TY - GEN
T1 - Degrees-of-freedom of the K-user MISO interference channel with delayed local CSIT
AU - Hao, Chenxi
AU - Clerckx, Bruno
N1 - Publisher Copyright:
© 2015 IEEE.
PY - 2015/9/9
Y1 - 2015/9/9
N2 - This paper considers a K-user Multiple-Input-Single-Output (MISO) Interference Channel (IC), where the channel state information obtained by the transmitters (CSIT) is perfect, but completely outdated. A Retrospective Interference Alignment (RIA) using such delayed CSIT was proposed by Maddah-Ali et. al for the MISO Broadcast Channel (BC), but the extension to the MISO IC is a non-trivial step as each transmitter only has the message intended for the corresponding user. Recently, Abdoli et.al focused on a Single-Input-Single-Output (SISO) IC and solved such bottleneck by inventing a distributed higher order symbol generation. Our main work is to extend Abdoli's work to the MISO case by integrating some features of Maddah-Ali's scheme. The achieved sum Degrees-of-Freedom (DoF) performance is asymptotically given by 64/15 when K→∞, outperforming all the previously known results.
AB - This paper considers a K-user Multiple-Input-Single-Output (MISO) Interference Channel (IC), where the channel state information obtained by the transmitters (CSIT) is perfect, but completely outdated. A Retrospective Interference Alignment (RIA) using such delayed CSIT was proposed by Maddah-Ali et. al for the MISO Broadcast Channel (BC), but the extension to the MISO IC is a non-trivial step as each transmitter only has the message intended for the corresponding user. Recently, Abdoli et.al focused on a Single-Input-Single-Output (SISO) IC and solved such bottleneck by inventing a distributed higher order symbol generation. Our main work is to extend Abdoli's work to the MISO case by integrating some features of Maddah-Ali's scheme. The achieved sum Degrees-of-Freedom (DoF) performance is asymptotically given by 64/15 when K→∞, outperforming all the previously known results.
UR - http://www.scopus.com/inward/record.url?scp=84953736886&partnerID=8YFLogxK
U2 - 10.1109/ICC.2015.7248985
DO - 10.1109/ICC.2015.7248985
M3 - Conference contribution
AN - SCOPUS:84953736886
T3 - IEEE International Conference on Communications
SP - 4217
EP - 4222
BT - 2015 IEEE International Conference on Communications, ICC 2015
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - IEEE International Conference on Communications, ICC 2015
Y2 - 8 June 2015 through 12 June 2015
ER -