Chapter 24: Interactive Communication and Feedback

Learning Objectives

• Prove that feedback does not increase the capacity of a point-to-point DMC
• Show that feedback can enlarge the capacity region of the multiple-access channel
• State and understand the Cover-Leung inner bound for the MAC with feedback
• Describe the Ozarow-Leung scheme for the Gaussian MAC with feedback and the Schalkwijk-Kailath scheme
• Explain how feedback improves broadcast channel capacity via retransmission strategies
• Formulate Shannon's two-way channel and understand the role of interaction