Cosine Signals Research Articles

Implementation of digital matched filters in data receivers

It is shown that analogue-filter and analogue-detector circuits in data receivers can be replaced by simple digital networks designed from truth-table specifications. A method of compiling truth tables from given received-signal probabilities is presented. An example illustrates an application to the reception of binary raised cosine signals in the presence of Gaussian noise.

Matched Filters for Rectangular, Raised Cosine, and Half Sine Wave Signals

Practical constructions of matched filters for the typical waveshape of pulsed signals are shown. Each filter consists of a prefilter, delay line, and attenuator. The degraduation of output signal-to-noise ratio (SNR) due to loss factor in each prefilter is calculated.