### Abstract

Language | English |
---|---|

Pages | 1109-1112 |

Number of pages | 4 |

Journal | IEEE Communications Letters |

Volume | 23 |

Issue number | 6 |

DOIs | |

State | Published - 2019 |

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### Cite this

*IEEE Communications Letters*,

*23*(6), 1109-1112. DOI: 10.1109/LCOMM.2019.2912601

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*IEEE Communications Letters*, vol. 23, no. 6, pp. 1109-1112. DOI: 10.1109/LCOMM.2019.2912601

**An improved dropping algorithm for line-of-sight massive MIMO with max-min power control.** / Farsaei, Amirashkan (Corresponding author); Alvarado, Alex ; Willems, Frans; Gustavsson, Ulf.

Research output: Contribution to journal › Article › Academic › peer-review

TY - JOUR

T1 - An improved dropping algorithm for line-of-sight massive MIMO with max-min power control

AU - Farsaei,Amirashkan

AU - Alvarado,Alex

AU - Willems,Frans

AU - Gustavsson,Ulf

PY - 2019

Y1 - 2019

N2 - In line-of-sight massive MIMO, there is a nonnegligible probability that two users become highly correlated, which leads to a reduction in the achievable sum-rates of linear precoders. In this paper, threshold values of a previously proposed dropping algorithm are found analytically to avoid repeating a large number of simulations to find the optimal threshold. These thresholds allow us to improve conjugate beamforming (CB) and zero-forcing (ZF) sum-rates with max-min power control. By using the proposed threshold values, the CB and ZF sum-rates are maximized, when there are only two correlated users. In addition, by using the derived thresholds, a modified dropping algorithm is proposed for channels with any number of correlated users. The results of the simulation scenarios show that at signal to noise ratio of 20 dB and 120 antennas at the base station, the modified algorithm improves the average CB and ZF sum-rates up to 36% and 5%, respectively.

AB - In line-of-sight massive MIMO, there is a nonnegligible probability that two users become highly correlated, which leads to a reduction in the achievable sum-rates of linear precoders. In this paper, threshold values of a previously proposed dropping algorithm are found analytically to avoid repeating a large number of simulations to find the optimal threshold. These thresholds allow us to improve conjugate beamforming (CB) and zero-forcing (ZF) sum-rates with max-min power control. By using the proposed threshold values, the CB and ZF sum-rates are maximized, when there are only two correlated users. In addition, by using the derived thresholds, a modified dropping algorithm is proposed for channels with any number of correlated users. The results of the simulation scenarios show that at signal to noise ratio of 20 dB and 120 antennas at the base station, the modified algorithm improves the average CB and ZF sum-rates up to 36% and 5%, respectively.

U2 - 10.1109/LCOMM.2019.2912601

DO - 10.1109/LCOMM.2019.2912601

M3 - Article

VL - 23

SP - 1109

EP - 1112

JO - IEEE Communications Letters

T2 - IEEE Communications Letters

JF - IEEE Communications Letters

SN - 1089-7798

IS - 6

ER -