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(guò)對(duì)各種調(diào)頻信號(hào)進(jìn)行時(shí)頻分析,給出了信號(hào)的時(shí)間?頻率譜圖,能有效地檢測(cè)到瞬時(shí)頻率和獲取調(diào)頻信息,該方法可廣泛應(yīng)用于動(dòng)態(tài)測(cè)試和軟件無(wú)線電等領(lǐng)域。