Browse > Article

Performance Analysis of Stepwise Parallel Processing for Cell Search in WCDMA over Rayleigh Fading Channels  

송문규 (원광대학교 전기전자 및 정보공학부 무선통신연구실)
Publication Information
The Journal of Korean Institute of Communications and Information Sciences / v.27, no.2B, 2002 , pp. 125-136 More about this Journal
Abstract
It is very important to acquire the synchronization in a intercell asynchronous WCDMA system, and it is carried out through the three-step cell search process. The cell search can operate in a stepwise parallel manner, where each step works in pipelined operation, to reduce the cell search time. In case that the execution time is set to be the same in each step, excessive accumulations will be caused in both step 1 and step 3, because step 2 should take at least one frame for its processing. In general, the effect of post-detection integration becomes saturated as the number of the accumulations increases. Therefore, the stepwise parallel scheme does not give much enhancement. In this paper, the performance of the stepwise parallel processing for cell search in WCDMA system is analyzed over Rayleigh fading channels. Through the analysis, the effect of cell search parameters such as the number of accumulations in each step and the power ratio allocated among channels is investigated. In addition, the performance of the stepwise parallel cell search is improved by adjusting the execution time appropriately for each step and is compared with that of the conventional stepwise serial processing.
Keywords
Citations & Related Records
연도 인용수 순위
  • Reference
1 K. Higuchi, M. Sawahashi, and F. Adachi, 'Fast Cell Search Algorithm in Inter-Cell Asynchronous DS-CDMA Mobile Radio,'IE1CE Trans. Commun., vol. E81-B, no. 7, Jul.1998
2 3GPP TSG-RAN WGl, 'Physical layer procedure (FDD),' TS 25.214 v3.2.0, ETSI, Mar 2000
3 3GPP TSG-RAN WGl, 'Spreading and Modulation (FDD),' TS 25.213 v3.2.0 ETSI Mar. 2000
4 박용서, 정영지, 송문규, '셀간 비동기 방식을 채용하는 DS-CDMA 이동무선 시스템에 대한 개선된 고속 셀 탐색 알고리즘', 한국통신학회논문지, 제24권, 제2호, 1999. 2
5 S. Sriram and S. Hosur, 'Cyclically Permutable Codes for Rapid Acquisition in DS-CDMA Systems with Asynchronous Base Stations,' IEEE Trans. J. Select. Areas Commum., vol. 19, no. 1, PP. 83-94, Jan. 2001   DOI   ScienceOn
6 Yi-Pin Eric Wang and Tony Ottosson, 'Cell Search in W-CDMA,' IEEE Trans. J. SeIect. Areas Commum., vol. 18, no 8, PP.1470-1481, Aug. 2000   DOI   ScienceOn
7 M. K. Simon, J. K. Omura, R. A. Scholtz and B. K. Levitt, Spread Spectrum Communication, Vol. III, ch. 1, Computer Science Press 1985
8 H. Park and B. Kang, 'On the performance of a Maximum-Likelihood Code-Acquisition Technique for Preamble Search in a CDMA Reverse Link,' IEEE Trans. Veh. Technol, vol. 47, no. 1, PP 65-74, Feb. 1998   DOI   ScienceOn
9 A. J. Viterbi, CDMA: Principtes of Spread Spectrum Communication, Addison-Wesley Publishing Co., ch 3, 1995
10 M. K. Song and V. K. Bhargava, 'Performance Analysis of Cell Search in W-CDMA Systems over Rayleigh Fading Channels,' accepted for publication in the IEEE Trans. Vehicular Technology