A5042602951- Cognitive Radio Networks and Spectrum Sensing
- Advanced MIMO Systems Optimization
- Wireless Networks and Protocols
- Wireless Communication Networks Research
- Advanced Wireless Network Optimization
- Indoor and Outdoor Localization Technologies
- Distributed Sensor Networks and Detection Algorithms
- Cooperative Communication and Network Coding
- Blockchain Technology Applications and Security
- IPv6, Mobility, Handover, Networks, Security
- IoT and Edge/Fog Computing
- Energy Efficient Wireless Sensor Networks
- Power Line Communications and Noise
- Mobile Ad Hoc Networks
- Cloud Data Security Solutions
- Opportunistic and Delay-Tolerant Networks
- Millimeter-Wave Propagation and Modeling
- Speech and Audio Processing
- Telecommunications and Broadcasting Technologies
- Radio Wave Propagation Studies
- Blind Source Separation Techniques
- Advanced Wireless Communication Techniques
- Sparse and Compressive Sensing Techniques
- Underwater Vehicles and Communication Systems
- Software-Defined Networks and 5G
Saints Cyril and Methodius University of Skopje
2014-2024
Information Technology University
2020
University of Ss. Cyril and Methodius in Trnava
2012
In the past few years, there has been significant progress made in area of blockchain. The use blockchain technology potential to revolutionize educational system by providing individuals with innovative and cost-effective ways learn, as well altering way teachers students work together. Additionally, can be utilized for issuing unchangeable digital certificates, it enhance present limitations existing certificate verification systems making them quicker, more reliable, independent central...
Cognitive radio networks challenge the traditional wireless networking paradigm by introducing concepts firmly stemmed into Artificial Intelligence (AI) field, i.e., learning and reasoning. This fosters optimal resource usage management allowing a plethora of potential applications such as secondary spectrum access, cognitive backbones, machine-to-machine etc. The majority overview works in field deal with notions observation adaptations, which are not distinguished aspect. Therefore, this...
Recent advances in radio environmental mapping enable novel practical and efficient cognitive dynamic spectrum access solutions. A crucial aspect of such solutions is to ensure the reliability constructed Radio Environmental Maps (REMs). Especially important accurate up-t
The location awareness is useful in many wireless networking solutions, such as cellular, ad hoc, self-organizing, cognitive radio networks, and so on. RSS-based, non-Bayesian source localization of particular interest, due to the presence RSS measurements all devices, well instantaneous estimations without extensive training learning phases. However, most RSS-based algorithms usually neglect problems arising from inherent network topology uncertainty. positions some measuring anchors,...
In this demonstration proposal we describe a prototype of radio environment map (REM) for storing and reasoning about spectrum data obtained from heterogeneous sources. The architecture the REM is both modular extendible, can be used with very diverse sensors, ranging high-fidelity analyzers to dedicated low-cost embedded solutions. proposed will illustrate how information such as transmitter locations estimates occupancy over space time inferred made available through REM, based on network...
Detection performance of cognitive radios can be significantly improved by utilizing Higher Order Statistics (HOS) in the spectrum sensing process. The additional usage goodness-of-fit tests on inspected frequency further improve signal detection. This letter proposes a novel detection method that uses skewness and kurtosis FFT power (empirically derived) to evaluate existence. Testbed evaluations prove adapts specific hardware noise characteristics. result is powerful performance, i.e....
Most cooperative spectrum sensing research activities focus on maximizing the primary user detection and neglect achieved secondary system performance. This paper proposes a novel capacity-aware optimization method, capable of computing optimal values for parameters (e.g., number sensed samples, cooperating devices, control channel bandwidth) so that capacity is maximized. The proposed method utilizes energy with estimated noise power (ENP). We derive experimentally validate analytical...
Estimation of radio environments is a novel method for efficient management spectrum resources in future wireless networks. It allows insight into the field, interference and possible geo-locations various field transmitters. This paper compares three spatial interpolation techniques capable estimating using limited number measurements. Comparisons are conducted with extensive simulations indoor outdoor scenarios.
This letter introduces an RSS-based framework (termed Source Position Estimation for Anchor position uncertainty Reduction - SPEAR) joint estimation of the positions a wireless transmitter source and corresponding measuring anchors. The exploits imprecise anchor information using non-Bayesian employs novel Joint Maximum Likelihood (JML) algorithm reliable agent estimations. It proposes to use iterative Trust Region (TR) strategy as solution JML nonlinear minimization problem. Simulation...
Spectrum sensing is a fundamental feature of cognitive radio technologies facilitating detection and localization spectrum opportunities. Combined with centralized database storage, it fosters reliable spatial measurements Radio Environmental Maps (REMs) construction that can provide an accurate insight in the utilization over time, space frequency. The process often combines different devices capabilities. This paper introduces novel REM platform integrates several mid- low-end into single...
In this paper we report on spectrum use measurements carried out synchronously over the period of 48+ hours in seven European cities. Special care has been placed harmonizing measurement settings and equipment so as to obtain comparable data possible. We describe detail s
Transmitter localization is a widely and extensively addressed topic in the area of wireless networks. Its broad usage various applications, such as sensor networks, cognitive radio, military communications etc., continuously drives need for more robust, flexible efficient solutions. The Received Signal Strength (RSS) based methods are most popular due to their simplicity applicability on off-the-shelf radio hardware. Most current work targets only theoretical performance assessment with...
This paper analyses and compares three different models for Machine-to-Machine (M2M) traffic investigates the possibility of integrating generated M2M into a Long Term Evolution (LTE) network. According to authors' knowledge, current assume that 1) is aggregated with constant arrival rate 2) cellular networks have enough resources support traffic. However, neither nor are true in networks. variable under assumption LTE network has limited resources. The results showcase characteristics more...
Spectrum sensing is an important consideration in the future cognitive radio networks. In order to protect communicating users, it essential make a reliable and correct occupancy decision. A possible way providing more accurate measurement adapt parameters inspected band signal. Parameters settings for resolution bandwidth sweep time are technology dependent should be different detecting various signal types frequency domain. This paper presents practical setup using two of spectrum...
Policing a wireless network is an evolving and exciting paradigm, specially emphasized with the emergence of cognitive radio networks. The possibility to manage resources efficiently achieve different goals imposed by stakeholders dynamically changing policies in main advantage policy based system. Moreover, ability express variety types for purposes allows high system flexibility adaptability. This paper presents novel reasoning architecture networks elaborates on its functionalities...
Blockchain nowadays is finding great application in many areas, based on its security, decentralized mode of operation, however things during use remain challenging include the issue data privacy, such as safe and effective management, maintaining integrity quality, etc. Through this paper we will try to make an overview existing blockchain technologies, their today sublimating future trends. We briefly describe technology various fields suggesting solutions, advantages disadvantages...
Resources, especially in wireless networking context, are considered to be scarce and deficient. Appropriate management of resources is crucial for efficient networks' usage users' satisfaction. This paper elaborates on the resource issues Wireless Heterogeneous Networks (WHNs). It explains market business cases heterogeneity reflects most common radio frameworks envisioned today. Furthermore, pinpoints two network architectures, i.e. RIWCoS ARAGORN architecture, designed deal with under...
The problem of multi-source localization in lognormal fading is addressed. A Gaussian-Mixture Model (GMM) proposed as an approximation the measured signal strengths from various sensors space, parameterized by positions and transmission (Tx) powers sources. iterative Expectation-Maximization algorithm invoked for estimation relevant GMM parameter set. complexity grows only linearly with number sources, a major advantage comparison direct Maximum Likelihood approach. When sources unknown,...