| Communications Toolbox | |
In most media for communication, only a fixed range of frequencies is available for transmission. One way to communicate a message signal whose frequency spectrum does not fall within that fixed frequency range, or one that is otherwise unsuitable for the channel, is to alter a transmittable signal according to the information in your message signal. This alteration is called modulation, and it is the modulated signal that you transmit. The receiver then recovers the original signal through a process called demodulation.
The table shows how this section is organized.
For background information about modulation and demodulation, see the works listed in Selected Bibliography for Modulation.
| | Selected Bibliography for Convolutional Coding | Modulation Features of the Toolbox | |