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ICC
2009
IEEE

On the Capacity of Bidirectional Broadcast Channels under Channel Uncertainty

9 years 7 months ago
On the Capacity of Bidirectional Broadcast Channels under Channel Uncertainty
We consider the broadcast phase of a spectrally efficient two-phase decode-and-forward protocol which is used by a relay node to establish a bidirectional communication between two nodes. In the first phase the two nodes transmit their message to the relay node which decodes the messages. In the succeeding phase the relay node broadcasts a re-encoded composition of them. We consider imperfect channel knowledge and assume that all nodes merely know that the channel used for the transmission belongs to a set of channels. This is called compound bidirectional broadcast channel. We derive a universal strategy which achieves capacity and show that perfect channel state information (CSI) at the receivers does not lead to an increased capacity region. Otherwise, perfect CSI at the transmitter can advantageously be used to enlarge the capacity region. Finally, we give a gametheoretic interpretation as a game against nature.
Rafael F. Wyrembelski, Igor Bjelakovic, Tobias J.
Added 18 Feb 2011
Updated 18 Feb 2011
Type Journal
Year 2009
Where ICC
Authors Rafael F. Wyrembelski, Igor Bjelakovic, Tobias J. Oechtering, Holger Boche
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