### Skapa referens, olika format (klipp och klistra)

**Harvard**

Kong, C., Zhong, C., Matthaiou, M. och Zhang, Z. (2015) *Performance of downlink massive MIMO in ricean fading channels with ZF precoder*.

** BibTeX **

@conference{

Kong2015,

author={Kong, C. and Zhong, C. and Matthaiou, Michail and Zhang, Z.},

title={Performance of downlink massive MIMO in ricean fading channels with ZF precoder},

booktitle={IEEE International Conference on Communications, ICC 2015, London, United Kingdom, 8-12 June 2015},

isbn={978-1-4673-6432-4},

pages={1776-1782},

abstract={We investigate the achievable sum rate and energy efficiency of zero-forcing precoded downlink massive multipleinput multiple-output systems in Ricean fading channels. A simple and accurate approximation of the average sum rate is presented, which is valid for a system with arbitrary rank channel means. Based on this expression, the optimal power allocation strategy maximizing the average sum rate is derived. Moreover, considering a general power consumption model, the energy efficiency of the system with rank-1 channel means is characterized. Specifically, the impact of key system parameters, such as the number of users N, the number of BS antennas M, Ricean factor K and the signal-to-noise ratio (SNR) ρ are studied, and closed-form expressions for the optimal ρ and M maximizing the energy efficiency are derived. Our findings show that the optimal power allocation scheme follows the water filling principle, and it can substantially enhance the average sum rate in the presence of strong line-of-sight effect in the low SNR regime. In addition, we demonstrate that the Ricean factor K has significant impact on the optimal values of M, N and ρ.},

year={2015},

}

** RefWorks **

RT Conference Proceedings

SR Electronic

ID 231067

A1 Kong, C.

A1 Zhong, C.

A1 Matthaiou, Michail

A1 Zhang, Z.

T1 Performance of downlink massive MIMO in ricean fading channels with ZF precoder

YR 2015

T2 IEEE International Conference on Communications, ICC 2015, London, United Kingdom, 8-12 June 2015

SN 978-1-4673-6432-4

SP 1776

OP 1782

AB We investigate the achievable sum rate and energy efficiency of zero-forcing precoded downlink massive multipleinput multiple-output systems in Ricean fading channels. A simple and accurate approximation of the average sum rate is presented, which is valid for a system with arbitrary rank channel means. Based on this expression, the optimal power allocation strategy maximizing the average sum rate is derived. Moreover, considering a general power consumption model, the energy efficiency of the system with rank-1 channel means is characterized. Specifically, the impact of key system parameters, such as the number of users N, the number of BS antennas M, Ricean factor K and the signal-to-noise ratio (SNR) ρ are studied, and closed-form expressions for the optimal ρ and M maximizing the energy efficiency are derived. Our findings show that the optimal power allocation scheme follows the water filling principle, and it can substantially enhance the average sum rate in the presence of strong line-of-sight effect in the low SNR regime. In addition, we demonstrate that the Ricean factor K has significant impact on the optimal values of M, N and ρ.

LA eng

DO 10.1109/ICC.2015.7248582

LK http://dx.doi.org/10.1109/ICC.2015.7248582

OL 30