Performance Analysis of Closed Loop Transmit Diversity for WCDMA Systems in a Time Variant Fading Channel

Yang Xin; Li Jin; You XiaoHu

Volume 27 Issue 9

Sep. 2005

Turn off MathJax

Article Contents

Article Navigation > Journal of Electronics & Information Technology > 2005 > 27(9): 1441-1445

Yang Xin, Li Jin, You XiaoHu. Performance Analysis of Closed Loop Transmit Diversity for WCDMA Systems in a Time Variant Fading Channel[J]. Journal of Electronics & Information Technology, 2005, 27(9): 1441-1445.

Citation:

Yang Xin, Li Jin, You XiaoHu. Performance Analysis of Closed Loop Transmit Diversity for WCDMA Systems in a Time Variant Fading Channel[J]. Journal of Electronics & Information Technology, 2005, 27(9): 1441-1445.

Citation:

PDF( 1053 KB)

Performance Analysis of Closed Loop Transmit Diversity for WCDMA Systems in a Time Variant Fading Channel

Received Date: 2004-04-02
Rev Recd Date: 2004-11-08
Publish Date: 2005-09-19

Abstract

Abstract

In this paper, the closed loop transmit diversity technique is investigated. The RAKE receiver model and the weighting vector algorithm are presented. Since the feedback delay in the practical systems has considerable effect on the receiver performance of the closed loop transmit diversity technique, the performance of the RAKE receiver with feedback delay in the time variant wireless channel is analyzed and compared with that of the open loop mode. Theoretical analysis and simulation results show that the closed loop transmit diversity technique outperforms the open loop technique in the environments with low speeds and low path signal-to-noise ratios.

FullText(HTML)

References(1)

References

Tarokh V, Seshadri N, Calderbank R. Space-time codes for high data rate wireless communications: performance criterion and code construction[J].IEEE Trans. on Info. Theory.1998, 44(3):744-[2]3GPP, TSG RAN, WG1, Physical Layer Procedures (FDD), June,2000.[3]Derryberry R T, Gray S D, Ionescu D M, Mandyam G,Raghothaman B. Transmit diversity in 3G CDMA systems. IEEE Communications Magazine, 2002, 40(4): 68 - 75.[4]Hamalainen J, Wichman R. Closed-loop transmit diversity for FDD WCDMA systems. 34th Asilomar Conference on Signals,Systems and Computers, Pacific Grove, CA, USA, 29 Oct.-1 Nov.,2000, vol. 1: 111 - 115.[5]Da Silva M J, Taffin A, Lasaulce S, Buljore S. Closed loop transmit diversity enhancements for UMTS narrowband and wideband TD-CDMA. IEEE Veh. Technol. Conference, 2001.Spring, 2001, vol.3:1963 - 1967.[6]Nagaraj S, Huang Yih-Fang. Downlink transmit diversity:feedback efficiency and robustness. IEEE International Conference on Personal Wireless Communications, Hyderabad,India, 17-20 Dec., 2000: 14- 18.[7]Onggosanusi E N, Gatherer A, Dabak A G, Hosur S. Performance analysis of closed-loop transmit diversity in the presence of feedback delay[J].IEEE Trans. on Commun.2001, 49(9):1618-[8]Hwang Keun Chul, Lee Kwang Bok. Efficient weight vector representation for closed-loop transmit diversity. IEEE ICC 2002,New York, NY, USA, 2002, vol. 2:732 - 736.[9]Raghothaman B, Mandyam G, Derryberry R T. Performance of closed loop transmit diversity with feedback delay. 34th Asilomar Conference on Signals, Systems and Computers, Pacific Grove,CA, USA, 29 Oct.-1 Nov., 2000, vol.1: 102 - 105.[10]Hamalainen J, Wichman R. The effect of feedback delay to the closed-loop transmit diversity in FDD WCDMA. IEEE PIMRC2001, San Diego, CA, USA, 2001 vol.1: D-27 - D-31.[11]Papoulis A. Probability, Random Variables, and Stochastic Processes. New York: McGraw-Hill, Inc. 1991:86 - 124.[12]杨馨,董霄剑,尤肖虎.WCDMA系统发送分集技术的性能分析.电子学报,2002,30(7):986-989.

Relative Articles

Supplements(0)

Cited By

Proportional views