TY - GEN
T1 - The symmetric sum-capacity of the Gaussian half-duplex causal cognitive interference channel to within a constant gap
AU - Cardone, Martina
AU - Tuninetti, Daniela
AU - Knopp, Raymond
AU - Salim, Umer
PY - 2013
Y1 - 2013
N2 - This paper studies the sum-capacity of the Gaussian half-duplex causal cognitive interference channel, a channel model with two transmitter-receiver pairs where a (cognitive) source cooperates with the other (primary) source in sending data through a shared channel. In contrast to the classical cognitive radio model, here the cognitive source can not transmit and receive at the same time and must causally learn the primary message through a noisy channel. Achievable strategies are developed and shown to match known upper bounds on the symmetric sum-capacity of this channel to within a constant gap for all values of channel parameters. In the process, the generalized degrees of freedom of the channel is characterized.
AB - This paper studies the sum-capacity of the Gaussian half-duplex causal cognitive interference channel, a channel model with two transmitter-receiver pairs where a (cognitive) source cooperates with the other (primary) source in sending data through a shared channel. In contrast to the classical cognitive radio model, here the cognitive source can not transmit and receive at the same time and must causally learn the primary message through a noisy channel. Achievable strategies are developed and shown to match known upper bounds on the symmetric sum-capacity of this channel to within a constant gap for all values of channel parameters. In the process, the generalized degrees of freedom of the channel is characterized.
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U2 - 10.1109/ISIT.2013.6620327
DO - 10.1109/ISIT.2013.6620327
M3 - Conference contribution
AN - SCOPUS:84890351426
SN - 9781479904464
T3 - IEEE International Symposium on Information Theory - Proceedings
SP - 754
EP - 758
BT - 2013 IEEE International Symposium on Information Theory, ISIT 2013
T2 - 2013 IEEE International Symposium on Information Theory, ISIT 2013
Y2 - 7 July 2013 through 12 July 2013
ER -