This thesis describes new techniques of detection and fast start-up channel estimation for
transmitting digital data over a fast 'frequency-selective' fading channel of the type
encountered in fading mobile communications.
The model of the channel involves a large number of reflected signals delayed in time by
different amounts and reaching the receiver via different paths, each of which is represented
by an independent Rayleigh fading channel. Such a model gives rise to frequency-selective
fading and an appreciable degree of intersymbol interference. Base bend representation of
the quadrature amplitude modulated data transmission system is first studied. [Continues.]
A Doctoral Thesis. Submitted in partial fulfilment of the requirements for the award of Doctor of Philosophy at Loughborough University.