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학술지 Simulation Models for Investigation of Multiuser Scheduling in MIMO Broadcast Channels
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저자
이승환, John Thompson
발행일
200812
출처
ETRI Journal, v.30 no.6, pp.765-773
ISSN
1225-6463
출판사
한국전자통신연구원 (ETRI)
DOI
https://dx.doi.org/10.4218/etrij.08.0107.0290
협약과제
07MM1300, 4세대 이동통신용 적응 무선접속 및 전송 기술개발, 김진업
초록
Spatial correlation is a result of insufficient antenna spacing among multiple antenna elements, while temporal correlation is caused by Doppler spread. This paper compares the effect of spatial and temporal correlation in order to investigate the performance of multiuser scheduling algorithms in multiple-input multiple-output (MIMO) broadcast channels. This comparison includes the effect on the ergodic capacity, on fairness among users, and on the sum-rate capacity of a multiuser scheduling algorithm utilizing statistical channel state information in spatio-temporally correlated MIMO broadcast channels. Numerical results demonstrate that temporal correlation is more meaningful than spatial correlation in view of the multiuser scheduling algorithm in MIMO broadcast channels. Indeed, the multiuser scheduling algorithm can reduce the effect of the Doppler spread if it exploits the information of temporal correlation appropriately. However, the effect of spatial correlation can be minimized if the antenna spacing is sufficient in rich scattering MEVIO channels regardless of the multiuser scheduling algorithm used.
키워드
Broadcast channel (BC), Channel model, Multiple-input multiple-output (MIMO), Multiuser scheduling, Spatial correlation, Temporal correlation
KSP 제안 키워드
Antenna Spacing, Channel State Information(CSI), Doppler spread, Ergodic capacity, MIMO broadcast channel, Multiple input multiple output(MIMO), Numerical results, Scheduling algorithm, Simulation Model, Spatial and temporal correlation, antenna elements