Performance analysis of adaptive power and rate control in wideband CDMA systems

Xue Wenhu; Gan Zhongmin

Volume 25 Issue 8

Aug. 2003

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Xue Wenhu, Gan Zhongmin . Performance analysis of adaptive power and rate control in wideband CDMA systems[J]. Journal of Electronics & Information Technology, 2003, 25(8): 1101-1107.

Citation:

Xue Wenhu, Gan Zhongmin . Performance analysis of adaptive power and rate control in wideband CDMA systems[J]. Journal of Electronics & Information Technology, 2003, 25(8): 1101-1107.

Xue Wenhu, Gan Zhongmin . Performance analysis of adaptive power and rate control in wideband CDMA systems[J]. Journal of Electronics & Information Technology, 2003, 25(8): 1101-1107.

Citation:

Xue Wenhu, Gan Zhongmin . Performance analysis of adaptive power and rate control in wideband CDMA systems[J]. Journal of Electronics & Information Technology, 2003, 25(8): 1101-1107.

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Performance analysis of adaptive power and rate control in wideband CDMA systems

Received Date: 2002-03-15
Rev Recd Date: 2002-09-23
Publish Date: 2003-08-19

Abstract

Abstract

In this paper, a novel adaptive power and rate control scheme is studied, the BER. (Bit Error Rate) formula for the wideband CDMA system with this scheme is derived, and the numerical results of performance analysis in flat fading and frequency-selective channels are given respectively. In this scheme, the transmit power and rate are adapted by the mobile based on the variations of the fading channel. Firstly the predicted Probability Distribution Function (PDF) is divided into several regions equally, and the threshold values among these regions are got. Then the thresholds are used in adaptive power and rate control in a way similar to the traditional power control technique. The numerical results show that the theoretical BER performance of wideband CDMA system can be improved effectively by this scheme.

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References(1)

References

L.B. Milstein, Wideband code division multiple access, IEEE J. on Select. Areas Commun.,2000, 18(8), 1344-1354.[2]C.C. Lee, R. Steele, Closed-loop power control in CDMA systems, IEE Proc. Communications,1996, 143(4), 231-239.[3]M. Sim, et al., Performance study of closed-loop power control algorithms for a cellular CDMA system, IEEE Trans. on Vehicular Tech., 1999, 48(3), 911-921.[4]S. Abeta, S. Sampei, N. Morinaga, Adaptive coding and processing gain control with channel activation for multimedia DS/CDMA systems, IEICE Trans. on Communications, 1997, E80B(4), 581-588.[5]T. Eyceoz, A. Duel-Hallen, H. Hallen, Deterministic channel modeling and long range prediction of fast mobile radio channels, IEEE Communication Letters, 1998, 2(9), 254-256.[6]J.G. Proakis 著, 张力军等译, 数字通信 (第三版), 北京, 电子工业出版社, 2001, 第 14 章, 536-552.

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