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

Amirashkan Farsaei (Corresponding author), Alex Alvarado, Frans Willems, Ulf Gustavsson

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Uittreksel

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 letter, 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.

Originele taal-2Engels
Artikelnummer8695106
Pagina's (van-tot)1109-1112
Aantal pagina's4
TijdschriftIEEE Communications Letters
Volume23
Nummer van het tijdschrift6
DOI's
StatusGepubliceerd - jun 2019

Vingerafdruk

Power Control
Beamforming
Min-max
MIMO systems
Multiple-input multiple-output (MIMO)
Power control
Zero-forcing
Line
Threshold Value
Base stations
Signal to noise ratio
Antennas
Antenna
Simulation
Scenarios

Citeer dit

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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.

In: IEEE Communications Letters, Vol. 23, Nr. 6, 8695106, 06.2019, blz. 1109-1112.

Onderzoeksoutput: Bijdrage aan tijdschriftTijdschriftartikelAcademicpeer review

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