Two candidate modulation schemes

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Reference no: EM131282489

A source of information emits a set of symbols denoted by

212_Equation 1.jpg

Two candidate modulation schemes, namely pulse-duration modulation (PDM) and pulse-position modulation (PPM), are considered for the electrical representation of this set of symbols. In PDM, the ith symbol is represented by a pulse of unit amplitude and duration (i/M)T.

On the other hand, in PPM, the ith symbol is represented by a short pulse of unit amplitude and fixed duration, which is transmitted at time t = (i/M)T.

Show that PPM is the only one of the two that can produce an orthogonal set of signals over the interval 0 £ t £ T.

Reference no: EM131282489

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