Getting Started

Building a Frequency-Shift Keying Model

Frequency-shift keying (FSK) is a standard modulation technique in which a digital signal is modulated onto a sinusoidal carrier whose frequency shifts between different values. The Bell Telephone System first used this technique in their Model 103 modem. The model shown in the following figure is an example of passband FSK.

FSK Model

This section explains how to

• Build the model
• Set parameters in the model
• Run the model

The section also explains

• Delays in the model and how to find the delay
• Multirate models
• Using sample time colors to check sample times

To open a completed version of the model, type fskdoc at the MATLAB prompt.

Using a Probe Block to Determine Symbol Period

Building the FSK Model