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Faithfull detection of non-utilized spectrum hole in available channel is a crucial issue for cognitive radio network. Choosing the best available channel for a secondary user transmission includes settling on decision of accessible choices of free frequency spectrum based on multiple objectives. Thus channel judgment can be demonstrated as several objective decision making (MODM) problem. An ultimate...
In this paper, we propose a novel algorithm for primary user emulation attack detection and removal in cognitive radio networks, which are driven by chaotic tag-based sequencing for communication. Our proposed approach demonstrates the use of the look-up table-based challenge sequences which are monitored by the cognitive base station and act as the first line of defense against any primary user emulation...
This paper highlights the proposed design for a Dual band Fractal Monopole antenna using a Circular Split Ring Resonator and fed through a 50Ω inset feed over the Rogers RT/Duroid 5880tm substrate for the Wi-Fi and Wi-Max applications. The proposed antenna resonates at Wi-Fi frequency (2.4 GHz) and the Wi-Max frequency (3.5GHz). The proposed Antenna resulted in a Gain of 0.14dBi for 2.4GHz and 2.9dBi...
In this paper we are showing a financially savvy and effortlessly implementable i-voting (web voting) framework particularly for India in view of adhoc network. The essentials of cognitive radio innovation and Adhoc organize in view of cognitive radio technology are initially presented. The idea of smart i-voting framework is then proposed and how it can be executed in suburban region where web services...
In the present modern world, intelligent transportation is a necessary infrastructure. The scenario of intelligent transportation can be viewed by integrating IoT and cloud with connecting vehicular technology. Though the concept of connected vehicles, talking cars, driver-less cars exists from many years, research and development is still in progress. The important performance issues include road...
Mutual coupling is a critical issue in antenna elements is placed in the form of array between the antenna elements. In the present work Jerusalem cross periodic structure is proposed as an effective solution for reducing mutual coupling in a micro strip array antenna with more than one element. This structures have been Applied between the patches have been Simulated and verified with practical results.
A T-shaped Printed monopole antenna with low profile and fed by 50Q inset feed techniques on FR4 substrate is proposed which finds application in Wireless Local Area Network (WLAN). This project work aims in designing a compact uni-planar Antenna with high gain for Wireless applications using inset feed technique. This frequency 2.4GHz (2.256–2.687 GHz) shows that antenna is suitable for WLAN application...
This paper presents two new Schmitt trigger circuits with eight enhancement-type MOS transistors are introduced in this paper. These two Schmitt trigger circuits are implemented based on current sink and current source inverters. The hysteresis curves of the proposed Schmitt triggers are presented, hysteresis width depends on the supply voltage and transistor geometry. These circuits are preferred...
A (2×2) microstrip patch antenna array (MSPAA) is designed at 10 GHz., for low radar cross section (RCS) outside the operating band of the antenna in the frequency band from 16 GHz. to 26 GHz. The conventional ground plane of the MSPAA is modified by using a hybrid ground plane comprising Jerusalem cross slot (JCS) frequency selective surface (FSS) elements in a square grid. The optimized gain of...
A novel rasorber based on frequency selective surfaces (FSS) for dual functions operating as stealthy FSS radome for an antenna operating at 3.7 GHz with RF transparency bandwidth of 400 MHz and also as a thin capacitive circuit radar absorber in X band with Radar Cross Section Reduction (RCSR) of 10 dB (minimum) is described. The conducting backplane of rasorber is modified by using a metallic Jerusalem...
A novel Ultra Wide Band (UWB) dielectric Radar Absorber (RA) with weight and thickness constraints is presented in this paper. Radar reflectivity of − 10 dB (minimum) is realized in the frequency band from 2 GHz. to 32 GHz, for normal incidence. The panel type RA comprises four lossy frequency selective surface (FSS) layers, each based on circular patches in skewed grid lattice backed by RF transparent...
The objective of this paper is to design and to analyze the performance of Electromagnetic Band-Gap (EBG) antenna for wireless application through simulation. The proposed design is evaluated using the High Frequency Structure Simulator (HFSS). In our method, after comparing the results, we can say that the best obtained result is with respect to two layers FSS with cylinders having resonant cavity...
Multiple Input Multiple Output (MIMO) systems have recently emerged as a key technology in wireless communication systems for increasing both data rates and system performance. The Vertical Bell Labs Space-Time Architecture (V-BLAST) is one of the schemes, which can be applied to MIMO wireless system. This paper proposes signal detectors for V-BLAST architecture with Maximum Likelihood (ML), Zero-...
The V-BLAST (Vertically-layered Bell Laboratories Layered Space-Time) algorithm is a multilayer symbol detection scheme. The proposed work focuses on V-BLAST technique with a Multiple Input Multiple output (MIMO) technology followed by receiver detection techniques like Zero forcing (ZF), Minimum Mean Square Error (MMSE) with back substitution SIC (Symbol Interference Cancellation). The proposed methodology...
Steered Patch arrays with a dielectric lens for collimation are well suited for vehicular applications due to their small form factor and effective sealing ability. In this paper we present an accurate analytical formulation of a patch array radiating in the presence of a hemispherical Dielectric lens based on spherical modal expansion (SME) and experimentally demonstrate an increase in directive...
Multiple Input Multiple Output (MIMO) is a radio communication technology or RF technology that is being mentioned and used in many new technologies these days. The capacity of such a system depends on transmit and receive antenna strategies. The MIMO capacity scales roughly and linearly with the number of Transmitter and Receiver antennas. The two core approaches have been adopted to study the system...
Steered Patch arrays with a dielectric lens for collimation are well suited for mobile applications due to their small form factor and effective sealing ability. In this paper we present an accurate analytical formulation of a patch array radiating in the presence of a hemispherical Dielectric lens based on spherical modal expansion (SME) and experimentally demonstrate an increase in directive gain...
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