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工程科学与技术:2013,45(1):158-163

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基于时频分析的多载波2fsk技术在lplc通信中的应用

,,

(福州大学 物理与信息工程学院)

multi-carrier 2fsk technology based on time-frequency analysis for lplc communication

,,

(school of physics and info. eng.,fuzhou univ.)

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投稿时间：2012-06-20修订日期：2012-12-05

中文摘要:为解决传统二进制频移键控（2fsk）技术不适应低压电力线（lplc）信道频率选择性衰落特性的问题，结合离散短时傅立叶变换（dstft）和高阶矩理论，提出一种新的可用于时频分析的信噪比估计算法，在此基础上实现了基于时频分析的多载波2fsk信号的数字化解调。仿真结果表明信噪比估计精度可满足lplc通信的实际需求，且在相同噪声干扰情况下，多载波系统的误码率明显低于单载波系统。

中文关键词:

abstract:the traditional binary frequency shift keying (2fsk) technology cannot adapt to the attenuation characteristic of low-voltage power line carrier (lplc) channel.in order to solve this problem, by using discrete short time fourier transform and high-order moments theory,a novel signal-to-noise estimation algorithm,which can be used in time-frequency analysis,was proposed. based on it,a multi-carrier binary frequency shift keying technique based on time-frequency analysis was implemented.simulation results showed that the precision of the snr estimation could meet the need of the lplc communication system in practice and the multi-carrier system gains lower error rate than the single-carrier system while they are interfered by the same noise.

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文章编号：201200469中图分类号：文献标志码：

基金项目:国家自然科学基金资助项目（60873186;61170147）；福建省教育厅科技项目（ja12024)；厦门科技计划资助项目（3502z20123013）

引用文本：

徐艺文,陈忠辉,王卫星.基于时频分析的多载波2fsk技术在lplc通信中的应用[j].工程科学与技术,2013,45(1):158-163.

xu yiwen,chen zhonghui,wang weixing.multi-carrier 2fsk technology based on time-frequency analysis for lplc communication[j].advanced engineering sciences,2013,45(1):158-163.