A New Capacity Result for the Z-Gaussian Cognitive Interference Channel

Abstract

This work proposes a novel outer bound for the Gaussian cognitive interference channel in strong interference at the primary receiver based on the capacity of a multi-antenna broadcast channel with degraded message set. It then shows that for the Z-channel, i.e., when the secondary receiver experiences no interference and the primary receiver experiences strong interference, the proposed outer bound not only is the tightest among known bounds but is actually achievable for sufficiently strong interference. The latter is a novel capacity result that from numerical evaluations appears to be generalizable to a larger (i.e., non-Z) class of Gaussian channels.

References in corpus (4)

• New inner and outer bounds for the discrete memoryless cognitive interference channel and some capacity results
• The Capacity of the Semi-Deterministic Cognitive Interference Channel and its Application to Constant Gap Results for the Gaussian Channel
• The Capacity Region of the Cognitive Z-interference Channel with One Noiseless Component
• New Results on the Capacity of the Gaussian Cognitive Interference Channel