TY - GEN
T1 - Opportunistic downlink interference alignment
AU - Yang, Hyun Jong
AU - Shin, Won Yong
AU - Jung, Bang Chul
AU - Suh, Changho
AU - Paulraj, Arogyaswami
PY - 2014
Y1 - 2014
N2 - We introduce an opportunistic downlink interference alignment (ODIA) for interference-limited cellular downlink, which intelligently combines user scheduling and downlink IA techniques. The proposed ODIA not only efficiently reduces the effect of inter-cell interference from other-cell base stations (BSs) but also eliminates intra-cell interference among spatial streams in the same cell. We show that compared to the existing downlink IA schemes, the minimum number of users required to achieve a target degrees-of-freedom (DoF) can be fundamentally reduced, i.e., the fundamental user scaling law can be improved, by using the ODIA. In addition, we introduce a limited feedback strategy in our ODIA framework, and then analyze the minimum number of feedback bits required to obtain the same performance as that of the ODIA assuming perfect feedback.
AB - We introduce an opportunistic downlink interference alignment (ODIA) for interference-limited cellular downlink, which intelligently combines user scheduling and downlink IA techniques. The proposed ODIA not only efficiently reduces the effect of inter-cell interference from other-cell base stations (BSs) but also eliminates intra-cell interference among spatial streams in the same cell. We show that compared to the existing downlink IA schemes, the minimum number of users required to achieve a target degrees-of-freedom (DoF) can be fundamentally reduced, i.e., the fundamental user scaling law can be improved, by using the ODIA. In addition, we introduce a limited feedback strategy in our ODIA framework, and then analyze the minimum number of feedback bits required to obtain the same performance as that of the ODIA assuming perfect feedback.
UR - http://www.scopus.com/inward/record.url?scp=84906537486&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84906537486&partnerID=8YFLogxK
U2 - 10.1109/ISIT.2014.6875101
DO - 10.1109/ISIT.2014.6875101
M3 - Conference contribution
AN - SCOPUS:84906537486
SN - 9781479951864
T3 - IEEE International Symposium on Information Theory - Proceedings
SP - 1588
EP - 1592
BT - 2014 IEEE International Symposium on Information Theory, ISIT 2014
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 2014 IEEE International Symposium on Information Theory, ISIT 2014
Y2 - 29 June 2014 through 4 July 2014
ER -