| 一种基于PCC训练符号的OFDM信道估计算法 |
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| 引用本文： | 唐恬,姜军,张平.一种基于PCC训练符号的OFDM信道估计算法[J].北京邮电大学学报,2007,30(4):37-40. |
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| 作者姓名： | 唐恬 姜军 张平 |
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| 作者单位： | 北京邮电大学,电信工程学院,北京,100876;北京邮电大学,电信工程学院,北京,100876;北京邮电大学,电信工程学院,北京,100876 |
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| 摘 要： | 分析了正交频分复用(OFDM)信道估计中的信道冲激响应(CIR)泄漏问题，提出了一种新的时域信道估计算法. 使用多项式相消编码(PCC)训练符号进行信道估计，利用其频谱陡降的特点减少保护边带宽度，进而降低CIR泄漏. 与已有的OFDM信道估计算法进行了比较，仿真结果证明，该算法极大降低了信道估计均方误差(MSE)值，改善了系统误码率(BER)性能.
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| 关 键 词： | 正交频分复用 信道估计 多项式相消编码 |
| 文章编号： | 1007-5321（2007）04-0037-04 |
| 收稿时间： | 2006-06-18 |
| 修稿时间： | 2006-08-20 |
A Channel Estimation Algorithm for OFDM Based on PCC Training Symbols |
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| TANG Tian,JIANG Jun,ZHANG Ping.A Channel Estimation Algorithm for OFDM Based on PCC Training Symbols[J].Journal of Beijing University of Posts and Telecommunications,2007,30(4):37-40. |
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| Authors: | TANG Tian JIANG Jun ZHANG Ping |
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| Affiliation: | (School of Telecommunication Engineering, Beijing University of Posts and Telecommunications, Beijing 100876, China) |
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| Abstract: | The leakage of channel impulse response(CIR) in channel estimation for the orthogonal frequency division multiplexing(OFDM) systems is analyzed.A channel estimation algorithm in time domain is newly proposed.To overcome the leakage of CIR,the frequency guard bands are reduced by using the polynomial cancellation coding(PCC) training symbols.The symbols have fast spectral roll-off.Comparison has been done between the proposed algorithm and the existing channel estimation algorithms.Simulation results show the decreasing of channel estimation mean square(MSE) and the improvement of bit error rate(BER) performance by the proposed algorithm. |
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| Keywords: | orthogonal frequency division multiplexing channel estimation polynomial cancellation coding |
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