Coded Binary Decision-Feedback Communication Systems

The problem of nonconservation of message length in a decision-feedback system arises as a result of noise in the feedback channel. A system is considered which avoids this by requiring all corrections to be transmitted during specified intervals. The decision mechanism of the receiver is based on the structure of a modified Slepian code, and several final decision schemes are analyzed and compared. Comparisons are also made with unidirectional systems and ideal decision-feedback systems, and it is found that much of the theoretical advantage of a decision-feedback system over a unidirectional system is retained.