| 基于软判决反馈的载波频偏估计方法 |
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| 引用本文： | 吴春航,李云,刘解华,吴彦奇.基于软判决反馈的载波频偏估计方法[J].电视技术,2015,39(3):81-83,88. |
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| 作者姓名： | 吴春航 李云 刘解华 吴彦奇 |
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| 作者单位： | 1. 重庆邮电大学移动通信技术重点实验室,重庆,400065
2. 北京华力创通科技股份有限公司,北京,100094 |
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| 基金项目： | 国家高技术研究发展计划(863计划)资助,课题编号2012AA01A509；国家科技重大专项课题(2013ZX03006003-002) |
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| 摘 要： | 卫星移动通信中,针对短突发独特字个数很少,传统的频偏估计性能差,导致载波跟踪性能严重下降的问题,提出了一种基于软判决反馈的载波频偏估计方案。在对接收短突发信号进行软判决反馈得到短突发信号的估计基础上,利用部分估计信号作为独特字,进行频偏估计,用于载波跟踪。仿真结果表明,提出的方案能较大地提高载波频偏估计性能。
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| 关 键 词： | 卫星移动通信 频偏估计 短突发 软判决反馈 |
| 收稿时间： | 2014/7/24 0:00:00 |
| 修稿时间： | 2014/10/21 0:00:00 |
Carrier frequency offset estimation Scheme Based on Soft Decision Feedbac |
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| Wu Chunhang,Li Yun,Liu Jiehua and Wu Yanqi.Carrier frequency offset estimation Scheme Based on Soft Decision Feedbac[J].Tv Engineering,2015,39(3):81-83,88. |
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| Authors: | Wu Chunhang Li Yun Liu Jiehua and Wu Yanqi |
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| Affiliation: | Key Lab of Mobile Communication Technology,Chongqing University of Posts and Telecommunications,Key Lab of Mobile Communication Technology,Chongqing University of Posts and Telecommunications,Hwa Create Corporation Ltd,Hwa Create Corporation Ltd |
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| Abstract: | At the situation that the short burst has a few unique word, so the conventional frequency offset estimation have poor performance, which deteriorate the performance of carrier tracking. Aiming at this problem, a carrier frequency offset estimation scheme based on soft decision feedback estimation in mobile satellite communication system is proposed. After on soft decision feedback estimation of the received short burst signal, part of the estimation signals are used as unique world for frequency offset estimation and carrier tracking. The simulation results show that the proposed scheme can improve the performance of carrier frequency offset estimation significantly. |
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| Keywords: | mobile satellite communication frequency offset estimation short burst soft decision feedback estimation |
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