Demodulate DSB-AM-modulated data
Analog Passband Modulation, in Modulation
The DSB AM Demodulator Passband block demodulates a signal that was modulated using double-sideband amplitude modulation. The block uses the envelope detection method. The input is a passband representation of the modulated signal. Both the input and output signals are real scalar signals.
In the course of demodulating, this block uses a filter whose order, coefficients, passband ripple and stopband ripple are described by their respective lowpass filter parameters.
Typically, an appropriate Carrier frequency value is much higher than the highest frequency of the input signal. By the Nyquist sampling theorem, the reciprocal of the model's sample time (defined by the model's signal source) must exceed twice the Carrier frequency parameter.
This block works only with real inputs of type
double. This block does
not work inside a triggered subsystem.
The same as the Input signal offset parameter in the corresponding DSB AM Modulator Passband block.
The frequency of the carrier in the corresponding DSB AM Modulator Passband block.
The initial phase of the carrier in radians.
The method used to generate the filter. Available methods are Butterworth, Chebyshev type I, Chebyshev type II, and Elliptic.
The order of the lowpass digital filter specified in the Lowpass filter design method field .
The cutoff frequency of the lowpass digital filter specified in the Lowpass filter design method field in Hertz.
Applies to Chebyshev type I and Elliptic filters only. This is peak-to-peak ripple in the passband in dB.
Applies to Chebyshev type II and Elliptic filters only. This is the peak-to-peak ripple in the stopband in dB.