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提出了一种用于数字通信的位同步方法,它是基于脉宽调制技术的间接插入导频法。推导了脉宽调制处理后信号的功率谱密度。试验结果表明,脉宽调制处理后的信号的功率谱密度中含有码元同步信号。基于脉宽调制技术的位同步方法不仅适合于双极性信号传输,还适合于单极性信号传输。该技术具有简洁、可靠的特点。
A bit synchronization method for digital communication is proposed, which is an indirect insertion pilot method based on pulse width modulation. The power spectral density of the pulse-width modulated signal is deduced. The experimental results show that the power spectral density of the pulse-width modulated signal contains the symbol synchronization signal. The bit synchronization method based on pulse width modulation technology is not only suitable for bipolar signal transmission, but also suitable for unipolar signal transmission. The technology is simple and reliable.