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

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

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

  1. 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

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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

CLC Number: 

  • TN929.5
[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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