| 基于CMMB传输系统的粗符号定时同步算法 |
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| 引用本文： | 谢红,谭泽富.基于CMMB传输系统的粗符号定时同步算法[J].电视技术,2011,35(2):22-25. |
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| 作者姓名： | 谢红 谭泽富 |
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| 作者单位： | 重庆邮电大学通信与信息工程学院;重庆三峡学院物理与电子工程学院; |
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| 基金项目： | 重庆市教委科学技术研究项目(KJ091111) |
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| 摘 要： | 为了减少无线信道中存在的多径和频偏对中国移动多媒体广播(CMMB)系统传输信号同步的影响,结合CMMB标准协议规定的具体帧结构,分析了符号同步对系统的影响,讨论了传统最大似然(ML)算法的优缺点,并基于文献中的无数据辅助算法,提出了一种适合该系统并且复杂度较低的粗符号定时同步算法。仿真结果表明,在AWGN及多径信道环境下,新算法可以有效克服传统算法相关峰不明显的缺陷,其估计性能更好。
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| 关 键 词： | 中国移动多媒体广播 粗符号定时同步 正交频分复用 反向共轭对称 |
Coarse Symbol Timing Synchronization Algorithm for CMMB Transmission System |
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| XIE Hong,TAN Zefu.Coarse Symbol Timing Synchronization Algorithm for CMMB Transmission System[J].Tv Engineering,2011,35(2):22-25. |
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| Authors: | XIE Hong TAN Zefu |
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| Affiliation: | XIE Hong1,TAN Zefu1,2(1.College of Communication and Information Engineering,Chongqing University of Posts and Telecommunications,Chongqing 400065,China,2.College of Physics and Electronic Engineering,Chongqing Three Gorges University,Chongqing 404100,China) |
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| Abstract: | In order to reduce the influence for synchronization of signals in CMMB(China Mobile Multimedia Broadcasting) system,which caused by multi-path and frequency offset in wireless channel.This paper combined the specific frame structure of CMMB standard protocol,analyzed the impact of symbol synchronization,discussed advantages and disadvantages of the traditional Maximum Likelihood(ML) algorithm,and based on the non-data auxiliary algorithm in literature,proposed a coarse symbol timing synchronization algorit... |
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| Keywords: | CMMB coarse symbol timing synchronization OFDM conjugate symmetry |
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