A Partial Response Binary Communication System with Erasure

Formulas for probability of error (P
e
) and probability of erasure (P
o
) for a binary communication system with partial response signals (duobinary, dicode, modified duobinary) and either decision feedback or precoding are presented.The input data are binary,but the output data are ternary where the third symbol represents erasure.The system with decision feedback is not improved(p
e
notreduced) by the introduction of erasure,while a significant improvement occurs in the system with precoding.