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Wavelet packet based multicarrier modulation for cognitive UWB systems
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Orthogonal frequency division multiplexing (OFDM) is a multi-carrier modulation (MCM) scheme where the sub carriers are orthogonal waves. The main advantages of OFDM are robustness against multi-path fading, frequency selective fading, narrowband interference

A novel UWB out-of-phase four-way power divider
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Abstract- A novel ultra-wideband ( UWB ) out-ofphase four-way power divider is presented. To achieve a division over a large frequency range, T-junctions formed by slotlines and microstrip lines are utilized. Based on the transmission-line equivalent-circuit method, we

Design of stair and slotted UWB antenna using stepped-feed with modified slotted ground plane
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ABSTRACT A modified design of an ultra-wide band antenna ( UWB ) using stepped feed, partial slotted ground, two level stairs with notches in patch and ground plane is simulated with band rejection feature. The enhanced frequency range (3.2 to 14.0 GHz) is covered by

Clusterization analyses of spatio-temporal UWB radio channels in line-of-sight and non-line-of-sight indoor home environments
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In this paper, spatio-temporal analysis of LOS and NLOS home environments based on the deterministic approach are presented. The detected paths were classified into several clusters by a heuristic approach. The identified clusters were determined from the physical

Design of microstrip antenna with defected ground structure for UWB applications
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In this paper a design of compact size microstrip antenna is presented that have its applications in UWB frequency range. The ground element of the proposed antenna is taken in the form of defected ground structure (DGS). The antenna is fed by a microstrip feeding

Distributed radio resource sharing with UWB radio
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Ultra Wide Band technology is rapidly maturing for multiple access communication purposes. By referring to Impulse Radio realization and to the classic link analysis of multicode time-hopping UWB multiple access schemes we focus on distributed algorithms to

A compact circular disc shaped monopole antenna for UWB applications
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This article presents a compact size UWB antenna with circular patch containing four L- shape and a circular slot for ultra wide-band ( UWB ) applications. Ground plane is also modified with diagonal edges, rectangular slot and I-shaped slots. It has found that the L

Impact of the number of fingers of a selective rake receiver for UWB systems in modified Saleh-Valenzuela channel
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The study for this paper focuses on searching the optimal number of fingers to be used by a Selective-Rake receiver using different ultra wideband systems. The presence of multipath fading has been taken into account using a modified Saleh-Valenzuela model. Coherent

A novel compact UWB antenna with triple band-notches for WiMAX/WLAN/ITU bands
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Abstract- A novel compact Ultra-Wideband ( UWB ) antenna with triple band-notched characteristics is presented. The antenna patch consists of several circular rings and a small circle. The antenna has a compact size of 25 20 mm which has been printed on a Rogers

Circular patch antenna with defected ground for UWB communication with WLAN band rejection
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The design and performance of coplanar waveguide fed modified circular patch antenna for possible application in ultra wideband communication systems with band rejection for upper wireless local area network band (5.15 GHz-5.85 GHz) is reported. This antenna is designed

On-line monitoring of transformer winding axial displacement using UWB sensors and neural network
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Abstract In this paper Ultra Wide Band ( UWB ) sensors and neural network has been used to detect the axial displacement of a simplified model of transformer. The proposed experimental setup for this method has been modelled using CST (Computer Simulation

Small microstrip low-pass filter by using novel defected ground structure for UWB applications
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Abstract- In this paper, a novel low-pass filter using defected ground structure (DGS) slot with a protruded T-shaped strip inside the slot is presented. The resonant frequency of the slot can be easily controlled by changing the protruded T-shaped strips dimensions, without

Design of triple band slot antenna for 802.11 a/b WLAN and upper UWB application using pentagon tuning stub
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A planar antenna with pentagon shaped tuning stub and asymmetric rectangular ground plane width along with wide rectangular aperture is presented for triple band operation. A novel concept of use of feed coupling slot as inherent band-notch at 4 GHz and design of

Analysis of the IEEE 802.15. 3a UWB channel model
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The IEEE 802.15. 3a standards body has developed a modification of the Saleh Valenzuela (SV) multipath channel model as the accepted channel model for ultra-wideband ( UWB ) investigations. The SV model is a well-defined simulation model that is straightforward to

UWB Channel Estimation Based on Distributed Bayesian Compressive Sensing
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In order to solve the high sampling rate issue in the multiuser UWB communication network system, we process the received signal with Bayesian compressive sensing. Using the characteristic that the wireless channels of multiuser signals which are received by one

DRB1. 3 third report on UWB channel models
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The aim of this document it to present an overview of some recent research activities on ultra wideband ( UWB ) channel modeling. Compared to models introduced in DRB1. recent research was focused on more sophisticated tools to model UWB channels, like information

Gain and bandwidth optimization of compact UWB tapered slot antennas
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Abstract− A method is presented which is aimed at increasing the gain and bandwidth of the tapered slot antenna by just finding the optimum tapering profile of the antenna without the need to increase its size. The result of the analysis indicates that a slightly negative tapering

UWB and EMP susceptibility of microprocessors and networks
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In this paper a statistical broad band approach for the description of the coupling of transient electromagnetic fields to PCB structures is given and validated through measurements. Additionaly the susceptibility of some choosen microprocessor boards and computer

A Kalman filtering channel estimation method based on state transfer coefficient using threshold correction for UWB systems
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Aimed at the divergence problem in the traditional Kalman Filtering (KF) channel estimation algorithm due to the inaccurate state transfer coefficient (STC), this paper proposes a novel KF channel estimation method using the STC with threshold correction. By setting a

Optimal design of 6.1 GHz UWB antenna for off body communication
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In this study report that the design of 61 GHz Ultra Wide Band ( UWB ) antenna for off body communication is fabricated and measured. The overall dimension of proposed antenna is 7* 4* l mm and mould by FR4 epoxy substrate material with dielectric loss tangent of 002. In CSE PROJECTS

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