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An Enhanced Frequency Synchronization Algorithm for 3GPP LTE FDD/TDD Dual Mode Downlink Receiver  

Shim, Myung-Jun (성균관대학교 정보통신공학부 통신시스템 연구실)
Jang, Jun-Hee (성균관대학교 정보통신공학부 통신시스템 연구실)
Choi, Hyung-Jin (성균관대학교 정보통신공학부 통신시스템 연구실)
Publication Information
The Journal of Korean Institute of Communications and Information Sciences / v.35, no.1C, 2010 , pp. 103-112 More about this Journal
Abstract
In this paper, we propose a coarse and fine frequency synchronization method which is suitable for the 3GPP(3rd Generation Partnership Project) LTE(Long Term Evolution) FDD(Frequency Division Duplexing) / TDD(Time Division Duplexing) dual mode system. In general, PSS(Primary Synchronization Signal) correlation based estimation method and CP(Cyclic Prefix) correlation based tracking loop are applied for coarse and fine frequency synchronization in 3GPP LTE OFDMA(Orthogonal Frequency Division Multiple Access) system, respectively. However, the conventional coarse frequency synchronization method has performance degradation caused by fading channel and squaring loss. Also, the conventional fine frequency synchronization method cannot guarantee stable operation in TDD mode because of signal power difference between uplink and downlink subframe. Therefore, in this paper, we propose enhanced coarse and fine frequency synchronization methods which can estimate more accurately in multi-path fading channel and high speed channel environments and has stable operation for TDD frame structure, respectively. By computer simulation, we show that the proposed methods outperform the conventional methods, and verify that the proposed frequency synchronization method can guarantee stable operation in 3GPP LTE FDD/TDD dual mode downlink receiver.
Keywords
3GPP LTE; OFDMA; PSS; synchronization; TDD;
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  • Reference
1 H. Nogami, T. Nagashima, "A Frequency and Timing Period Acquisition Technique for OFDM Systems," Proc. PIMRC'95, pp. 1010-1015, 1995.
2 D. Makrakis, P. T Mathiopoulos, and D. P Bouras, "Optimal decoding of coded PSK and QAM signals in correlated fast fading channels and AWGN: A combined envelope, multiple differential and coherent approach," IEEE Trans. Commun., Vol.42, pp.63-75, Jan. 1994.   DOI   ScienceOn
3 3GPP WG1, "TS 36.104 V8.6.0: Evolved universal terrestrial radio access (E-UTRA); Base Station (BS) radio transmission and reception," www.3gpp.org, 2009.
4 J. Armstrong, "Analysis of New and Existing Methods of Reducing Intercarrier Interference Due to Carrier Frequency Offset in OFDM," IEEE Trans. Comm., Vol.42, pp.2908-2914, 1994.   DOI   ScienceOn
5 J.J van de Beek, M. Sandell and P.O Borjesson, "On Synchronization in OFDM Systems Using the Cyclic Prefix," Proc. of RVK, pp.663-667, 1996.
6 3GPP WG1, "TS 36.211 V8.7.0: Evolved universal terrestrial radio access (E-UTRA); Physical channel and modulation," www.3gpp.org, 2009.
7 D. Makrakis and P.T Mathiopoulos, "Optimal Decoding in Fading Channels: A Combined Envelope, Multiple Differential and Coherent Detection Approach", in Proc. GLOBECOM'89, Dallas, TX, pp.1551-1557, Nov. 1989.
8 Y.H You, J.H Paik, C.H Park, M.C Ju, K.W Kwon, and J.W Cho, "Low-complexity Coarse Frequency-offset Synchronization for OFDM Applications," IEEE ICC 2001, Vol.8, pp. 2494-2498, 2001.