Abstract : a software method of frequency - modulated signal demodulating based on wavelet packet is proposed in this paper . a variety of frequency - modulated signals are analyzed in time - frequency domain and the spectrograms are presented . this method can detect instantaneous frequency effectively and get frequency - modulated information , can be widely applied to dynamic testing and software radio 文摘:提出了基于小波包的調(diào)頻波解調(diào)方法,通過對各種調(diào)頻信號進(jìn)行時頻分析,給出了信號的時間?頻率譜圖,能有效地檢測到瞬時頻率和獲取調(diào)頻信息,該方法可廣泛應(yīng)用于動態(tài)測試和軟件無線電等領(lǐng)域。