Initial Synchronization Exploiting Inherent Diversity for the LTE Sector Search Process

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Title:	Initial Synchronization Exploiting Inherent Diversity for the LTE Sector Search Process
Authors:	林嘉慶;Lin, Jia-Chin;Sun, Yu-Ting;Poor, H. Vincent
Contributors:	資訊電機學院通訊工程學系
Keywords:	Computer simulation;Correlation;Correlators;Diversity;Estimation;frequency offset;Gain;Joints;matched filter (MF);maximum ratio combining (MRC);OFDM;Offsets;pseudo-noise (PN);Search process;sector search;Synchronism;Synchronization;Time measurements;Wireless communication
Date:	2016-02-01
Issue Date:	2026-04-23 13:02:55 (UTC+8)
Publisher:	Institute of Electrical and Electronics Engineers Inc.;New York: IEEE
Abstract:	摘要： This paper proposes an initial synchronization architecture for the sector search process in third-generation partnership project (3GPP) long-term evolution (LTE) communications. The proposed system, consisting of three techniques, takes intercell interference, intercarrier interference and multipath fading into consideration with assistance from inherent diversity. The outage and detection probabilities are derived by taking multisector diversity into account in the coarse timing alignment. The long-lag differential correlator can achieve approximately 4.7-dB signal-to-noise ratio (SNR) gain in primary synchronization sequence (PSS) acquisition probability. Joint estimation of the residual timing error and the fractional frequency offset is achieved by evaluating the short-lag autocorrelation at an orthogonal frequency division multiplexing (OFDM) symbol duration. Mean-square errors obtained via simulations are compared with the modified Cramér-Rao lower bounds derived here. The proposed technique can achieve approximately 6.9-dB SNR gain when it is compared with that assisted from the synchronization signalling. Joint detection of the integral frequency offset (IFO) and the sector identification (SID) is achieved by exploiting a frequency-domain (FD) matched filter (MF) to deal with frequency selectivity. Differential detection on a segmental FD MF is considered in frequency-selective environments. Computer simulations are conducted to verify that the proposed technique can achieve high IFO and SID detection probabilities. 其他題名： TWC 出版者： New York: IEEE 出版日期： 2016-02 出處： IEEE transactions on wireless communications, 2016-02, Vol.15 (2), p.1114-1128 資源來源： IEEE Electronic Library (IEL) 版權： Copyright The Institute of Electrical and Electronics Engineers, Inc. (IEEE) 2016 識別號： ISSN: 1536-1276 識別號： EISSN: 1558-2248 識別號： DOI: 10.1109/TWC.2015.2485262 識別號： CODEN: ITWCAX
Appears in Collections:	[Department of Communication Engineering] journal & Dissertation

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