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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。
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.
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)
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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.