| OFDM系统中迭代信道估计和解码研究 |
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| 引用本文： | 马章勇,刘雅然,赵春明,尤肖虎.OFDM系统中迭代信道估计和解码研究[J].电子与信息学报,2003,25(11):1441-1446. |
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| 作者姓名： | 马章勇 刘雅然 赵春明 尤肖虎 |
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| 作者单位： | 东南大学移动通信国家重点实验室,南京,210096 |
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| 基金项目： | 863-317-03-01-02-04-20/MⅡ-C3G-02-04-002 项目，东大通信技术有限公司资助 |
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| 摘 要： | 该文针对QPSK调制的OFDM系统，根据Turbo码的迭代解码原理，利用其软信息对信道估计的精度进行改进，同时为了防止由于解码器判决不准确造成误差的传播，提出了一种加权迭代估计算法，仿真结果表明，该方法与传统方法相比，能较显著地提高系统的性能。
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| 关 键 词： | 正交频分复用 Turbo码 软输入 软输出 SISO 迭代信道估计 信道解码 OFDM系统 |
| 收稿时间： | 2002-7-1 |
| 修稿时间： | 2002年7月1日 |
The joint inerative channel estimation and decoder algorithm for the ofdm system |
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| Ma Zhangyong,Liu Yaran,Zhao Chunming,You Xiaohu.The joint inerative channel estimation and decoder algorithm for the ofdm system[J].Journal of Electronics & Information Technology,2003,25(11):1441-1446. |
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| Authors: | Ma Zhangyong Liu Yaran Zhao Chunming You Xiaohu |
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| Affiliation: | National Mobile Communications Lab, Southeast University, Nanjing 210096, China |
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| Abstract: | For the QPSK-modulated OFDM system, the channel estimation accuracy can be improved using of the soft information which is based on the iterative decoder principle of Turbo. Meanwhile, in order to avoid serious error propagation due to the error decision of the decoder, the weighted iterative estimation algorithm is proposed. The simulation results show that the proposed algorithm improves the system performance dramatically compared with the conventional scheme. |
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| Keywords: | OFDM Turbo codes Soft In/Soft Out (SISO) Iterative channel estimation and decoding |
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