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新型OFDM前导符号频域结构与接收算法

Innovative Frequency Structure for OFDM Preamble Symbol and Its Receiving Algorithm
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摘要 对OFDM广播系统中前导符号的频域结构进行了研究,提出了一种固定序列和信令序列奇偶交错排列的新结构,其中固定序列可用于整数倍频偏估计和信道估计,信令序列用于承载信令内容。基于该结构,给出了一个前导符号频域的具体方案与参数。介绍了适用于该种结构的接收算法,并基于上述参数与算法进行了仿真试验。仿真结果表明,该种前导符号频域结构具有优异的检测与解码性能,能够适用于各类固定及移动场景。 Preamble symbol frequency structure of OFDM system is studied in this paper. A novel structure with interlaced fixed ＇ and signaling sequences is proposed, where the fixed sequence is mainly used for integer frequency offset （IFO） estimation and/or channel estimation, while signaling sequence is used to convey signaling information. A detailed design based on the structure is provided. Corresponding receiving algorithm is also discussed. The outstanding performance is proved by simulations and its future i implementation is promised.
作者 徐洪亮 何大治 张文军
机构地区 数字电视国家工程研究中心 上海交通大学
出处 《电视技术》 北大核心 2015年第17期92-95,共4页 Video Engineering
基金 国家自然科学基金项目(61420106008) 国家高技术研究发展计划项目(2013AA013503)
关键词 正交频分复用 前导符号 定时同步 恒包络零自相关 OFDM preamble time synchronization CAZAC
分类号 TN911 [电子电信—通信与信息系统]
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参考文献6

  • 1ETSI. EN 302 755, Digital video broadcasting (DVB): frame structure, channel coding and modulation tot a second generation digital tenstrial television broadcasting system (DVB-T2) [S]. 2012.
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二级参考文献9

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电视技术
2015年 第17期

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