Time and Frequency Synchronization for Multicarrier Transmission on Hexagonal Time-Frequency Lattice

被引：14
|
作者：
Xu, Kui [1 ]
Xu, Youyun [1 ]
Ma, Wenfeng [1 ]
Xie, Wei [1 ]
Zhang, Dongmei [1 ]
机构：
[1] PLA Univ Sci & Technol, Coll Commun Engn, Nanjing 210007, Jiangsu, Peoples R China
来源：
IEEE TRANSACTIONS ON SIGNAL PROCESSING | 2013年 / 61卷 / 24期
基金：
中国国家自然科学基金; 美国国家科学基金会;
关键词：
Cramer-Rao lower bound; multi-carrier transmission (MCT) on hexagonal time-frequency lattice; signal acquisition; time and frequency synchronization; MAXIMUM-LIKELIHOOD SYNCHRONIZATION; OFFSET ESTIMATION; OFDM SYSTEMS; JOINT ESTIMATION; TIMING OFFSET; PILOT SYMBOL; COMMUNICATION; SCHEME; DESIGN; ROBUST;
D O I：
10.1109/TSP.2013.2284153
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
In this paper, a novel synchronization acquisition approach, including preamble structure, time and frequency synchronization algorithms, is proposed for hexagonal multicarrier transmission (HMCT) system. Specifically, a novel signal acquisition scheme based on time-frequency subspace projection (TFSP) and its simplified form are proposed for reliable signal acquisition. Time and frequency synchronization is divided into three steps: 1) the coarse time offset (TO) and coarse fractional carrier frequency offset (CFO) estimation; 2) fine TO and integer CFO estimation; and 3) fine fractional CFO estimation. The closed-form Cramer-Rao lower bound of the proposed CFO estimation scheme is given. Theoretical analyses and simulation results show that the proposed preamble structure, time and frequency synchronization algorithms for HMCT system can obtain robust performance over doubly dispersive (DD) channel, and the simulation results show excellent agreement with theoretical analyses.
引用
收藏
页码：6204 / 6219
页数：16
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