| 基于功率谱相对值判决的多载波编码调制 |
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| 引用本文： | 王振朝,师洁,张俊林.基于功率谱相对值判决的多载波编码调制[J].电力系统及其自动化学报,2007,19(1):117-121. |
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| 作者姓名： | 王振朝 师洁 张俊林 |
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| 作者单位： | 河北大学电信学院,保定,071002 |
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| 基金项目： | 河北大学自然科学研究基金资助项目 |
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| 摘 要： | 针对低压配电网的信道特性及现有调制解调技术的局限性,提出基于功率谱相对值判决解调的多载波编码调制方案。方案采用多载波调制,接收端通过数字信号处理技术对接收信号进行功率谱估计,利用谱估计结果进行判决解调。在模拟的低压电力线载波信道条件下,对调制解调方案进行了仿真。结果证明方案能有效抑制多种噪声,且对信道具有较强的自适应能力。与传统的多载波调制技术比较,传输特性有明显改善(在高斯白噪声信道中误比特性能改善约4dB)。
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| 关 键 词： | 电力线通信 多载波编码调制 功率谱判决 仿真 |
| 文章编号： | 1003-8930（2007）01-0117-05 |
| 收稿时间： | 2005-11-22 |
| 修稿时间： | 2005-11-222006-02-13 |
Multi-carrier Coding Modulation Based on PSD Relative Judgment |
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| WANG Zhen-chao,SHI Jie,ZHANG Jun-lin.Multi-carrier Coding Modulation Based on PSD Relative Judgment[J].Proceedings of the CSU-EPSA,2007,19(1):117-121. |
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| Authors: | WANG Zhen-chao SHI Jie ZHANG Jun-lin |
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| Affiliation: | College of Electronic and Information Engineering, Hebei University, Baoding 071002, China |
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| Abstract: | Considering the channel characteristics of low-voltage distribution network and the limitation of modulation technology,a multi-carrier coding modulation scheme based on power spectral density relative judgment is presented in this paper.The scheme modulates data with multi-carrier,and the power spectral density of received signal is estimated using digital signal processing technology,then the data can be demodulated by judging the result.A low-voltage power line channel model is built for studying the transmission performance of the scheme.Simulation results prove that it can suppress various noise signals effectively.Compared with conventional multi-carrier modulation technology,the scheme has better performance on bit error rate. |
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| Keywords: | power line carrier multi-carrier coding modulation power spectral density(PSD) judgment simulation |
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