QAM is used to achieve greater spectrum efficiency. This is accomplished by utilizing both the amplitude and phase components to modulate, or alter, the waveform. In this scenario, the QAM waveform ...
classic case: where the carrier is a sine wave at some frequency many times higher than the frequency of the modulating signal, which is also a sine wave. Figure 7-3 illustrates the frequency spectrum ...
Correlative coding, or partial-response signaling (PRS) was introduced by Lender [Lender, 8.1] in the 1960s as a technique for data communication. The signaling method differs from the conventional ...
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