We derive a compact formulation of the computational cutoff rate of binary differential phase shi... more We derive a compact formulation of the computational cutoff rate of binary differential phase shift keying (BDPSK) over a correlated Rayleigh fading channel. The analysis is more realistic than previous finite state Markov models of a fading channel
The purpose of this thesis is to develop a practical receiver for Rayleigh fadin?; channels. whic... more The purpose of this thesis is to develop a practical receiver for Rayleigh fadin?; channels. which does not exhibit the error floor found for conventional receivers in this channel. A model of a general time and frequency-selective channel is developed, and the opt.imal receiver structure for a time-selective channel is derived for general signalling. The theoretical performance of a standard and maximum likelihood receiver is analyzed for the case of f\Iary differential phase shift keying. A recursive, channel adaptive version of the optimal receiver is derived, and through simulation, its performance is compared to theoretical expectations . Results indicate that such a receiver will reduce the receiver error floor severnl orders of magnitude at typical channel signal-to-noise ratios.
Previous work on receivers suitable for correlated Rayleigh fading channels is examined. The anal... more Previous work on receivers suitable for correlated Rayleigh fading channels is examined. The analysis is generalized to complex signaling. It is demonstrated that the error performance of a standard receiver is weakly dependent on the structure of the fading process, and that an appropriate receiver may exploit this structure to give greatly improved performance. Two receiver structures, based on the classic estimator correlator derivation of Kailath, are considered. These structures are able to lower the error floor of a receiver in a correlated, Rayleigh fading channel. The performance limitation is found to be due to the form of the receiver used, rather than a fundamental channel capacity type of limit, and the appropriate receiver structure is able to virtually eliminate the asymptotic error. The performance of both standard and optimal receivers is examined analytically and verified through simulation.
We derive a compact formulation of the computational cutoff rate of binary differential phase shi... more We derive a compact formulation of the computational cutoff rate of binary differential phase shift keying (BDPSK) over a correlated Rayleigh fading channel. The analysis is more realistic than previous finite state Markov models of a fading channel
The purpose of this thesis is to develop a practical receiver for Rayleigh fadin?; channels. whic... more The purpose of this thesis is to develop a practical receiver for Rayleigh fadin?; channels. which does not exhibit the error floor found for conventional receivers in this channel. A model of a general time and frequency-selective channel is developed, and the opt.imal receiver structure for a time-selective channel is derived for general signalling. The theoretical performance of a standard and maximum likelihood receiver is analyzed for the case of f\Iary differential phase shift keying. A recursive, channel adaptive version of the optimal receiver is derived, and through simulation, its performance is compared to theoretical expectations . Results indicate that such a receiver will reduce the receiver error floor severnl orders of magnitude at typical channel signal-to-noise ratios.
Previous work on receivers suitable for correlated Rayleigh fading channels is examined. The anal... more Previous work on receivers suitable for correlated Rayleigh fading channels is examined. The analysis is generalized to complex signaling. It is demonstrated that the error performance of a standard receiver is weakly dependent on the structure of the fading process, and that an appropriate receiver may exploit this structure to give greatly improved performance. Two receiver structures, based on the classic estimator correlator derivation of Kailath, are considered. These structures are able to lower the error floor of a receiver in a correlated, Rayleigh fading channel. The performance limitation is found to be due to the form of the receiver used, rather than a fundamental channel capacity type of limit, and the appropriate receiver structure is able to virtually eliminate the asymptotic error. The performance of both standard and optimal receivers is examined analytically and verified through simulation.
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Papers by Wayne Dam