The reconstruction signals were demodulated with Hilbert transform, and envelope spectrum at each band was obtained.
利用希尔伯特变换解调分析各频带信号，得到对应频带信号的包络谱；
2
In this paper, we have determined the relationship between the RMS bandwidth of the envelope of a narrow-band process and the RMS bandwidth of the process itself for a linear envelope detector.
本文确定了线性包络检波器窄带过程包络的均方根带宽与过程本身的均方根带宽之间的关系。
3
The offset quadrature phase-shift-keyed(OQPSK) is an effective digital constant envelope modulation for band-limited nonlinear channel.