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PM Modulator Passband - Modulate using phase modulation

Library

Analog Passband Modulation, in Modulation

Description

The PM Modulator Passband block modulates using phase modulation. The output is a passband representation of the modulated signal. The output signal's frequency varies with the input signal's amplitude. Both the input and output signals are real sample-based scalar signals.

If the input is u(t) as a function of time t, then the output is

where f_c is the Carrier frequency parameter, θ is the Initial phase parameter, and K_c is the Modulation constant parameter.

An appropriate Carrier frequency value is generally 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.

Dialog Box

Carrier frequency (Hz)

The frequency of the carrier.

Initial phase (rad)

The initial phase of the carrier in radians.

Phase deviation

The phase deviation of the carrier frequency in radians. This is sometimes referred to as the "variation" in the phase.

Pair Block

PM Demodulator Passband

PM Demodulator Passband

PN Sequence Generator

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