| Communications Blockset™ | |
Analog Passband Modulation, in Modulation
The DSBSC AM Demodulator Passband block demodulates a signal that was modulated using double-sideband suppressed-carrier amplitude modulation. The input is a passband representation of the modulated signal. Both the input and output signals are real sample-based scalar signals.
In the course of demodulating, this block uses a filter whose order, coefficients, passband ripple and stopband ripple are described by the 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 is not suited to be placed inside a triggered subsystem.
The carrier frequency in the corresponding DSBSC 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.
DSB AM Demodulator Passband, SSB AM Demodulator Passband
| DSB AM Modulator Passband | DSBSC AM Modulator Passband | |
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