Communications Blockset

MSK Modulator Baseband

Modulate using the minimum shift keying method

Library

CPM, in Digital Baseband sublibrary of Modulation

Description

The MSK Modulator Baseband block modulates using the minimum shift keying method. The output is a baseband representation of the modulated signal.

The Modulation index parameter times radians is the phase shift due to the latest symbol when that symbol is the integer 1. The Phase offset parameter is the initial phase of the output waveform, measured in radians.

Input Attributes

The input can be either a scalar or a frame-based column vector. If the Input type parameter is set to Integer, then the block accepts values of 1 and -1. If the Input type parameter is set to Bit, then the block accepts values of 0 and 1.

Upsampling the Modulated Signal

This block can output an upsampled version of the modulated signal. The Samples per symbol parameter is the upsampling factor. It must be a positive integer. For more information, see Upsampled Signals and Rate Changes in Using the Communications Blockset.

Dialog Box

Input type

Indicates whether the input consists of bipolar or binary values.

Phase offset (rad)

The initial phase of the output waveform.

Samples per symbol

The number of output samples that the block produces for each integer or bit in the input.

Pair Block

MSK Demodulator Baseband

See Also

CPM Modulator Baseband

References

[1]  Anderson, John B., Tor Aulin, and Carl-Erik Sundberg. Digital Phase Modulation. New York: Plenum Press, 1986.

MSK Demodulator Passband

MSK Modulator Passband