THE EFFECT OF PREMODULATION FILTERS ON BIT ERROR RATE PERFORMANCE

Abstract

This paper examines the effect of different types of premodulation filters on the time waveshapes of PCM signals. Using a simplified model of this effect, an expression for the Probability of Error in the presence of Gausian Noise is derived and compared for systems with and without premodulation filtering. A simple single bit decision feedback detector is designed and an evaluation made of its usefulness in improving bit error rate performance using different filters in the presence of different amounts of noise.