TY - GEN
T1 - Achieve the degrees of freedom of K-user MIMO interference channel with a MIMO relay
AU - Chen, Sujie
AU - Cheng, Roger S.
PY - 2010
Y1 - 2010
N2 - This paper investigates the problem of achieving the degrees of freedom (DoF) of a K-user multiple-input-multiple-output (MIMO) interference channel with a MIMO relay, where each transmitter and receiver is equipped with M antennas. We propose a two-hop relay aided transmission scheme based on the idea of interference alignment to achieve the full DoF KM/2. The scheme requires global channel state information (CSI) at the MIMO relay only while other nodes only need to have their local CSI. We also study the number of antennas needed at the MIMO relay to achieve interference alignment. In particular, we find that using just linear processing at the relay, the minimum number of antennas needed at the relay for each transmitter-receiver pair to achieve the maximum M/2 DoF per channel use is (K - 1)M, less than what is needed for decode-and-forward approach and all other reported approaches in existing literatures.
AB - This paper investigates the problem of achieving the degrees of freedom (DoF) of a K-user multiple-input-multiple-output (MIMO) interference channel with a MIMO relay, where each transmitter and receiver is equipped with M antennas. We propose a two-hop relay aided transmission scheme based on the idea of interference alignment to achieve the full DoF KM/2. The scheme requires global channel state information (CSI) at the MIMO relay only while other nodes only need to have their local CSI. We also study the number of antennas needed at the MIMO relay to achieve interference alignment. In particular, we find that using just linear processing at the relay, the minimum number of antennas needed at the relay for each transmitter-receiver pair to achieve the maximum M/2 DoF per channel use is (K - 1)M, less than what is needed for decode-and-forward approach and all other reported approaches in existing literatures.
UR - https://www.scopus.com/pages/publications/79551639320
U2 - 10.1109/GLOCOM.2010.5683250
DO - 10.1109/GLOCOM.2010.5683250
M3 - Conference Paper published in a book
AN - SCOPUS:79551639320
SN - 9781424456383
T3 - GLOBECOM - IEEE Global Telecommunications Conference
BT - 2010 IEEE Global Telecommunications Conference, GLOBECOM 2010
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 53rd IEEE Global Communications Conference, GLOBECOM 2010
Y2 - 6 December 2010 through 10 December 2010
ER -