الفهرس 
AcknowledgmentOnly 14 pages are availabe for public view
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Abstract
The main subject of this thesis is to investigate the dependance of the error
probability on the effects of severe selective fading, for both binary frequency shift
keying (BFSK) and M-ary frequency shift keying (M-ary FSK) signals. Postedetection
diversity combining reception is assumed. Detailed expressions are derived for the
effect of fading induced ISI that is limited to both one-, and two-adjacent pluses. Four
examples of delay-power density spectrua (multipath intensity profiles) that cover most
of practical multipath fading channels are considered in the analysis. The four models
are; the Gaussian-, exponential-, triangular-, and rectangular delay power density
spectrum. Optimum noncoherent matched fllterreceiver is assumed and performance
.
results are given on the form error rate vis signal-to-noise ratio curves. The results are
presented• for different degree of selectivity of the fading channel and for the assumed
delay power sepectrum models. The results agree in the limits with the previously
,
published results which were based on the assumption of small degree of selectivity .
For highly selective channels the results show that the performance is highly
dependent on the shape of the delay power spectrum. For all degrees of selectivity
and for the different shapes of delay pOwer spectra, the use of diversity reception is
shown to be very effective in reducing the error rate specially when a high order of
diversity is used. M-ary signaling provides the use of longer symbol duration and thus
it effectively reduces the effects of channel dispersion.