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Performance Analysis and Design of a WCDMA Mobile Station's Multi-path Searcher for Down-link with Multiple Transmit Antennas  

Kim Young Ju (School of Electronicl and Computer Engineering, Chungbuk National University)
Won Seung Hwan (School of Electronics and Computer Science, University of Southampton)
Kim En Ki (School of Electronicl and Computer Engineering, Chungbuk National University)
Lee Insung (School of Electronicl and Computer Engineering, Chungbuk National University)
Publication Information
Journal of the Institute of Electronics Engineers of Korea TC / v.43, no.1, 2006 , pp. 95-102 More about this Journal
Abstract
In this paper, we present the performance analysis and design of a multi-path searcher operating over Rayleigh fading channels when multiple transmit antennas are employed in the down-link of W-CDMA system. The simulation results for the receiver operating characteristics (ROC) for 1, 2, and 4 transmit antennas are presented to corroborate the theoretical analyses. We also propose a procedure to find the optimum parameters of double-dwell serial searcher according to the number of the multiple transmit antennas. Our analyses and simulations indicate that post-detection integration is not necessary when the number of transmit antennas is more than two. Finally, we found that increasing transmit diversity order does not necessarily improve the detection performance when the received pilot signal strength is relatively low. Therefore, this gives us a practical criterion on increasing transmit diversity order.
Keywords
multi-path searcher; transmit diversity; fading; W-CDMA;
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