LTE小区搜索中循环前缀类型判决和辅同步信号检测算法的改进

吉林大学学报(工学版) ›› 2012, Vol. 42 ›› Issue (02): 499-504.

LTE小区搜索中循环前缀类型判决和辅同步信号检测算法的改进

林雁, 乐光新, 尹长川

北京邮电大学信息与通信工程学院, 北京 100876

收稿日期:2010-12-13 出版日期:2012-03-01 发布日期:2012-03-01
作者简介:林雁(1978-),女,博士研究生.研究方向:下一代无线通信关键技术.E-mail:linyanyanlin@hotmail.com
基金资助:
国家自然科学基金项目(60472070;60672123);高等学校博士学科点专项科研基金项目(20050013005).

Improvement of CP type decision and SSS detection algorithm in cell search for LTE system

LIN Yan, YUE Guang-xin, YIN Chang-chuan

School of Information and Communication Engineering, Beijing University of Posts and Telecommunications, Beijing 100876, China

Received:2010-12-13 Online:2012-03-01 Published:2012-03-01

摘要/Abstract

摘要： 提出了一种LTE系统小区搜索中循环前缀类型判决和辅同步信号检测的改进算法。基于滑动窗,利用接收信号的序列相关和门限值判断循环前缀类型,避免循环前缀类型的盲检测;利用辅同步信号的偶数序列相关检测小区组标识号,在此基础上利用奇数序列验证检测结果,避免偶数序列和奇数序列的盲检测。仿真结果表明,本文算法在保证检测性能的同时降低了计算复杂度,提高了小区搜索的有效性,非常适合实际系统应用。

关键词: 通信技术, 主同步信号, 辅同步信号, 循环前缀, 滑动窗

Abstract: An improved Cyclic Prefix (CP) type decision and Secondary Synchronization Signal (SSS) detection algorithm in cell search for Long Term Evolution (LTE) system is proposed. To avoid CP type blind detection, sliding window correlation detection on receiving signals is adopted to decide CP type based on a pre-defined threshold. Instead of blind detection toward even-numbered signals and odd-numbered signals of SSS, the even-numbered signals are utilized to correlation detection first; then the odd-numbered signals are used to further verify the results detected by even-numbered signals. Simulation results show that the proposed algorithm effectively reduces the computational complexity without the diction performance degradation and is very suitable for application.

Key words: communication, primary synchronization signal, secondary synchronization signal, cyclic prefix, sliding window

中图分类号:

TN929.5

林雁, 乐光新, 尹长川. LTE小区搜索中循环前缀类型判决和辅同步信号检测算法的改进[J]. 吉林大学学报(工学版), 2012, 42(02): 499-504.

LIN Yan, YUE Guang-xin, YIN Chang-chuan. Improvement of CP type decision and SSS detection algorithm in cell search for LTE system[J]. 吉林大学学报(工学版), 2012, 42(02): 499-504.

参考文献

[1] 3GPP TS 36.211 v9.1.0. Physical Channel and Modulation[S].

[2] Tsai Ying-ming, Zhang Guo-dong, Grieco Donald, et al. Cell search in 3GPP long term evolution systems［J］. Vehicular Technology Magazine, 2007, 2(2): 23-29.

[3] Kim Ilgyu, Han Youngnam, Chung Hyun Kyu. An efficient synchronization signal structure for OFDM-based cellular systems［J］. IEEE Transactions on Wireless Communications, 2010, 9(1): 99-105.

[4] Tseng Pin-Kai, Wang Sen-Hung, Li Chih-Peng. A novel low complexity cell search scheme for LTE systems//Vehicular Technology Conference, Taipei, 2010.

[5] Mazarico J I, Capdevielle V, Feki A, et al. Detection of synchronization signals in reuse-1 LTE networks［J］. Wireless Days, 2009(15-17): 1-5.

[6] Kim Young Bum, Chang Kyung Hi. Complexity optimized CP length pre-decision metric for cell searcher in the downlink of 3GPP LTE system//Personal Indoor and Mobile Radio Communications, Tokyo,2009.

[7] Tsai Pei-Yun, Chang Hsiang-Wei. A new cell search scheme in 3GPP long term evolution downlink OFDMA systems//Wireless Communications & Signal Processing, Nanjing, China, 2009.

[8] Kim I, Han Y, Kim Y, et al. Sequence hopping cell search scheme for OFDM cellular systems［J］. IEEE Transactions on Wireless Communications, 2008, 7(5): 1483-1489.

[9] Tanno Motohiro, Nagata Satoshi, Kishiyama Yoshihisa. Physical channel structures and cell search method for scalable bandwidth for OFDM radio access in evolved UTRA downlink//IEEE Wireless Communications and Networking Conference, Kowloon, 2007.

[10] 3GPP TS 36.104 v9.3.0. Base Station Radio Transmission and Reception[S].

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