TY - GEN
T1 - Optimal joint base station assignment and downlink beamforming for heterogeneous networks
AU - Sanjabi, Maziar
AU - Razaviyayn, Meisam
AU - Luo, Zhi-Quan
PY - 2012
Y1 - 2012
N2 - Consider a MIMO heterogeneous network with multiple transmitters (including macro, pico and femto base stations) and many receivers (mobile users). The users are to be assigned to the base stations which then optimize their linear transmit beamformers accordingly. In this work, we consider the problem of joint base station assignment and linear beamformer design to maximize a system wide utility. We first establish the NP-hardness of the resulting optimization problem for a large family of a-fairness utility functions. Then, we propose an efficient algorithm to approximately solve this problem for the special case of sum rate maximization. The simulation results show that the algorithm improves the sum rate.
AB - Consider a MIMO heterogeneous network with multiple transmitters (including macro, pico and femto base stations) and many receivers (mobile users). The users are to be assigned to the base stations which then optimize their linear transmit beamformers accordingly. In this work, we consider the problem of joint base station assignment and linear beamformer design to maximize a system wide utility. We first establish the NP-hardness of the resulting optimization problem for a large family of a-fairness utility functions. Then, we propose an efficient algorithm to approximately solve this problem for the special case of sum rate maximization. The simulation results show that the algorithm improves the sum rate.
KW - Base Station Assignment
KW - Complexity Analysis
KW - Heterogeneous Network
KW - MIMO Beamforming
UR - http://www.scopus.com/inward/record.url?scp=84867585929&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84867585929&partnerID=8YFLogxK
U2 - 10.1109/ICASSP.2012.6288504
DO - 10.1109/ICASSP.2012.6288504
M3 - Conference contribution
AN - SCOPUS:84867585929
SN - 9781467300469
T3 - ICASSP, IEEE International Conference on Acoustics, Speech and Signal Processing - Proceedings
SP - 2821
EP - 2824
BT - 2012 IEEE International Conference on Acoustics, Speech, and Signal Processing, ICASSP 2012 - Proceedings
T2 - 2012 IEEE International Conference on Acoustics, Speech, and Signal Processing, ICASSP 2012
Y2 - 25 March 2012 through 30 March 2012
ER -
