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基于导频受限短突发通信的高精度快速频偏估计
袁静珍
0
(韩山师范学院 物理与电子工程学院,广东 潮州 521041)
摘要:
针对导频符号辅助调制(PSAM)的导频受限短突发通信载波同步,提出了一种高精度快速的频偏估计算法。其基本原理是:利用自相关算子得到具有较大估计范围和较低信噪比门限的联合自相关算法,再利用互相关算子获得具有高精度的简化互相关算法。理论分析和仿真结果表明,提出的算法能够消除大频偏,而且还具有较低的复杂度和良好的解调性能。
关键词:  短突发通信  载波同步  导频符号辅助调制  频偏估计
DOI:
基金项目:广东省教育部产学研结合项目(2012B091100288)
High accuracy and fast frequency offset estimation based on pilot-limited short burst communications
YUAN Jingzhen
(Department of Physics and Electronic Engineering,Hanshan Normal University,Chaozhou 521041,China)
Abstract:
For Pilot-Symbol-Assisted-Modulation(PSAM) based carrier synchronization in pilot-limited short-burst communications,a high accuracy and fast frequency offset estimation algorithm is proposed.Its basic principle is that,a joint auto-correlation algorithm is obtained using the auto-correlation operator with large range and low signal-to-noise ratio(SNR) threshold,and then a simplified cross-correlation algorithm with high accuracy is got by means of the cross-correlation operator.Theoretical analysis and simulation results show that the proposed algorithm can eliminate large frequency offset and has good demodulation performance with lower complexity.
Key words:  short-burst communication  carrier synchronization  pilot-symbol-assisted-modulation  frequency offset estimation
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