| 基于TTCM的联合编码调制算法 |
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| 引用本文： | 郭东亮,束锋,吴乐南. 基于TTCM的联合编码调制算法[J]. 电子学报, 2003, 31(7): 1092-1094 |
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| 作者姓名： | 郭东亮 束锋 吴乐南 |
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| 作者单位： | 东南大学无线电工程系,江苏南京 210096 |
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| 基金项目： | 国家自然科学基金 (No 60 0 72 0 1 3) |
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| 摘 要： | 提出了一种具有高频带利用率和高重建质量的联合编码调制算法.采用Turbo码网格编码调制TTCM作为编码调制(CM)方案,按"最小化端到端失真"准则最优化设计信源解码器,直接利用TTCM解码输出的软判决值进行信源译码.仿真表明,相对于硬判决分离译码,本文算法将重建信号的信噪比提高了约2dB.
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| 关 键 词： | Turbo码网格编码调制 端到端失真 软判决译码 |
| 文章编号： | 0372-2112(2003)07-1092-03 |
| 收稿时间： | 2002-02-05 |
Joint Source /Channel Coding Modulation Algorithm Based on TTCM |
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| GUO Dong-liang,SHU Feng,WU Le-nan. Joint Source /Channel Coding Modulation Algorithm Based on TTCM[J]. Acta Electronica Sinica, 2003, 31(7): 1092-1094 |
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| Authors: | GUO Dong-liang SHU Feng WU Le-nan |
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| Affiliation: | Dept.of Radio Engineering,Southeast University,Nanjing,Jiangsu 210096,China |
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| Abstract: | A joint source/channel coding modulation algorithm based on TTCM (Turbo Trellis-Coded Modulation) is presented,which achieve bandwidth-efficient and high reconstructive quality.The source decoder is optimized by minimizing the end-to-end system distortion.The soft output values of TTCM decoder are applied directly to the designed optimal source decoder.Simulation results show that compared with the system with hard decoding,the proposed algorithm can objectively gain 2 dB improvement of decoded source in terms of SNR. |
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| Keywords: | Turbo trellis-coded modulation end-to-end distortion soft-decision decoding |
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