Howtosignalprocessing
- What is a complex envelope?
- What is envelope in communication?
- How does envelope detector work?
- What is bandpass waveform?
What is a complex envelope?
The complex envelope is just the low-pass part of the analytic signal. The analytic signal low-pass signal has been multiplied by the complex exponential at the carrier frequency.
What is envelope in communication?
Qualitatively, the envelope of a signal y( t ) is that boundary within which the signal is contained, when viewed in the time domain. It is an imaginary line. This boundary has an upper and lower part.
How does envelope detector work?
An envelope detector (sometimes called a peak detector) is an electronic circuit that takes a (relatively) high-frequency amplitude modulated signal as input and provides an output, which is the demodulated envelope of the original signal.
What is bandpass waveform?
A bandpass waveform has a spectral magnitude that is nonzero for frequencies in some band concentrated about a frequency f=+/- fc where fc is much greater than zero. Modulation is the process if imparting the source information.
