TY - GEN

T1 - Generalized degrees of freedom of the symmetric K-user interference channel with feedback

AU - Mohajer, Soheil

AU - Tandon, Ravi

AU - Poor, H. Vincent

PY - 2012/10/22

Y1 - 2012/10/22

N2 - The symmetric K user interference channel with fully connected topology is considered, in which (a) each receiver suffers interference from all other K - 1 transmitters, and (b) each transmitter has causal and noiseless feedback from its respective receiver. The number of generalized degrees of freedom (GDoF) is characterized in terms of α, where the interference-to-noise ratio (INR) is given by INR = SNR α. It is shown that the number of per-user GDoF of this network is the same as that of the 2-user interference channel with feedback, except for α = 1, for which existence of feedback does not help in terms of GDoF. The coding scheme proposed for this network, termed cooperative interference alignment, is based on two key ingredients, namely, interference alignment and interference decoding.

AB - The symmetric K user interference channel with fully connected topology is considered, in which (a) each receiver suffers interference from all other K - 1 transmitters, and (b) each transmitter has causal and noiseless feedback from its respective receiver. The number of generalized degrees of freedom (GDoF) is characterized in terms of α, where the interference-to-noise ratio (INR) is given by INR = SNR α. It is shown that the number of per-user GDoF of this network is the same as that of the 2-user interference channel with feedback, except for α = 1, for which existence of feedback does not help in terms of GDoF. The coding scheme proposed for this network, termed cooperative interference alignment, is based on two key ingredients, namely, interference alignment and interference decoding.

UR - http://www.scopus.com/inward/record.url?scp=84867548997&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84867548997&partnerID=8YFLogxK

U2 - 10.1109/ISIT.2012.6284139

DO - 10.1109/ISIT.2012.6284139

M3 - Conference contribution

AN - SCOPUS:84867548997

SN - 9781467325790

T3 - IEEE International Symposium on Information Theory - Proceedings

SP - 3125

EP - 3129

BT - 2012 IEEE International Symposium on Information Theory Proceedings, ISIT 2012

T2 - 2012 IEEE International Symposium on Information Theory, ISIT 2012

Y2 - 1 July 2012 through 6 July 2012

ER -