interference Cancellation Mizhou Tan Agere Systems 1110 American Parkway NE Allentown PA 18109 USA Email mtan@agere.com Christian Ibars Centre Tecnol Ogic de Telecomunicacions de Catalunya C Gran Capita 2-4 08034 Barcelona Spain Email christian.ibars@cttc.es Yeheskel Bar-Ness Center for Communicationsand Signal Processing Research CCSPR Department of Electrical and Computer Engineering ECE New Jersey Institute of Technology NJIT University Heights Newark NJ 07102 USA Email barness@yegal.njit.edu Received 10 August 2003 Revised 11 March 2004 Multicarrier CDMA MC-CDMA has become a promising candidate for future wireless multimedia communications for its robustness to frequency-selective fading and its flexibility in 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 with 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 multicode multicarrier CDMA zero-forcing successive interference cancellation power distribution control. 1. INTRODUCTION Multicarrier CDMA MC-CDMA .