PM Demodulator Baseband (Communications Blockset)

Demodulate PM-modulated data

Library

Analog Baseband Modulation, in Modulation

Description

The PM Demodulator Baseband block demodulates a signal that was modulated using phase modulation. The input is a baseband representation of the modulated signal. The input is complex, while the output is real. The input must be a sample-based scalar signal.

This block uses a phase-locked loop containing a voltage-controlled oscillator (VCO). The VCO Gain parameter specifies the input sensitivity of the VCO.

In the course of demodulating, the block uses a filter whose transfer function is described by the Lowpass filter numerator and Lowpass filter denominator parameters.

Dialog Box

Initial phase (rad): The initial phase in the corresponding PM Modulator Baseband block.
Modulation constant (Radians per volt): The modulation constant in the corresponding PM Modulator Baseband block.
Lowpass filter numerator: The numerator of the lowpass filter transfer function. It is represented as a vector that lists the coefficients in order of descending powers of s.
Lowpass filter denominator: The denominator of the lowpass filter transfer function. It is represented as a vector that lists the coefficients in order of descending powers of s. For an FIR filter, set this parameter to 1.
VCO gain (Hertz per volt): The input sensitivity of the voltage-controlled oscillator.
Sample time: The sample time of the output signal.

Pair Block

PM Modulator Baseband

Phase Noise PM Demodulator Passband