Chapter 9Modulation and Demodulation

Data modulators, especially those intended to produce constant-envelope output signals, are “high-leverage” components in that even very small deviations from ideal in their behavior can lead to large degradations in overall system performance. Therefore, successful simulation of wireless communication systems depends upon the use of modulator models that capture all of the significant deviations from ideal behavior.

In the “usual” development of data modulation techniques as presented in most communications texts, the various techniques are presented in order of complexity, starting with the simplest. Thus BPSK would be presented first, then QPSK followed by m-PSK, and so on. Because of its relationship ...

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