| OFDM系统中TURBO码译码算法研究 |
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| 作者姓名： | 姚如贵 王永生 徐娟 |
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| 作者单位： | 西北工业大学电子信息学院 西安710072(姚如贵，王永生)，西北工业大学计算机学院 西安710072(徐娟) |
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| 基金项目： | 国防973项目(51308) |
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| 摘 要： | 研究多径衰落信道下TURBO编码OFDM系统的特性,推导出一种TURBO码在OFDM系统具体应用方式,得到OFDM系统中TURBO的译码算法。并从推导结果确定,平均信噪比和信噪比弥散度是影响系统性能的两个重要参数。仿真结果表明,与IEEE 802.11 A定义的物理层性能相比,采用提出的TURBO译码算法,可以提高整个系统性能,信噪比改善2.9DB;在大平均信噪比和小信噪比弥散度条件下,系统性能较好,误帧率较低。
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| 关 键 词： | OFDM TURBO码 平均信噪比 信噪比弥散度 |
New Algorithm for Turbo Decoding in OFDM System |
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| Authors: | Yao Rugui Wang Yongsheng Xu Juan |
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| Abstract: | Based on the research on the Turbo coded OFDM system in multipath fading channel,a new Turbo decoding algorithm for Turbo OFDM system is proposed.And from the algorithm,it is concluded that the mean and variance of signal-to-noise ratio are important to the performance.The simulation results show that the proposed algorithm can bring out about 2.9dB code gain over the scheme defined in IEEE 802.11a.The performance of the proposed algorithm is very good. |
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| Keywords: | OFDM Turbo code Mean of the signal-to-noise ratio Variance of signal-to-noise ratio |
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