The Anti-Integer-Frequency-Offset Initial Cell Search Algorithm in TDD-LTE Systems
作者: 黄诗晴 ：武汉理工大学通信与信息系统系;
Abstract: In LTE systems, the initial cell search process is completed by detecting the primary synchronization signal and the secondary synchronization signal. The searching results include cell ID group, symbol timing, frequency offset estimation, intra group cell ID and frame timing. However, if integer frequency offset presents in the received signal, due to time-domain phase rotation, the primary synchronization signal will be difficult to detected using the conventional correlation algorithm. A new joint detection method for integer frequency offset and primary synchronization signal is proposed, which can get the correct symbol timing even if the presence of integer frequency offset. Secondary synchronization signal is processed using the differential non-coherent correlation detection method. Simulations show that compared with the traditional matched filtering algorithms, it can effectively combat the channel delay spread and carrier frequency offset and especially suitable for the high-speed scenarios in synchronization of time division duplex LTE systems.
文章引用: 黄诗晴 (2011) TDD-LTE 系统中对抗整数倍频偏的小区初始搜索算法。 无线通信， 1， 1-5. doi: 10.12677/hjwc.2011.11001
 S. Sesia, I. Toufik, and M. Baker. LTE―The UMTS long term evolution from theory to practice. Buckinghamshire: John Wiley & Sons Ltd., 2009: 170-186.
 J.-I. Kim, J.-S. Han, and H.-J. Roh. SSS detection method for initial cell search in 3GPP LTE FDD/TDD Dual Mode Receiver. IEEE Conference: Communication and Information Technology ISCIT International Symposium on, 2009, 28: 199-203.
 王映民. TD-LTE技术原理与系统设计[M]. 北京: 人民邮电出版社, 2010: 35-68.
 I. Kim, Y. Han, and S. C. Bang. Sequence hopping cell search scheme for OFDM cellular systems. IEEE Transactions on Wireless Communications, 2008, 7(5): 1483-1489.
 3GPP TS 36.211 v9.1.0. Evolved Universal Terrestrial Radio Access (E-UTRA). Physical Channels and Modulation, 2010.
 D. Toumpakaris, J. Lee, and H.-L. Lou. Estimation of integer carrier frequency offset in OFDM systems based on the maximum likelihood principle. IEEE Transactions on Broadcasting, 2009, 55(1): 95-108.
 盛渊, 罗新民. LTE系统中小区搜索算法研究[J]. 通信技术, 2009, 42(3): 90-92.
 吴华, 曾凡鑫. LTE系统中互相关主同步理论研究[J]. 计算机工程与应用, 2010, 47(3): 94-96.