| 一种适用于T-TCM系统的简化的Log-Map算法 |
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| 引用本文： | 王建,李建平.一种适用于T-TCM系统的简化的Log-Map算法[J].北京广播学院学报,2014(1):57-61. |
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| 作者姓名： | 王建 李建平 |
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| 作者单位： | 中国传媒大学 信息工程学院,北京100024 |
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| 摘 要： | 本文提出了一种适用于Turbo网格编码调制（ T-TCM）系统的简化Log-MAP算法，它可以轻松在硬件实现。我们探索了一种新的分段函数代替Log-MAP算法中的雅克比对数校正项，用这个方法可以损失很小的性能增益去简化Log-MAP算法。仿真结果证明我们的方法可以用非常低的复杂度实现和Log-MAP算法几乎相同的性能。此外，与S． Talakoub等人提出的improved MAX-Log-MAP算法相比，我们的算法降低了大约39%的复杂度，并且完全没有性能损失。
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| 关 键 词： | Log-MAP算法 简化Log-MAP算法 Turbo译码 |
A Simplified Log-MAP Algorithm for T-TCM Decoding |
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| WANG Jian,LI Jian-ping.A Simplified Log-MAP Algorithm for T-TCM Decoding[J].Journal of Beijing Broadcasting Institute(Science and Technology),2014(1):57-61. |
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| Authors: | WANG Jian LI Jian-ping |
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| Institution: | WANG Jian, LI Jian-ping |
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| Abstract: | A simplified decoding algorithm for turbo trellis-coded modulation （ T-TCM） is proposed, which is easy to implement in hardware. The algorithm exploits a new piece-wise function to replace the logarithmic term of the Jacobian logarithm based on the MacLaurin Series. Simulation results show that the proposed algorithm can archive log-MAP-similar decoding performance with a much lower computa-tional complexity. It can reduce about 40% of calculation in contrast to the improved MAX-Log-MAP. |
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| Keywords: | T-TCM Log-MAP T-TCM simplified Log-MAP Turbo decoding |
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