Estimation and filtering for digital signals

This thesis is concerned with the estimation of the sampled impulse response of a time-varying HF channel, over a synchronous serial data transmission system, using quaternary phase shift keyed signals operating at 2400 bauds, with an 1800 Hz carrier. It is also concerned with the adjustment of a linear filter ahead of a near maximum likelihood detector, to make the channel minimum phased, and hence remove phase distortion introduced over telephone channels for a 16 QAM data transmission system operating at 9600 bits/s. [Continues.]