| Communications Toolbox | |
To modulate a signal using digital modulation with an alphabet having M symbols, start with a real message signal whose values are integers between 0 and M. Represent the signal by listing its values in a vector, x. Alternatively, you can use a matrix to represent a multichannel signal, where each column of the matrix represents one channel.
For example, if the modulation uses an alphabet with 8 symbols, then the vector [2 3 7 1 0 5 5 2 6]' is a valid single-channel input to the modulator. As a multichannel example, the two-column matrix
[2 3; 3 3; 7 3; 0 3;]
defines a two-channel signal in which the second channel has a constant value of 3.
| | Digital Modulation | Baseband Modulated Signals Defined | |
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