Table of Contents
- 1 Can we demodulate DSB-SC using envelope detector?
- 2 Can we use envelope detector for SSB demodulation?
- 3 Can DSBSC be detected non coherently with an envelope detector?
- 4 Can an envelope detector be used to demodulate a DSB-SC?
- 5 Why does the demodulated shape look different with synchronous and envelope detectors?
Can we demodulate DSB-SC using envelope detector?
Generally an envelope detector can’t be used to demodulate a DSB-SC. Demodulating a signal means to get back your original signal that was actually transmitted by any modulating techniques, or rather types. If the message is transmitted after modulating its amplitude, it’s called amplitude modulation.
How a modulating signal can be detected using envelope detector?
An envelope detector can be used to demodulate a previously modulated signal by removing all high frequency components of the signal. The capacitor and resistor form a low-pass filter to filter out the carrier frequency.
How do you demodulation DSB-SC signal?
For DSBSC, Coherent Demodulation is done by multiplying the DSB-SC signal with the carrier signal (with the same phase as in the modulation process) just like the modulation process. This resultant signal is then passed through a low pass filter to produce a scaled version of the original message signal.
Can we use envelope detector for SSB demodulation?
yes you can demodulate a DSB-SC signal using an envelope detector but with carrier reinsertion. Non-coherent detection process doesn’t need receiver to be phase locked with transmitted carrier.
Which type of modulation The envelope detector can be used with?
amplitude modulation (AM)
Envelope detection has numerous applications in the fields of signal processing and communications, one of which is amplitude modulation (AM) detection. Amplitude modulation (AM) is a modulation technique used in electronic communication, most commonly for transmitting information via a radio carrier wave.
What is coherent demodulation used for?
Coherent demodulation is also called synchronous demodulation and it is suitable for all the demodulation of linear modulation signals. The key to realize the coherent demodulation is to restore a coherent carrier that is strictly synchronized with the modulation carrier.
Can DSBSC be detected non coherently with an envelope detector?
Experiment AM Modulation shows how the envelope detector can be used to recover the original message from an AM signal i.e., demodulate it. Unfortunately, the envelope detector cannot be used to demodulate a DSBSC signal.
How do you use envelope detector in Matlab?
Envelope Detection Using MATLAB for Any time Domain Signal (Thorugh Hilbert Transform)
- envelope = abs(hilbert(Signal));
- clc; clear all; close all; Ac=2; \%carrier amplitude. fc=0.5; \%carrier frequency. Am=.5; \%message signal amplitude. fm=.05; \%message signal frequency. Fs=100; \%sampling rate/frequency.
- The result is:
How do you demodulate FM signals?
A simple and effective FM demodulation technique involves a high-pass filter (for FM-to-AM conversion) followed by an AM demodulator. A high-pass-filter-based FM demodulator is preceded by a limiter to prevent amplitude variations from contributing error to the demodulated signal.
Can an envelope detector be used to demodulate a DSB-SC?
Generally an envelope detector can’t be used to demodulate a DSB-SC. Demodulating a signal means to get back your original signal that was actually transmitted by any modulating techniques, or rather types.
How to detect and demodulate DSBSC wave?
The process of extracting an original message signal from DSBSC wave is known as detection or demodulation of DSBSC. The following demodulators (detectors) are used for demodulating DSBSC wave. Here, the same carrier signal (which is used for generating DSBSC signal) is used to detect the message signal.
What is the difference between envelope detector and product detector?
The envelope detector basically detects the amplitude of the signal. The product detector beats the incoming RF signal with a local oscillator (beat frequency oscillator or BFO) by use of a mixer, the result is an audio signal, the BFO frequency must be exactly the same as the RF signal carrier frequency.
Why does the demodulated shape look different with synchronous and envelope detectors?
The demodulated shape will be correct with the synchronous detector. With the envelope detector, the pulse will appear too narrow, and possibly too tall. This would have the effect on a picture of narrowing a vertical white line on the screen.