<p>This thesis examines the transmission and reception of coherent phase shift keyed signals (CPSK) over band-limited nonlinear satellite channels in a noisy environment. First, we analyzed the performance of M-ary CPSK signals transmitted over band-limited nonlinear satellite channels in the presence of uplink additive Gaussian noise and down-link additive Gaussian noise. An expression for evaluating the exact probability of error is derived for the case of a general satellite transponder model and then this expression is applied to specific transponder models to obtain numerical results.</p> <p>Secondly, we have derived bounds on the symbol error probability for binary CPSK signals transmitted over band-limited satellite channels in the presence of uplink and downlink thermal noise. These bounds can be evaluated using previously known error probabilities for wideband channels. Numerical results are evaluated and compared with those results computed using the exact error probability expressions. The advantage of these bounds is that they can be evaluated knowing only the peak value and variance of the intersymbol interference (ISI), and the bounds appear to yield reasonably accurate approximations to the exact error probabilities when ISI is not too large. Also, a computationally efficient technique is derived to evaluate the error probabilities for binary CPSK signals transmitted over a wideband piece-wise smooth saturating channels.</p> <p>Finally, the optimal reception of binary CPSK signals over band-limited nonlinear satellite channels is investigated. A receiver structure, similar to a decision feedback receiver for linear channels, is derived to combat the ISI effect. The performance is evaluated by computer simulation techniques and it is shown that the receiver performs significantly better than the single sample sign detector. Also, it is shown that the single sample sign detector yields optimum decisions for wideband hard-limited channels.</p> / Doctor of Philosophy (PhD)
| Identifer | oai:union.ndltd.org:mcmaster.ca/oai:macsphere.mcmaster.ca:11375/11689 |
| Date | 09 1900 |
| Creators | Ekanayake, Nimal |
| Contributors | Taylor, D.P., Electrical Engineering |
| Source Sets | McMaster University |
| Detected Language | English |
| Type | thesis |
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