TY - GEN
T1 - Weighted sum rate maximization for multi-user multi-relay MIMO systems with direct links
AU - Choi, Hyun Joo
AU - Lee, Kyoung Jae
AU - Song, Changick
AU - Kim, Heejin
AU - Lee, Inkyu
PY - 2013
Y1 - 2013
N2 - In this paper, we study a filter design which maximizes the weighted sum rate (WSR) in multi-user multi-relay systems equipped with multiple antennas at each node and account for the direct links between the base station and the mobile users. Since this problem is generally non-convex, it is quite complicated to analytically find a solution. Hence, we transform the WSR maximization problem to an equivalent weighted sum mean-squared-error (WSMSE) minimization problem which is more amenable. Then, we identify the filters at the base station and the relays for minimizing the WSMSE with a proper weight and propose an alternating computation algorithm which guarantees a local optimum solution. Through simulations, we confirm the effectiveness of our proposed scheme.
AB - In this paper, we study a filter design which maximizes the weighted sum rate (WSR) in multi-user multi-relay systems equipped with multiple antennas at each node and account for the direct links between the base station and the mobile users. Since this problem is generally non-convex, it is quite complicated to analytically find a solution. Hence, we transform the WSR maximization problem to an equivalent weighted sum mean-squared-error (WSMSE) minimization problem which is more amenable. Then, we identify the filters at the base station and the relays for minimizing the WSMSE with a proper weight and propose an alternating computation algorithm which guarantees a local optimum solution. Through simulations, we confirm the effectiveness of our proposed scheme.
UR - http://www.scopus.com/inward/record.url?scp=84893526397&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84893526397&partnerID=8YFLogxK
U2 - 10.1109/VTCSpring.2013.6692812
DO - 10.1109/VTCSpring.2013.6692812
M3 - Conference contribution
AN - SCOPUS:84893526397
SN - 9781467363372
T3 - IEEE Vehicular Technology Conference
BT - 2013 IEEE 77th Vehicular Technology Conference, VTC Spring 2013 - Proceedings
T2 - 2013 IEEE 77th Vehicular Technology Conference, VTC Spring 2013
Y2 - 2 June 2013 through 5 June 2013
ER -