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Achievable sum-rate of multiuser massive MIMO downlink in ricean fading channels

W. Tan ; S. Jin ; J. Wang ; Michail Matthaiou (Institutionen för signaler och system, Signalbehandling)
IEEE International Conference on Communications, ICC 2015, London, United Kingdom, 8-12 June 2015 (1550-3607). p. 1453-1458. (2015)
[Konferensbidrag, refereegranskat]

We investigate the achievable ergodic sum-rate of multi-user multiple-input multiple-output systems in Ricean fading channels. We first derive a lower bound on the average signal-to-leakage-and-noise ratio by utilizing the Mullen's inequality, which is then used to analyze the effect of channel mean information on the achievable sum-rate. With these results, a novel statistical-eigenmode space-division multipleaccess downlink transmission scheme is proposed. For this scheme, we derive an exact closed-form expression for the achievable ergodic sum-rate. Our results show that the achievable ergodic sum-rate converges to a saturation value in the high signal-to-noise ratio (SNR) region and reaches to a lower limit value in the lower Ricean K-factor range. In addition, we present tractable upper and lower bounds, which are shown to be tight for any SNR and Ricean K-factor value. Finally, the theoretical analysis is validated via numerical simulations.

Denna post skapades 2016-01-21. Senast ändrad 2016-08-22.
CPL Pubid: 231069


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Institutionen för signaler och system, Signalbehandling (1900-2017)



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