2014/02/04 by Rui Wu, Vinod M. Prabhakaran, Wu, Rui +5
Computer Science · Engineering · #Cooperative Communication and Network Coding #Energy Harvesting in Wireless Networks #FOS: Computer and information sciences #Information Theory (cs.IT) #Wireless Communication Security Techniques
paper · pdf · doi:10.48550/arxiv.1402.0898
openalex publication_date 2014/02/04 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
The performance gain by allowing half-duplex source cooperation is studied for Gaussian interference channels. The source cooperation is \em in-band, meaning that each source can listen to the other source's transmission, but there is no independent (or orthogonal) channel between the sources. The half-duplex constraint supposes that at each time instant the sources can either transmit or listen, but not do both. Our main result is a characterization of the sum capacity when the cooperation is bidirectional and the channel gains are symmetric. With unidirectional cooperation, we essentially have a cognitive radio channel. By requiring the primary to achieve a rate close to its link capacity, the best possible rate for the secondary is characterized within a constant. Novel inner and outer bounds are derived as part of these characterizations.