| 低压电力基于PLC的信道估计算法仿真 |
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| 引用本文： | 谭丹,丁少凡,王玲. 低压电力基于PLC的信道估计算法仿真[J]. 计算机仿真, 2012, 29(1): 98-101 |
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| 作者姓名： | 谭丹 丁少凡 王玲 |
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| 作者单位： | 1. 湖南大学电气与信息工程学院,湖南长沙,410082
2. 国防科技大学信息研究所,湖南长沙,410073 |
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| 摘 要： | 研究优化低压电力信道问题,针对低压电力线信道噪声污染严重,由于信道环境恶劣,造成误码率高。为了解决上述问题,采用OFDM系统中对低压电力信道的信道估计算法。传统LS(最小二乘法估计)算法复杂度低但性能受到限制,受噪声影响大。在综合考虑性能和复杂度,提出了新的改进的方法,并针对FFT的时域插值算法的缺陷,采用改进的算法进行仿真。仿真结果表明,改进算法使误码率降低,且减小了噪声的影响,证明信道估计算法提高了信噪比和估计的精度。
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| 关 键 词： | 正交频分复用 信道估计 最小二乘法估计 插值算法 低压电力信道 |
Analysis and Simulation of System Based on PLC |
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| TAN Dan , DING Shao-fan , WANG Ling. Analysis and Simulation of System Based on PLC[J]. Computer Simulation, 2012, 29(1): 98-101 |
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| Authors: | TAN Dan DING Shao-fan WANG Ling |
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| Affiliation: | 1 ( 1.College of Electrical and Information Engineering,Hunan University,Changsha Hunan 410082,China; 2.University of Defense Technology Information Institute,Changsha Hunan 410073,China ) |
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| Abstract: | Low-voltage power line channel has serious noise pollution and poor channel environment issues.Channel estimation algorithm was studied with OFDM system based on the power channel.Least squares estimation(LS) algorithm is of low complexity,but the performance is limited because noise impact.In comprehensive consideration of the performance and complexity,some new estimators for LS was proposed.Simultaneously,the shortcomings of the time domain FFT-based interpolation algorithm were analyzed,and an improved algorithm for the time domain FFT-based interpolation algorithm was presented.The simulation results show that the algorithm can improve the error rate,reduce the noise to some extent,and improve signal to noise ratio. |
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| Keywords: | OFDM Channel estimation Least squares estimation Interpolation algorithm PLC |
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