An improved achievable rate region for causal cognitive radio

Authors:
Seyed Hossein Seyedmehdi;Jinhua Jiang;Yan Xin;Xiaodong Wang
Affiliations:
Dept. of ECE, University of Toronto, Toronto, ON, Canada;EE Dept., Stanford University, Stanford, CA;NEC Laboratories America Inc., Princeton, NJ;EE Dept., Columbia University, New York, NY
Venue:
ISIT'09 Proceedings of the 2009 IEEE international conference on Symposium on Information Theory - Volume 1
Year:
2009

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Abstract

This paper studies two-user causal cognitive radio channels, in which the secondary user has causal knowledge about the message being sent by the primary user. An inner bound on the capacity region of such channels is established by employing a coding strategy consisting of block Markov superposition and dirty paper encoding, and backward decoding. An illustrative example in the Gaussian case is provided.