| 基于DSP实现的2FSK信号的解调 |
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| 引用本文： | 陈忠辉,冯心欣.基于DSP实现的2FSK信号的解调[J].福州大学学报(自然科学版),2010,38(4):548-551. |
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| 作者姓名： | 陈忠辉 冯心欣 |
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| 作者单位： | 福州大学物理与信息工程学院， 福建 福州 350108;福州大学物理与信息工程学院， 福建 福州 350108 |
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| 摘 要： | 提出了一种基于离散短时傅里叶变换解调2FSK信号的方法,通过在时域和频域联合二维空间上分析信号的时频特性,对接收信号在不同时间段的频谱进行分析,对接收码元进行同步捕获并在此基础上对接收信号进行判决,从而实现信号的解调.利用单片DSP芯片实现上述算法,配合一些外围电路构成一个完整的通信系统即可实现中低速率的电力线载波通信.
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| 关 键 词： | 2FSK信号 时频分析 解调 电力线载波通信 |
2FSK signal demodulation method based on DSP |
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| CHEN Zhong-hui and FENG Xin-xin.2FSK signal demodulation method based on DSP[J].Journal of Fuzhou University(Natural Science Edition),2010,38(4):548-551. |
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| Authors: | CHEN Zhong-hui and FENG Xin-xin |
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| Institution: | College of Physics and Information Engineering, Fuzhou University, Fuzhou, Fujian 350108, China;College of Physics and Information Engineering, Fuzhou University, Fuzhou, Fujian 350108, China |
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| Abstract: | A 2FSK demodulation method using discrete short-time fourier transform is presented. The time-frequency characteristics of 2FSK signal are discusses in both time and frequency domains, and the spectrum of signal in different time periods are compared. Therefore synchronization acquisition and demodulation can be implemented by spectrum analysis. The algorithm can be implanted to DSP. With peripheral circuits, a whole communication system used in low-rate powerline carrier environment is realized. |
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| Keywords: | 2FSK signal time-frequency analysis demodulation powerline carrier communication |
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