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离散WV分布在FSK信号数字解调中的应用

冯小平;赵焕军;张林   

  1. (西安电子科技大学 电子对抗研究所,陕西 西安 China)

  • 收稿日期:1900-01-01 修回日期:1900-01-01 出版日期:2003-04-20 发布日期:2003-04-20

Application of discrete WVD to teh digital demodulation for FSK signal

FENG Xiao-ping;ZHAO Huan-jun;ZHANG Lin

  

  1. (Research Inst. of Electronic Countermeasures, Xidian Univ., Xi’an China, China)
  • Received:1900-01-01 Revised:1900-01-01 Online:2003-04-20 Published:2003-04-20

摘要: 提出了一种新的FSK信号数字化解调的方法,该方法基于信号的WVD分布,在时频二维平面上对FSK信号进行分析,利用统计方法估计信号的频率和码元宽度. 文中还给出了对一个8FSK信号进行数字化解调的仿真结果,并讨论了各种窗函数对解调性能的影响,给出了不同信噪比下的仿真结果及其与STFT方法的解调性能的比较.

关键词: FSK信号, Wigner-ville分布, 数字解调, 信噪比

Abstract: This paper presents a new digital demodulation method for the FSK signal, based on the Wigner-ville Transform. The FSK signal is discussed in the time-frequency plane, and the statistical methods are used to evaluate its frequency and code element width. A typical example about demodulation of 8FSK is given, and the effect of different windows is discussed. Finally the simulative results of this demodulation method under different signal-to-noise ratios(SNR) are presented and compared with the STFT demodulator.

Key words: FSK signa, WVD, digital demodulation, SNR

中图分类号: 

  • TN975