TY - GEN
T1 - On the capacity of bidirectional relaying with unknown varying channels
AU - Wyrembelski, Rafael F.
AU - Bjelaković, Igor
AU - Boche, Holger
PY - 2009
Y1 - 2009
N2 - One key feature to improve the performance of future wireless communication systems will be the use of relays. In this work, we consider the bidirectional relay channel, where a relay node establishes a bidirectional communication between two nodes, and study coding strategies for the case of unknown varying channels. In the first phase of a decode-and-forward protocol the two nodes transmit their messages to the relay node, which decodes them. In the succeeding bidirectional broadcast phase the relay broadcasts a re-encoded composition of them so that both nodes can decode the intended message using their own message from the previous phase as side information. We assume that the whole communication is affected by unknown varying channels. For both phases we present the capacity regions and characterize the impact of channel uncertainty on the achievable rates. Thereby, it shows that the unknown variation can lead to channels which completely prohibit a reliable communication.
AB - One key feature to improve the performance of future wireless communication systems will be the use of relays. In this work, we consider the bidirectional relay channel, where a relay node establishes a bidirectional communication between two nodes, and study coding strategies for the case of unknown varying channels. In the first phase of a decode-and-forward protocol the two nodes transmit their messages to the relay node, which decodes them. In the succeeding bidirectional broadcast phase the relay broadcasts a re-encoded composition of them so that both nodes can decode the intended message using their own message from the previous phase as side information. We assume that the whole communication is affected by unknown varying channels. For both phases we present the capacity regions and characterize the impact of channel uncertainty on the achievable rates. Thereby, it shows that the unknown variation can lead to channels which completely prohibit a reliable communication.
UR - http://www.scopus.com/inward/record.url?scp=77951138139&partnerID=8YFLogxK
U2 - 10.1109/CAMSAP.2009.5413283
DO - 10.1109/CAMSAP.2009.5413283
M3 - Conference contribution
AN - SCOPUS:77951138139
SN - 9781424451807
T3 - CAMSAP 2009 - 2009 3rd IEEE International Workshop on Computational Advances in Multi-Sensor Adaptive Processing
SP - 269
EP - 272
BT - CAMSAP 2009 - 2009 3rd IEEE International Workshop on Computational Advances in Multi-Sensor Adaptive Processing
T2 - 2009 3rd IEEE International Workshop on Computational Advances in Multi-Sensor Adaptive Processing, CAMSAP 2009
Y2 - 13 December 2009 through 16 December 2009
ER -