| 基于数据拟合的OFDM时变信道估计方法 |
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| 引用本文： | 段鹏,何明一,田野,薛敏彪. 基于数据拟合的OFDM时变信道估计方法[J]. 通信学报, 2010, 31(4): 122-127 |
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| 作者姓名： | 段鹏 何明一 田野 薛敏彪 |
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| 作者单位： | 1. 西北工业大学,电子信息学院,陕西,西安,710072
2. 大唐移动通信设备有限公司,系统工程部,北京,100083 |
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| 摘 要： | 利用周期伪随机(PN)序列频域能量集中在某些点上的特点,提出一种基于数据拟合的时变信道估计算法.该方法利用周期性PN序列的自相关特性,降低噪声和未知数据对导频的干扰;同时利用其周期性,实现对信道变化趋势的多点拟合;并在此基础卜利用信道时间平均值对估讣参数进行修正,以进一步提高估计精确性.仿真结果表明:与传统方法相比,该方法具有较优的误码率(BER)和均方误差(MSE)性能,尤其在低信噪比环境下性能改善显著.
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| 关 键 词： | 信道估计 时变信道 PN序列 数据拟合 |
Channel estimation method for time-vary channel based on data fitting in OFDM system |
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| DUAN Peng,HE Ming-yi,TIAN Ye,XUE Min-biao. Channel estimation method for time-vary channel based on data fitting in OFDM system[J]. Journal on Communications, 2010, 31(4): 122-127 |
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| Authors: | DUAN Peng HE Ming-yi TIAN Ye XUE Min-biao |
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| Affiliation: | DUAN Peng1,HE Ming-yi1,TIAN Ye 2,XUE Min-biao1 (1. School of Electrical , Information,Northwestern Polytechnic University,Xi'an 710072,China,2. System & St,ard Dept.,Datang Mobile Communications Equipment Co. Ltd,Beijing 100083,China) |
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| Abstract: | According that the energy of periodic sequence mainly concentrates on a few frequency points,based on data fitting,a novel periodic PN sequence time-vary channel estimation method was proposed. Utilizing the auto-correlation characteristic of PN sequence,the impact of interference on pilot could be reduced in time domain; meanwhile,the num-ber of the fitting data could be increased by using the periodicity character of pilots; based on time averaging value of channel,the estimation parameter could be adjust... |
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| Keywords: | OFDM OFDM:channel estimation time-vary channel PN sequence data fitting |
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