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Journal Article
Simulation Models for Investigation of Multiuser Scheduling in MIMO Broadcast Channels
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- Authors
- Seung-Hwan Lee, John S. Thompson
- Issue Date
- 2008-12
- Citation
- ETRI Journal, v.30, no.6, pp.765-773
- ISSN
- 1225-6463
- Publisher
- 한국전자통신연구원 (ETRI)
- Language
- English
- Type
- Journal Article
- Project Code
- 07MM1300, Development of Adaptive Radio Access and Transmission Technologies for 4th Generation Mobile Communications, Kim Jinup
- Abstract
- 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.
- KSP Keywords
- 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