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image/svg+xml Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao Closed Access logo, derived from PLoS Open Access logo. This version with transparent background. http://commons.wikimedia.org/wiki/File:Closed_Access_logo_transparent.svg Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao Research.fiarrow_drop_down
image/svg+xml Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao Closed Access logo, derived from PLoS Open Access logo. This version with transparent background. http://commons.wikimedia.org/wiki/File:Closed_Access_logo_transparent.svg Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao
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Article . 2020 . Peer-reviewed
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https://doi.org/10.1109/spawc....
Article . 2016 . Peer-reviewed
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Queue aware precoder design via OTA training

Authors: Ganesh Venkatraman; Antti Tölli; Markku J. Juntti; Le-Nam Tran;

Queue aware precoder design via OTA training

Abstract

We consider the problem of designing transmit and receive precoders to minimize the number of backlogged packets at the base stations (BSs) in a multiple-input multiple-output (MIMO)-orthogonal frequency division multiplexing (OFDM) scenario. Due to the nonconvex nature of the problem, we propose an iterative method for designing transmit precoders and receive beamformers. Since the overhead involved in exchanging channel state information (CSI) to a centralized controller is large, we propose a distributed precoder design using Karush-Kuhn-Tucker (KKT) expressions. In order to efficiently implement precoders and to reduce the signaling overhead, we use bi-directional training (BiT) design to feedback the involved variables in an analog format. By doing so, we penalize the achievable throughput by the number of resources consumed in the BiT procedure. A realistic dynamic traffic model is considered, where the transmission rates of all users depend on the current arrivals and the number of backlogged packets present in the respective BS. To improve the performance with limited BiT steps, we perform BS specific updates for the corresponding transmit and receive beamformers between each BiT exchange. Numerical simulations are provided to highlight the benefits of proposed schemes by considering multiple transmission slots under time-correlated fading model.

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selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
1
Average
Average
Average
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