TY - GEN
T1 - Signal space alignment and degrees of freedom for the two-cluster multi-way relay channel
AU - Tian, Ye
AU - Yener, Aylin
PY - 2012
Y1 - 2012
N2 - This paper investigates the degrees of freedom (DoF) of the multi-way relay channel. Specifically, the focus is on the case when there are two clusters and each cluster has two users that wish to exchange messages within the cluster with the help of the relay. It is assumed that the relay has N antennas and each of the users has M antennas. A DoF outerbound is derived and it is shown that for several scenarios of interests the DoF outerbound can be achieved. Specifically, when N ≤ M, a network coding based two-way relaying approach with time division multiplex access (TDMA) is sufficient to achieve the DoF outerbound. When M < N ≤ 4/3M, the signal space alignment with multiple access and broadcast transmission between the clusters can achieve the DoF outerbound. It is also show that when N ≥ 4M, the DoF outerbound can be achieved by just using multiple access and broadcast transmission between the users.
AB - This paper investigates the degrees of freedom (DoF) of the multi-way relay channel. Specifically, the focus is on the case when there are two clusters and each cluster has two users that wish to exchange messages within the cluster with the help of the relay. It is assumed that the relay has N antennas and each of the users has M antennas. A DoF outerbound is derived and it is shown that for several scenarios of interests the DoF outerbound can be achieved. Specifically, when N ≤ M, a network coding based two-way relaying approach with time division multiplex access (TDMA) is sufficient to achieve the DoF outerbound. When M < N ≤ 4/3M, the signal space alignment with multiple access and broadcast transmission between the clusters can achieve the DoF outerbound. It is also show that when N ≥ 4M, the DoF outerbound can be achieved by just using multiple access and broadcast transmission between the users.
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U2 - 10.1109/ICCChina.2012.6356855
DO - 10.1109/ICCChina.2012.6356855
M3 - Conference contribution
AN - SCOPUS:84871505441
SN - 9781467328159
T3 - 2012 1st IEEE International Conference on Communications in China, ICCC 2012
SP - 12
EP - 17
BT - 2012 1st IEEE International Conference on Communications in China, ICCC 2012
T2 - 2012 1st IEEE International Conference on Communications in China, ICCC 2012
Y2 - 15 August 2012 through 17 August 2012
ER -