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工程科學(xué)與技術(shù):2013,45(1):158-163

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基于時頻分析的多載波2fsk技術(shù)在lplc通信中的應(yīng)用

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(福州大學(xué) 物理與信息工程學(xué)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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投稿時間：2012-06-20修訂日期：2012-12-05

中文摘要:為解決傳統(tǒng)二進(jìn)制頻移鍵控（2fsk）技術(shù)不適應(yīng)低壓電力線（lplc）信道頻率選擇性衰落特性的問題，結(jié)合離散短時傅立葉變換（dstft）和高階矩理論，提出一種新的可用于時頻分析的信噪比估計(jì)算法，在此基礎(chǔ)上實(shí)現(xiàn)了基于時頻分析的多載波2fsk信號的數(shù)字化解調(diào)。仿真結(jié)果表明信噪比估計(jì)精度可滿足lplc通信的實(shí)際需求，且在相同噪聲干擾情況下，多載波系統(tǒng)的誤碼率明顯低于單載波系統(tǒng)。

中文關(guān)鍵詞:

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 transbbbb 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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文章編號：201200469中圖分類號：文獻(xiàn)標(biāo)志碼：

基金項(xiàng)目:國家自然科學(xué)基金資助項(xiàng)目（60873186;61170147）；福建省教育廳科技項(xiàng)目（ja12024)；廈門科技計(jì)劃資助項(xiàng)目（3502z20123013）

引用文本：

徐藝文,陳忠輝,王衛(wèi)星.基于時頻分析的多載波2fsk技術(shù)在lplc通信中的應(yīng)用[j].工程科學(xué)與技術(shù),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.