| 动态多径信道DTMB频偏估计算法 |
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| 引用本文： | 周鹏,汪晓曦,陈伟,黄铁.动态多径信道DTMB频偏估计算法[J].华中科技大学学报(自然科学版),2011(5):92-95. |
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| 作者姓名： | 周鹏 汪晓曦 陈伟 黄铁 |
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| 作者单位： | 武汉理工大学信息工程学院;上海明波通信技术有限公司; |
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| 基金项目： | 核心电子器件、高端通用芯片及基础软件产品专项基金资助项目(2009ZX01033-003-001) |
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| 摘 要： | 针对在动态多径信道条件下残余频偏波动较大、难以获得高估计精度及大估计范围的问题,提出一种应用于数字电视地面多媒体广播(DTMB)系统频偏估计的改进算法.根据DTMB标准中相位旋转的初始相位规律,尽可能使参与相关运算的2段伪噪声序列数据一样,从而使系统可较容易地选出多条径参与偏频的计算,达到频偏估计的多径合成效果.多径信道下的仿真结果证明:该算法提高了动态载波恢复模块的工作稳定性,延长了系统锁定时间,系统残余频偏绕中心±10Hz以内波动,改善了系统频偏估计性能.
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| 关 键 词： | 数字电视地面多媒体广播 伪随机序列 频偏估计 多径合成 延迟长度 |
Frequency offset estimation for DTMB in dynamic multi-path channel |
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| Zhou Peng Wang Xiaoxi Chen Wei Huang Tie.Frequency offset estimation for DTMB in dynamic multi-path channel[J].JOURNAL OF HUAZHONG UNIVERSITY OF SCIENCE AND TECHNOLOGY.NATURE SCIENCE,2011(5):92-95. |
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| Authors: | Zhou Peng Wang Xiaoxi Chen Wei Huang Tie |
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| Institution: | Zhou Peng1 Wang Xiaoxi1 Chen Wei1 Huang Tie2(1 School of Information Engineering,Wuhan University of Science and Technology,Wuhan430074,China,2 Bwave Communication Technology Co.Ltd.in Shanghai,Shanghai 201203,China) |
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| Abstract: | For the low performance of frequency offset estimatio n module in the dynamic multi-path channel and the difficulty of improving the es timation accuracy and broadening the scope of frequency offset estimation,an al gorithm of frequency offset estimation in digital television terrestrial multime dia broadcasting(DTMB) system was proposed.The main research work was the disc overy of the rules of preliminary phase of frame head in phase shift mode utiliz ing the rules to optimize the fluctuation of frequency ... |
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| Keywords: | digital television terrestrial multimedia broa dcasting(DTMB) pseudo-nosie(PN) sequence frequency offset estimation multi-path synthesization delay length |
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