An improved Manchester code receiver

Abstract

It is shown that a simple modification to a basic Manchester code receiver can significantly improve its performance, both in terms of noise tolerance and intersymbol interference. The modification consists of subtracting a delayed sample of the received signal from the current sample. This improved receiver has potential application in extending reliable operation of wire-pair transmission to 10 Mb/s over a distance of 600 ft, as indicated by an improvement of approximately 5.4 dB over present receivers in tolerance to white noise.<>