Uplink Performance Evaluation of CDMA Communication System with RAKE Receiver and Multiple Access Interference Cancellation

Ayodeji J. Bamisaye, Michael O. Kolawole

.

DOI: 10.4236/ijcns.2010.36072                

Abstract

In CDMA communication systems, all the subscribers share the common channel. The limitation factor on the system’s capacity is not the bandwidth, but multiuser interference and the near far problem. This paper models CDMA system from the perspective of mobile radio channels corrupted by additive white noise generated by multipath and multiple access interferences. The system’s receiver is assisted using different combining diversity techniques. Performance analysis of the system with these detection techniques is presented. The paper demonstrates that combining diversity techniques in the system’s receivers markedly improve the performance of CDMA systems.

Keywords

CDMA, Multipath Diversity, Multiple Access Interference Cancellation, Rake Receiver, Parallel Interference Cancellation

Conflicts of Interest

The authors declare no conflicts of interest.

References

[1]	D. Torrieri, “Principle of Spread-Spectrum Communication Systems,” Springer Science + Business Media, Boston, 2005
[2]	R. Prasad, “Universal Wireless Personal Communications,” Artech House, 2000.
[3]	S. C. Yang, “CDMA RF system engineering”, Irvine, California, British Library Cataloguing in Publication Data, II. Series, TK5103.2.Y36, 1998.
[4]	A. J. Bamisaye, “Effect of Multiuser Interference on Subscriber Location in CDMA Network,” M Eng Thesis, Department of Electrical and Electronics Engineering, the Federal University of Technology, Akure, Nigeria, 2009.
[5]	A. J. Bamisaye and M. O. Kolawole, “Evaluation of Downlink Performance of a Multiple-Cell, Rake Receiver Assisted CDMA Mobile System,” Wireless Sensor Network Journals, Vol. 2, No. 1, 2010, pp. 1-6.
[6]	T. S. Rappaport, “Wireless Communications Principles & Practice,” IEEE Press, New York, Prentice-Hall, 2002.
[7]	M. Frikel, B. Targui, F. Hamon and M. M’Saad, “Adaptive Equalization Using Controlled Equal Gain Combining for Uplink/Downlink MC-CDMA Systems,” International Journal of Signal Processing, Vol. 4, No. 3, 2008, pp. 230-237.
[8]	A. Kansal, S. N. Batalama and D. A. Pados, “A Daptive Maximum SINR RAKE Filtering for DS-CDMA MultiPath Fading Channels,” IEEE Journal on selected area in communication, Vol. 16, No. 9, 1998, pp. 1765-1773.
[9]	T. Kim, K. Ko, Y. Kim and D. Hong, “Performance Evaluation of Uplink MC-CDMA Systems with Residual Frequency Offset,” IEICE Transactions on Communications, Vol. E89-B, No. 4, 2006, pp. 1455-1458.
[10]	K. Vardhe, D. Reynolds and M. C. Valenti, “The Performance of Multi-User Cooperative Diversity in an Asynchronous CDMA Uplink,” IEEE Transactions on Wireless Communications, Vol. 7, No. 2, 2008, pp. 1930- 1940.
[11]	X. B. Yu, X. D. Zhang, D. Z. Xu and G. G. Bi, “Uplink Performance of CWP-MC-CDMA with Space Diversity Combining Technique over Rayleigh Fading Channel,” Journal of Electronics, Vol. 23, No. 6, 2006, pp. 837-841.