Optimal Time-Division of Two-Phase Decode-and-Forward Bidirectional Relaying
2008 (English)In: 2008 INTERNATIONAL SYMPOSIUM ON INFORMATION THEORY AND ITS APPLICATIONS, VOLS 1-3, 2008, 829-834 p.Conference paper (Refereed)
A relay node establishes bidirectional communication between two nodes using a two-phase decode-and-forward protocol. In the first phase nodes 1 and 2 transmit their messages to the relay node, which decodes the messages. In the succeeding phase the relay broadcasts a re-encoded message using the network coding idea so that each node can decode the other's message using its own message as side information. In this work we optimize the time-division between the two phases assuming memoryless Gaussian channels with multiple antennas at the relay node and single antennas at nodes 1 and 2. It shows that the achievable rate region is convex without additional time-sharing between two operating points. The presented equivalent characterization of the achievable rate region simplifies the optimization problem. of resource allocation policies.
Place, publisher, year, edition, pages
2008. 829-834 p.
IdentifiersURN: urn:nbn:se:kth:diva-52404DOI: 10.1109/ISITA.2008.4895522ISI: 000273504800150OAI: oai:DiVA.org:kth-52404DiVA: diva2:466421
International Symposium on Information Theory and Its Applications. Auckland, NEW ZEALAND. DEC 07-10, 2008
QC 201112162011-12-152011-12-152011-12-16Bibliographically approved