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|Title:||Degrees of freedom region in multi-cell random beamforming|
|Keywords:||degrees of freedom (DoF)|
Random beamforming (RBF)
|Citation:||Nguyen, H.D.,Zhang, R.,Hui, H.T. (2012). Degrees of freedom region in multi-cell random beamforming. ICASSP, IEEE International Conference on Acoustics, Speech and Signal Processing - Proceedings : 2837-2840. ScholarBank@NUS Repository. https://doi.org/10.1109/ICASSP.2012.6288508|
|Abstract:||Random beamforming (RBF) is a practically favorable transmission scheme for multiuser multi-antenna downlink systems. This paper studies the asymptotic rates achievable with RBF in a multi-cell system subject to the inter-cell interference, by assuming that the number of users in each cell scales in a given order with the signal-to-noise ratio (SNR). In particular, we investigate the achievable degrees of freedom (DoF) for the sum-rate in each cell when the SNR goes to infinity, and characterize the achievable DoF region for all the cells. Our results show that to achieve the DoF-optimal transmission in a multi-cell system with RBF, the numbers of transmit beams in all the cells need to be assigned in a collaborative manner based on the user densities. © 2012 IEEE.|
|Source Title:||ICASSP, IEEE International Conference on Acoustics, Speech and Signal Processing - Proceedings|
|Appears in Collections:||Staff Publications|
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