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Several well-known simple behavioral models for solid state power amplifier (SSPA) devices are reviewed and compared. This paper proposes an improvement to White et al's model and discusses their use of the Rapp model for AM/AM and AM/PM device modeling. Furthermore an improvement to Honkanen & Haggman's phase shift addition to Rapp's model is given thus allowing phase shifts greater than zero...
Agents technology plays an important role in the development of many major service applications. However, balancing between the flexible features agents provide, and their vulnerability to many security oriented attacks are considered a great challenge. In this paper we review trust models that are proposed in the literature to provide trustworthiness and security to Multi Agent Systems (MAS). We...
This paper presents an efficient power management unit (PMU) that supports μWatt load range for TEG-based applications. The PMU consists of an inductor-based DC-DC converter that boosts a small TEG voltage and followed by two switched capacitor-based buck converters which are used to drive a μWatt-SoC. The PMU generates a regulated 1.1V and 0.6V output voltages. Pulse frequency modulation scheme is...
Next generation 400Gbps and 1Tbps per wavelength optical transmission system will require the use of high spectral efficiency optical modulation schemes. Rather than wireless communication system, laser phase noise (PN) has a major impact on the performance of optical systems due to high speed of communication and high order modulations recently proposed/demonstrated in these communication systems...
A theoretical study was conducted to investigate the contributions of an individual fiber mode in mode-filtering techniques for enhancing bandwidth-distance product. The study used standard single mode fiber (SMF) for visible light communication over fiber (ViLiCOF). In the worst fiber dispersion at 405nm and at 637nm wavelengths, the standard SMF supports 10 and 4 linearly polarized modes respectively...
This paper discusses a technique used to insert a watermark into scanned colored PDF files. The watermarking aims to protect the copyright ownership and authenticate the PDF documents. A logo has been used as a robust watermark for copyright. The logo will be embedded in the green channel of the file. This watermark can be successfully extracted and it can survive against different attacks. Any manipulations...
With the increase in popularity of bandwidth intensive applications, the telecommunication companies have been driven to find alternatives for the existing digital subscriber line (DSL) infrastructure to meet the requirements of the subscribers. Fiber To The Home (FTTH) networks, based on the Giga Passive Optical Network (GPON) topology, have been proven to be a cost effective solution for a large...
A Treebank is a linguistic resource that is composed of a large collection of manually annotated and verified syntactically analyzed sentences. Statistical Natural Language Processing (NLP) approaches have been successful in using these annotations for developing basic NLP tasks such as tokenization, diacritization, part-of-speech tagging, parsing, among others. In this paper, we address the problem...
Mobile eLearning are capable to avail children in improving learning capabilities, self-consciousness living, and profession growth. They can inspire the perfection of eLearning with the diverse subservient smart handled devices. Most available software applications that are attainable by children are done without taking in consideration their needs and specific deficiency. We have investigated Arabic...
Electronic text (e-text) stylometry aims at identifying the writing style of authors of electronic texts, such as electronic documents, blog posts, tweets, etc. Identifying such styles is quite attractive for identifying authors of disputed e-text, identifying their profile attributes (e.g. gender, age group, etc), or even enhancing services such as search engines and recommender systems. Despite...
This paper presents implementation of the firefly algorithm adapted for solving hierarchical multi-objective radio frequency identification (RFID) network planning problem. This problem belongs to the group of hard optimization problems since it employs many objectives and constraints. Firefly algorithm has been proven as a robust algorithm for solving such tasks. We used hierarchical approach where...
Next generation few mode fibers (FMF) promise to substantially increase the spectral efficiency of existing state-of-the-art optical communication networks by an order of magnitude [1]. In FMF, individual propagating modes are considered as independent optical communication channels that carry separate streams of data. The performance of these communication streams however, suffers from inter channel...
In recent years the number of automobiles have been increased on the roads. Due to high density of vehicles, the potential threats and road accidents are increasing. Alongside new application domains are evolving such as infotainment. VANETs is an emerging technology where the information is exchanged among the vehicles on the road to provide updates about different road situations and dangerous conditions,...
Multiple-input multiple-output (MIMO) radar systems have received much attention in recent times due to their ability to detect and estimate targets better. These radar systems utilize multiple transmit waveforms, either orthogonal or non-orthogonal, providing additional diversity to improve on delay-Doppler as well as angular resolutions. Recent advances in Compressive Sensing (CS) offer an effective...
Recently, mobile network operators (MNOs) around the world are migrating their networks to the fourth generation (4G) long-term evolution (LTE) standard. Mobile virtual network operator (MVNOs), who do not have their own wireless access network and still offer added value services, are affected with this migration. Most of the research conducted about network migration toward the 4G focused on challenges...
This paper introduces the design of 8×8 patch antenna array with polarization and space diversity for the future fifth generation (5G) of cellular networks. The antenna element is a rectangular patch with a single spatial feed and designed to have dual linear polarization. The proposed 8×8 array also has dual-orthogonal polarization and therefore built-in polarization diversity. The polarization isolation...
Bio-electric signals are all kinds of electrical signals that can be measured and monitored from biological beings. These signals are of low frequency and very low voltage and are often contaminated with surrounding noise. Hence the bioelectric signal acquisition system should provide very high input impedance, very high Common Mode Rejection ratio (CMRR), high voltage gain and high selectivity. To...
This paper investigates the random walk within the PageRank1 algorithm used by Google and other search engines. It begins by explaining how the Random Walk works with the Markov Chain. Based upon this, the paper then presents how specific locations on the matrix form graph cycles. These cycles are capable of controlling pagerank queues and moves these rank value from one online webpage to the next...
For most real-world biometric identification applications, the training database size could be very large, i.e. in the range of several thousands. This yields to the curse of dimensionality problem. The downside of such a problem is that it could negatively affect both the identification performance and speed. In this paper we use Exploratory Projection Pursuit (EPP) methods to determine clusters...
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