Feedback for Error Control and Two-Way Communication

This paper surveys some recent advances in coding, feedback, and two-way communications. It considers the usefulness of feedback relative to coding, the kind of feedback system to use, the advantages of combining feedback with coding and the characteristics of a system that results therefrom. It then takes up the question of how feedback for error-control purposes can be incorporated into a two-way communication system and the effectiveness of block codes plus feedback in combatting burst-type noise. Finally, the paper presents a brief discussion of existing feedback systems using some of these principles.