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This paper presents a thorough analysis of energy consumption of a software HEVC decoder. The evaluation utilizes a framework developed herein specifically to estimate the energy consumption in all levels of cache hierarchies. Our framework is based on analytical models combined with memory profiling; tools. Energy analyses of several cache hierarchies executing HEVC decoding with different input...
Wireless localization systems are of great importance for a variety of modern applications. Recently, cooperation among agents (nodes with unknown positions) becomes attractive in localization networks, especially in the infrastructure-limited scenario. In many cases, synchronization of the agents' clocks to the anchors (nodes with known positions) has to be performed together with the localization...
Industrial applications for frequency modulated continuous wave (FMCW) radar systems often require the separation of close targets, which is limited by the available distance resolution of the radar. In general, for the evaluation of FMCW radar signals a fast Fourier transformation (FFT) based method is used. However, the FFT inherently limits the available distance resolution in dependence of the...
This paper investigates event-triggered H∞ filtering for networked Takagi-Sugeno systems with time-varying sampling periods. A new event-triggered transmission scheme (ETT scheme) is proposed to reduce network bandwidth utilization. Then, a synchronous fuzzy filter is introduced to estimate system real-time signals. Under the filtering framework with such a filter and the ETT scheme, the networked...
The bandwidth of the sampling systems, especially for time-interleaved analog-to-digital converters, needs to be extended along with the rapid increase of the sampling rate. A digitally assisted technique becomes a feasible approach to extend the analog bandwidth, as it is impractical to implement the extension in analog circuits. This paper derives accurate order estimation formulas for the bandwidth...
We develop a joint radar and communications performance bound by optimizing waveforms jointly for the simultaneous radar return and communications receiver. We develop radar waveforms that jointly maximize radar estimation rate and communications data rate for a shared spectrum. As an extension to our previous efforts, we consider a parametrically defined radar spectral weighting of the waveform,...
Millimeter wave (mm-wave) bands offer vast amounts of unlicensed and unused spectrum that could potentially be utilized by future (5G) wireless systems. Accurate channel characterization at mm-wave bands is required for system design and performance analysis of future 5G communication systems. Knowledge of delay and angle of arrival (AoA) of the incoming multipath components are especially important...
The rapid growth of available services depending on location awareness has led to a more and more increasing demand for positioning in challenging environments. Global navigation satellite system (GNSS) based positioning methods may fail or show weak performance in indoor and urban scenarios due to blocking of the signals and multipath propagation. In contrast, cellular radio signals provide better...
This paper presents two data fusion algorithms for use in an Orthogonal Frequency Division Multiplexing (OFDM) based Multiple Input Multiple Output (MIMO) radar network, comprising several radar nodes for area surveillance applications. Each node is able to estimate four parameters - 3D positions (range, azimuth and elevation) as well as the velocity of an arbitrary number of targets within one transmit...
Available bandwidth (ABW) estimation in wirelessnetworks is a critical issue for quality-of-service (QoS) provisioning. Nowadays, a network path often contains at least onewireless link e.g., mobile users having wireless connection to theInternet through laptop PCs or smartphones. Most of the existingtools for measuring ABW have been developed and evaluatedin wired networks. Since the characteristics...
In the Wireless Multimedia Sensor Networks (WM-SNs) field, real-time multimedia flow increases the probability of collision and congestion in sensor network which degrade the performance of Quality of Service (QoS). How to meet the high QoS requirement of WMSNs applications under the condition of energy constraint is a crucial issue. In this paper, we propose a predicted available bandwidth estimation...
This paper introduces a novel image error concealment technique, wherein the correlation among the correctly received pixels is implicitly exploited to recover the missing areas. This correlation is modeled as sparse representations of the correctly received surrounding areas of a lost regions, hence as a linear combination of very few atoms chosen from an over-complete dictionary. Under mild conditions,...
Received signal strength (RSS) based fingerprinting localization technique has been researched widely for the indoor location based services (LBSs) in recent years. However, the accuracy performance suffers from the time-varying characteristic of RSS due to the multi-path and shadow effect. In this paper, we propose a fingerprinting positioning system based on power delay profile (PDP). The system...
A power and bandwidth efficient resource allocation approach considering consumer's Quality of Experience (QoE) in the context of mobile video streaming is presented. Online QoE is estimated using Fuzzy Inference Systems. Compared to Quality of Service (QoS)-based techniques, the proposed QoE-enabled approach offers considerable saving in bandwidth and power.
HTTP Adaptive Streaming (HAS) is an adaptive bitrate streaming technique which is able to adapt to the network conditions using conventional HTTP web servers. An HAS player periodically requests pre-encoded video chunks by sending an HTTP GET message. When the downloading a video chunk is finished, the player estimates the network bandwidth by calculating the goodput and adjusts the video quality...
In vehicular networks, high mobility and limited transmission range of Road-Side Units (RSU) cause dynamic topological changes and result with interference occurred by transmission of vehicles. Moreover, due to the limited bandwidth of IEEE 802.11p based vehicular communication, providing a fair share of network resources among vehicles is essential for an efficient network management. Therefore,...
After several years of research towards sophisticated QoS measurement tools and methods, the results given to endusers by most commonly used on-line speed measurement tools are still far from being precise. In order to define a reliable Internet speed measurement methodology for endusers, the impact that the static and dynamic constraints of network nodes and TCP/IP implementations could impose must...
Quality of Service for Mobile Adhoc Network is one of the pioneering research areas and variety of routing protocols is introduced. However, those routing protocols is not support multiple routes by assigning priority according to their desired data rates. In this paper, Priority Aware Adhoc On Demand Multipath Distance Vector protocol is proposed in order to enhance the Quality of Service for Mobile...
SDN is a new approach to manage networks with a centralised, global view and control of the network, and a more fine grained and flexible approach to routing and forwarding of data packets. This has shown to achieve significantly increased network efficiency in a range of wired networks. SDN also has a great potential for wireless networks. One of the unique challenges of applying the SDN approach...
The recent development of multi-agent simulations brings about a need for population synthesis. It is a task of reconstructing the entire population from a sampling survey of limited size (1% or so), supplying the initial conditions from which simulations begin. This paper presents a new kernel density estimator for this task. Our method is an analogue of the classical Breiman-Meisel-Purcell estimator,...
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