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Proceedings ArticleDOI

Dynamic Channel State Information based Relay Selection in Device-to-Device Communication

TLDR
A dynamic channel state interval (CSI) based feedback design for improving the features of relay selection to improve the performance of the D2D communication networks.
Abstract
Relay selection in Device-to-Device (D2D) communication network is a prominent task due to the imperfect channel conditions and sensing intervals. This paper presents a dynamic channel state interval (CSI) based feedback design for improving the features of relay selection to improve the performance of the D2D communication networks. Based on the dynamic detection of imperfect channel conditions and sensing intervals, the precoding process is employed for the signal derivative in the relay selection process. The relay with a high order of signal output determines its selection. The performance of the proposed method is verified for the sum rate metric for the varying CSI bits, transmit power and inter-user distance.

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Journal ArticleDOI

IoT-Enabled Solid Waste Management in Smart Cities

TL;DR: This work proposes an IoT-enabled solid waste management system for smart cities to overcome the limitations of the traditional waste management systems and measures the sleep current and active current contributions of a PBLMU to estimate its average current consumption.
References
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Spatially Common Sparsity Based Adaptive Channel Estimation and Feedback for FDD Massive MIMO

TL;DR: A spatially common sparsity based adaptive channel estimation and feedback scheme for frequency division duplex based massive multi-input multi-output (MIMO) systems, which adapts training overhead and pilot design to reliably estimate and feed back the downlink channel state information (CSI) with significantly reduced overhead.
Journal ArticleDOI

Multi-Hop Relay-Aided Underlay D2D Communications for Improving Cellular Coverage Quality

TL;DR: The theoretical analysis proves the existence of Nash equilibrium, and the simulation results show that the proposed game decision algorithm accelerates convergence and the proposed whole scheme improves cellular coverage quality.
Journal ArticleDOI

Opportunistic Two-Way Full-Duplex Relay Selection in Underlay Cognitive Networks

TL;DR: The performance of secondary user in underlay cognitive networks is analyzed by considering opportunistic selection of two-way full-duplex (FD)-based amplify-and-forward (AF) relays, and results show that the performance of the secondary users can be substantially influenced by parameters such as the number of relays, the average SNR, the primary user’s tolerable interference threshold.
Journal ArticleDOI

Training Sequence Design for Feedback Assisted Hybrid Beamforming in Massive MIMO Systems

TL;DR: This paper considers the problem of training sequence design and the mapping of training signals to training periods, and focuses on reduced-dimension training sequence designs, along with transmit precoder designs, aimed at reducing both hardware complexity and power consumption.
Posted Content

Training Sequence Design for Feedback Assisted Hybrid Beamforming in Massive MIMO Systems

TL;DR: In this paper, the authors considered the problem of training sequence design that employs a set of training signals and its mapping to the training periods, and extended the resulting designs to hybrid analog-digital beamforming systems, which employ a limited number of active RF chains for transmit precoding.
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