QMIC Research: Recent submissions
Now showing items 181-200 of 219
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Enhanced service delivery for cognitive systems within multiple antenna scenarios
( IEEE Computer Society , 2013 , Conference)Multiple Input Multiple Output (MIMO) is a well established technology that when jointly considered with Cognitive Radio (CR) it will create interactions that need to be optimized. The capability to provide service to more ... -
Grassmannian beamforming for Coordinated Multipoint transmission in multicell systems
( IEEE Computer Society , 2013 , Conference)Wireless communications suffer from the problem of interference, where undesired signals reach the destination and cause its performance to degrade. Several mechanisms have been proposed over the last years to mitigate the ... -
Energy efficient techniques for 802.11n multiuser MAC WLANs
( Institute of Electrical and Electronics Engineers Inc. , 2013 , Conference)In this paper we evaluate the energy efficiency of MIMO technologies introduced in the emerging IEEE 802.11n standard for infrastructure based WLANs. The main focus is on exploiting multiuser capabilities of MIMO technologies, ... -
Opportunistic bi-directional scheduling under quality of experience demands
( Association for Computing Machinery , 2013 , Conference)Quality of Experience (QoE) is a very important metric in wireless communication systems, where customers request strict QoE demands that translate into restrictions on both Uplink (UL) and Downlink (DL) connections. The ... -
Green handover with a hybrid satisfaction mechanism
( IEEE Computer Society , 2013 , Conference)Green communications have emerged as one of the most important trends in wireless communications because of its several advantages of interference reduction, battery life increase and electrical bill cut. Its application ... -
A novel energy saving MIMO mechanism in LTE systems
( Institute of Electrical and Electronics Engineers Inc. , 2013 , Conference)Long Term Evolution (LTE) supports closed-loop MIMO techniques to improve its performance, but in order to exploit multiuser MIMO channel capabilities, the design of an efficient MAC scheme that supports Multiuser MIMO is ... -
Spatial opportunistic transmission for Quality of Experience satisfaction
( Elsevier , 2014 , Article)The capability of Multiple Input Multiple Output (MIMO) to deliver service simultaneously to more than one user is an exceptional characteristic for the cognitive radio (CR) communication. In this paper, statistical ... -
Power management in multiuser adaptive modulation transmission under QoS requirements
( wiley , 2013 , Article)A transmitter power management mechanism is presented in this paper where Multiple-Input Multiple-Output (MIMO) Multiuser Random Beamforming with Adaptive Modulation strategy is performed by the system. The objective of ... -
Distributed antenna systems for enhanced video transmission in LTE public safety networks
( IGI Global , 2013 , Book chapter)In this chapter, Long Term Evolution (LTE) for public safety is investigated. Particularly, Distributed Antenna Systems (DAS) are studied, and their impact on LTE public safety networks is analyzed. Furthermore, resource ... -
Long-term fairness in multi-cell networks using rate predictions
( IEEE , 2013 , Conference)Providing fair service to users in cellular networks is of significant importance to mobile operators. However, the geographic variability of network coverage and irregularity of user demand in space and time has made ... -
A new MAC design in LTE for MIMO multiuser schemes
( IEEE , 2013 , Conference)Long Term Evolution (LTE) supports closed-loop Multiple Input Multiple Output (MIMO) techniques, as a mechanism to improve system performance. An open topic since the appearance of MIMO is whether the feedback load, that ... -
Green operation techniques for large scale deployments of small cell LTE networks
( IEEE , 2013 , Conference)This paper investigates the large scale deployment of LTE small cell/femtocell networks. The interplay between the different small cell base stations (BSs) is studied in order to achieve the best user performance taking ... -
Enhancing the quality of experience of video streaming in LTE networks using distributed antenna systems
( IEEE , 2013 , Conference)Video transmission over long term evolution (LTE) networks is studied. The use of distributed antenna systems (DAS) is proposed to enhance the video quality of experience (QoE). Real time video streaming over both the ... -
A modified joint uplink-downlink opportunistic scheduling for Quality of Service guarantees
( IEEE , 2013 , Conference)Quality of Service (QoS) is a very important metric in wireless communication systems, where both Uplink (UL) and Downlink (DL) connections request strict QoS demands in terms of rate, delay, etc. for their proper operation. ... -
Enhanced connectivity in vehicular ad-hoc networks via V2V communications
( IEEE , 2013 , Conference)Vehicle to vehicle (V2V) communications to enhance the downlink and uplink connectivity in vehicular networks are studied. Effective rate formulations for the uplink and downlink directions are presented and analyzed, while ... -
Enhancing mobile video streaming by lookahead rate allocation in wireless networks
( IEEE Computer Society , 2014 , Conference)Developing novel video delivery mechanisms have become imperative to cope with the unprecedented growth in mobile video traffic. In this paper, we present video transmission schemes that improve the streaming experience ... -
Visual crowd analysis: Open research problems
( John Wiley and Sons Inc , 2023 , Article)Over the last decade, there has been a remarkable surge in interest in automated crowd monitoring within the computer vision community. Modern deep-learning approaches have made it possible to develop fully automated ... -
Realization of dual-hop networks in Wi-Fi direct and performance evaluation
( IEEE , 2017 , Conference)Wireless LANs are used as a common choice of Internet access at homes, offices, campuses and public areas such as airports and supermarkets. Wireless LANs support device-to-device (D2D) communication using ad-hoc mode, ... -
Multimodal Crowd Counting with Pix2Pix GANs
( Science and Technology Publications, Lda , 2024 , Conference)Most state-of-the-art crowd counting methods use color (RGB) images to learn the density map of the crowd. However, these methods often struggle to achieve higher accuracy in densely crowded scenes with poor illumination. ... -
Curriculum for Crowd Counting: Is It Worthy?
( Science and Technology Publications, Lda , 2024 , Conference)Recent advances in deep learning techniques have achieved remarkable performance in several computer vision problems. A notably intuitive technique called Curriculum Learning (CL) has been introduced recently for training ...
