无线自组织通信中基于前导符号的定时同步

doi:10.3969/j.issn.1001-506X.2020.06.22

Abstract

Abstract:

The traditional auto-correlation-based timing synchronization and the cross-correlation-based timing synchronization have the disadvantage that the sidelobe of the correlation peak is too wide or the timing metric is sensitive to carrier frequency offset (CFO). Neither of them can meet the fast and accurate timing synchronization requirement of wireless ad hoc communication system. To address these issues, this paper proposes a new timing synchronization algorithm based on the improved cross-correlation. By splitting a long correlator into the product of two parallel sub-correlators, the new method makes the main peak sharper and the second peak lower. The sensitivity to CFO and computational complexity are theoretically analyzed. The Monte Carlo simulation results of the proposed and the traditional cross-correlation timing algorithm show that while remaining the complexity level the proposed method has a gain of 1.1 dB in terms of detection accuracy and the CFO robustness is better.

Key words: wireless ad hoc communication, timing synchronization, preamble symbol, cross-correlation

CLC Number:

TN92

Chen WANG, Fang WANG, Mingqi LI. Timing synchronization for wireless ad hoc communication based on preamble symbol[J]. Systems Engineering and Electronics, 2020, 42(6): 1372-1378.

Figures/Tables 13

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运算操作	实数乘	实数加
所提度量函数	2N(4N+6)	2N(4N+1)
传统互相关度量函数	2N(4N+2)	2N(4N+1)

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Timing synchronization for wireless ad hoc communication based on preamble symbol

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