SSS detection method for initial cell search in 3GPP LTE FDD/TDD dual mode receiver

In 3GPP Long Term Evolution (LTE) system, initial cell search procedure comprises two steps using primary synchronization signal (PSS) and secondary synchronization signal (SSS). This paper presents SSS detection method for second step of initial cell search. In general, coherent detection using estimated channel frequency response (CFR) at PSS is used for SSS detection, but performance degradation is occurred by difference of channel between PSS and SSS in time division duplex (TDD) mode. Thus we propose non-coherent detection using partial correlation and differential correlation. Moreover, we consider cyclic-prefix (CP) detection algorithm that uses CP and its repetition part of data symbol, and we investigate influence of CP detection in SSS detection process.

[1]  Young-Hwan You,et al.  Low-complexity coarse frequency-offset synchronization for OFDM applications , 2001, ICC 2001. IEEE International Conference on Communications. Conference Record (Cat. No.01CH37240).

[2]  K. Pushpa,et al.  Estimation of frequency offset, cell ID and CP length in OFDMA mode of WMAN , 2008, TENCON 2008 - 2008 IEEE Region 10 Conference.

[3]  Jinkang Zhu,et al.  Improved coarse frequency synchronization algorithm with extended differential detection , 2003, 2003 IEEE Wireless Communications and Networking, 2003. WCNC 2003..

[4]  Mamoru Sawahashi,et al.  Investigation on Transmit Diversity for Synchronization Channel in OFDM Based Evolved UTRA Downlink , 2008, 2008 IEEE 68th Vehicular Technology Conference.

[5]  Il-Gyu Kim,et al.  Efficient coherent neighbour cell search for synchronous 3GPP LTE system , 2008 .

[6]  Gerard O'Regan.  Texas Instruments , 1964, Nature.