TY - GEN
T1 - Before/after precoded massive MIMO in cloud radio access networks
AU - Park, Sangkyu
AU - Chae, Chan Byoung
AU - Bahk, Saewoong
PY - 2013
Y1 - 2013
N2 - In this paper, we investigate two types of IQ-data transfer methods for cloud MIMO network operation. They are termed 'after-precoding' and 'before-precoding.' We formulate a cloud massive MIMO operation problem that includes the best IQ-transfer method and beamforming strategy (beamforming technique, the number of concurrently receiving users, the number of used antennas for transmission) to maximize the ergodic sum-rates under the limited capacity of the digital unit (DU)-radio unit (RU) link. Based on our proposed solution, the optimal numbers of users and antennas are simultaneously chosen. Numerical results confirm the sum-rate gain is greater when adaptive 'after/before-precoding' method is available than when only 'after-precoding' IQ-data transfer is available.
AB - In this paper, we investigate two types of IQ-data transfer methods for cloud MIMO network operation. They are termed 'after-precoding' and 'before-precoding.' We formulate a cloud massive MIMO operation problem that includes the best IQ-transfer method and beamforming strategy (beamforming technique, the number of concurrently receiving users, the number of used antennas for transmission) to maximize the ergodic sum-rates under the limited capacity of the digital unit (DU)-radio unit (RU) link. Based on our proposed solution, the optimal numbers of users and antennas are simultaneously chosen. Numerical results confirm the sum-rate gain is greater when adaptive 'after/before-precoding' method is available than when only 'after-precoding' IQ-data transfer is available.
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U2 - 10.1109/ICCW.2013.6649222
DO - 10.1109/ICCW.2013.6649222
M3 - Conference contribution
AN - SCOPUS:84890876641
SN - 9781467357531
T3 - 2013 IEEE International Conference on Communications Workshops, ICC 2013
SP - 169
EP - 173
BT - 2013 IEEE International Conference on Communications Workshops, ICC 2013
T2 - 2013 IEEE International Conference on Communications Workshops, ICC 2013
Y2 - 9 June 2013 through 13 June 2013
ER -