Commenced in January 2007
Paper Count: 30184
Coding based Synchronization Algorithm for Secondary Synchronization Channel in WCDMA
Abstract:A new code synchronization algorithm is proposed in this paper for the secondary cell-search stage in wideband CDMA systems. Rather than using the Cyclically Permutable (CP) code in the Secondary Synchronization Channel (S-SCH) to simultaneously determine the frame boundary and scrambling code group, the new synchronization algorithm implements the same function with less system complexity and less Mean Acquisition Time (MAT). The Secondary Synchronization Code (SSC) is redesigned by splitting into two sub-sequences. We treat the information of scrambling code group as data bits and use simple time diversity BCH coding for further reliability. It avoids involved and time-costly Reed-Solomon (RS) code computations and comparisons. Analysis and simulation results show that the Synchronization Error Rate (SER) yielded by the new algorithm in Rayleigh fading channels is close to that of the conventional algorithm in the standard. This new synchronization algorithm reduces system complexities, shortens the average cell-search time and can be implemented in the slot-based cell-search pipeline. By taking antenna diversity and pipelining correlation processes, the new algorithm also shows its flexible application in multiple antenna systems.
Digital Object Identifier (DOI): doi.org/10.5281/zenodo.1330181Procedia APA BibTeX Chicago EndNote Harvard JSON MLA RIS XML ISO 690 PDF Downloads 2005
 Y. E. Wang and T. Ottosson, "Cell search in W-CDMA". IEEE Journal on selected areas in communications, vol. 18, No. 8, pp 1470-1482, Augest 2000
 A. O. Nielsen and S. Korpela, "WCDMA initial cell search", Vehicular Technology Conference, 2000. IEEE VTS-Fall VTC 2000. 52nd vol. 1, pp. 377-383 Sept. 2000.
 K. Higuchi, M. Sawahashi, and F. Adachi, "Fast cell search algorithm in inter-cell asynchronous DS-CDMA mobile radio," IEICE Trans. Commun., vol. E81-B, no. 7, July 1998.
 K. Higuchi, M. Sawahashi, and F. Adachi, "Fast cell search algorithm using long code masking in DS-CDMA asynchronous cellar system" Tech. Rep. IEICE, pp57-62, Jan 1997.
 S. Sriram and S. Hosur, "Fast acquisition method for DS-CDMA systems," in Proc. 1999 IEEE Int. Conf. Commun., vol. 3, pp. 1928-1932, Vancouver, BC, Canada, June 1999.
 S. Sriram and S. Hosur. "Cyclically permutable codes for rapid acquisition in DS-CDMA systems with asynchronous base stations," IEEE J. Select. Areas Comininn., vol. 19, pp. 83-94, Jan. 2001.
 J. Nystrom, K. Jamal, Y. E. Wang, and R. Esmailzadeh, "Comparison of cell search methods for asynchronous wideband CDMA cellular system," in Proc. IEEE 1998 Int. Conf. Universal Personal Communications (ICUPC), vol. 2, , pp. 783-787, Florence, Italy, Oct. 1998.
 Moon Kyou Song and V.K. Bhargava, "Performance analysis of cell search in W-CDMA systems over Rayleigh fading channels". Vehicular Technology, IEEE Trans. vol. 51, pp. 749-759, July 2002.
 Y. E. Wang and T. Ottosson, "Cell search algorithms and optimization in W-CDMA," in Proc. 51th IEEE Vehicular Technology Conf. (VTC-00), Tokyo, Japan, May 15-18, 2000.
 K. Niu, Q. He and W. Wu, "Improvements on acquisition of secondary synchronization channel in W-CDMA", Info-tech and Info-net, 2001. Proceedings, Beijing. 2001 International Conferences, vol. 2, pp.632 - 641 Oct. 2001.
 V. Kuhn, Wireless Communications over MIMO Channels, John Wiley & Sons, 2006
 O. Shin and K. B. Lee, "Use of Multiple Antennas for DS/CDMA Code Acquisition", IEEE Transactions on Wireless Communications, vol.2, NO. 3, pp424-430, May, 2003.
 S. Brueck and I. Jami, "Impact of transmit diversity on cell search in UMTS" Personal Mobile Communications Conference, 5th European, pp. 266-270 April 2003.
 D. Liao and A. K. Elhakeem "MIMO based CDMA code acquisition in Rayleigh fading channels" Proceedings of the Eighth IASTED International Conference WOC2008 pp149-154, May 2008.
 3rd Generation Partnership Project, "Physical channels and mapping of transport channels onto physical channels (FDD)", 3GPP Technical Specification, TS 25.211, V5.5.0, Sep. 2003.
 3rd Generation Partnership Project, "Spreading and modulation (FDD)", 3GPP Technical Specification, TS 25.213, V5.5.0, Dec. 2003.
 3rd Generation Partnership Project, "FDD: Physical layer procedures", 3GPP Technical Specification, TS 25.214, V5.9.0, Jun. 2004.
 B. Sklar "Digital Communications: Fundamental and Applications Second Edition", Prentice Hall 2001.