Browsing by Author "Hamila, Ridha"
Now showing items 1-20 of 103
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A General Framework for Designing Sparse FIR MIMO Equalizers Based on Sparse Approximation
( Hamad bin Khalifa University Press (HBKU Press) , 2016 , Conference Paper)In broadband communications, the long channel delay spread, defined as the duration in time, or samples, over which the channel impulse response (CIR) has significant energy, is too long and results in a highly-frequency-selective ... -
A general framework for the design and analysis of sparse FIR linear equalizers
( Institute of Electrical and Electronics Engineers Inc. , 2016 , Conference Paper)Complexity of linear finite-impulse-response (FIR) equalizers is proportional to the square of the number of nonzero taps in the filter. This makes equalization of channels with long impulse responses using either zero-forcing ... -
A guaranteed performance of a green data center based on the contribution of vital nodes
( Institute of Electrical and Electronics Engineers Inc. , 2016 , Conference Paper)In order to satisfy the need for the critical computing resources, many data center architectures proposed to house a huge number of network devices. These devices are used to achieve the highest performance in case of ... -
A Novel OFDM Waveform with Enhanced Physical Layer Security
( IEEE , 2021 , Article)This letter proposes a secure orthogonal frequency division multiplexing (OFDM) waveform based on two physical-layer secrecy enhancing methods. The first method is time-domain pre-coding that involves interleaving and ... -
A Novel UAV-Aided Network Architecture Using Wi-Fi Direct
( Institute of Electrical and Electronics Engineers Inc. , 2019 , Article)The use of unmanned aerial vehicles (UAVs) in future wireless networks is gaining attention due to their quick deployment without requiring the existing infrastructure. Earlier studies on UAV-aided communication consider ... -
A regularization approach to MSE analysis of OFDM under phase noise
( Elsevier , 2018 , Article)Orthogonal frequency division multiplexing (OFDM) is widely used in broadband wireless communications systems because of its high resilience to frequency-selective fading and its low implementation complexity. Phase noise ... -
A sparsity-aware cooperative protocol for cognitive radio networks with energy-harvesting primary user
( IEEE , 2015 , Conference Paper)We consider a cognitive setting composed of multiple primary frequency bands each of which consists of a limited-battery energy-harvesting primary user and a secondary user. The primary user is equipped with a limited-capacity ... -
A survey of wireless data center networks
( IEEE , 2015 , Conference Paper)Data centers are becoming more and more popular for a wide variety of applications. However, the efficiency of data centers are restricted by many issues like cabling and maintenance problems in addition to performance ... -
A survey on data center network topologies
( Springer , 2018 , Conference Paper)Data centers are the infrastructures that support the cloud computing services. So, their topologies have an important role on controlling the performance of these services. Designing an efficient topology with a high ... -
A Survey on Mobile Edge Computing for Video Streaming: Opportunities and Challenges
( IEEE , 2022 , Article)5G communication brings substantial improvements in the quality of service provided to various applications by achieving higher throughput and lower latency. However, interactive multimedia applications (e.g., ultra high ... -
A threshold-based opportunistic MAC protocol for MIMO wireless sensor networks
( IEEE , 2012 , Conference Paper)In this paper, we consider a single-hop wireless sensor network where both the sensor nodes and the controller node have multiple antennas. We focus on single beam opportunistic communication and propose a threshold-based ... -
A USRP-based experimental testbed for OFDM systems impaired by I/Q imbalance
( IEEE , 2013 , Conference Paper)In this paper, an experimental testbed for packet based OFDM systems is proposed using USRP RF front-ends. I/Q imbalance estimation and compensation algorithms are implemented at the receiver by manually injecting I/Q ... -
Achievable Rates of Buffer-Aided Full-Duplex Gaussian Relay Channels
( Institute of Electrical and Electronics Engineers Inc. , 2017 , Article)We derive closed-form expressions for the achievable rates of a buffer-aided full-duplex (FD) multiple-input multiple-output Gaussian relay channel. The FD relay still suffers from residual self-interference (RSI) after ... -
Adaptative Network Topology for Data Centers
( Hamad bin Khalifa University Press (HBKU Press) , 2016 , Conference Paper)Data centers have an important role in supporting cloud computing services (such as email, social networking, web search, etc.) enterprise computing needs, and infrastructure-based services. Data center networking is a ... -
Advanced DSP Algorithms For Modern Wireless Communication Transceivers
(2019 , Dissertation)A higher network throughput, a minimized delay and reliable communications are some of many goals that wireless communication standards, such as the fifthgeneration (5G) standard and beyond, intend to guarantee for its ... -
Advanced packet scheduling for efficient video support with limited channel feedback on MIMO LTE downlink
( IEEE , 2011 , Conference Paper)Next-generation mobile networks will provide users with high data rates, increased mobility and various services. The initial step made in LTE and LTE-A is adopting the OFDM(A) air interface and utilization of dynamic ... -
Advancing Data Center Networks: A Focus on Energy and Cost Efficiency
( IEEE , 2023 , Article)Data centers serve as the backbone for cloud computing, enterprise services, and infrastructure-based offerings. One area of ongoing research in data center networking focuses on innovating new topologies for large-scale ... -
An energy saving mechanism based on vacation queuing theory in data center networks
( Springer , 2018 , Conference Paper)To satisfy the growing need for computing resources, data centers consume a huge amount of power which raises serious concerns regarding the scale of the energy consumption and wastage. One of the important reasons for ... -
Analysis of In-band Full-Duplex OFDM Signals Affected by Phase Noise and I/Q Imbalance
( Hamad bin Khalifa University Press (HBKU Press) , 2016 , Conference Paper)The idea of the simultaneous transmission and reception of data using the same frequency is a potential candidate to be deployed in the next generation wireless communications standard 5G. The In-Band Full-Duplex (IBFD) ... -
Beamforming OFDM Performance under Joint Phase Noise and I/Q Imbalance
( IEEE , 2015 , Article)Phase noise (PHN) and in-phase/quadrature (I/Q) imbalance are two major RF impairments in direct-conversion wireless transceivers. Beamforming and orthogonal frequency division multiplexing (OFDM) schemes have been adopted ...
