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Items from 1 to 20 out of 140 results

article

Higher order statistics applied to IR‐UWB system based on M‐OAM

Lamyae Maatougui, Laila Sakkila, Atika Rivenq Menhaj, Abdelowahed Hajjaji, more

International Journal of Communication Systems > 30 > 16 > n/a - n/a

In this paper, an original communication system based on the ultra‐wideband technology and dedicated to intelligent transport systems is proposed. The ultra‐wideband presents a promising option for short‐range wireless communication system due to the transmission of very short pulses with low energy. To ensure reliability, safety, and security in the road, the proposed system must provide high data...

chapter

Design of multiple orthogonal pulses for UWB radios using an iterative convex constrained l₁ minimization method

Niu Jiangli, Wu Qiong, Lai Xiaoping

2017 29th Chinese Control And Decision Conference (CCDC) > 5222 - 5227

2017 29th Chinese Control And Decision Conference (CCDC)

Considering the limitation of the U.S Federal Communications Commission (FCC)'s spectral masks and the coexistence with other wireless services, design of the pulse shape is vital to ultra-wideband (UWB) radios. Based on the classical Gaussian monocycle pulse which poorly fits the FCC spectral mask, this paper uses a digital finite impulse response (FIR) filter to synthesize a set of orthogonal pulses...

article

Design and investigation of sectoral circular disc monopole fractal antenna and its backscattering

Raj Kumar, Nagendra Kushwaha

Engineering Science and Technology, an International Journal > 2017 > 20 > 1 > 18-27

This article presents the design of sectoral circular disc fractal antenna. The proposed antenna has been excited using CPW – feed. The measured result of this antenna offers the ultra wideband characteristics from 3.265GHz to 15.0GHz. The measured and simulated results are compared and found in good agreement. The impedance match of the antenna throughout the band is improved by incorporating the...

chapter

A novel waveform with notched frequency band UWB communication system

Zhendong Yin, Shaoxue Wu, Zhenguo Shi, Zhilu Wu

2016 CIE International Conference on Radar (RADAR) > 1 - 3

2016 CIE International Conference on Radar (RADAR)

Recently, the UWB has attracted a lot of attention. In the UWB system, the interference from other narrow-band communication systems is a great challenge. To solve this problem, the frequency spectrums of Meyer wavelets are studied. And the combined waveform with notched frequency band is proposed in this paper. The frequency spectrum of the combined waveform is proved to be band-notched by the simulation...

article

Model-based super-resolution time-delay estimation with sample rate consideration

Foad Fereidoony, Mohammad Ali Sebt, Somayyeh Chamaani, Syed Abdullah Mirtaheri

IET Signal Processing > 2016 > 10 > 4 > 376 - 384

Time delay estimation is of great significance in multipath propagation to recover overlapped signals and identify the channel characteristics. However, achieving a high accuracy in this purpose may pose many problems in ultra-wideband (UWB) applications. In UWB systems, capturing a signal with high sampling rates cannot readily be done; hence classical methods for time delay estimation substantially...

chapter

Design of multilateral monopole planar antenna with rabbet structure for UWB applications

Cheng-Hsing Hsu, Chia-Hao Chang, Wan-Yu Hsieh, Ching-Fang Tseng, more

2015 Asia-Pacific Microwave Conference (APMC) > 2 > 1 - 3

2015 Asia-Pacific Microwave Conference (APMC)

A planar multilateral monopole antenna with rabbet structure for ultra-wideband (UWB) application is proposed and experimentally studied. By modified a rabbet structure on the multilateral patch, a UWB response has been is improved. The proposed antenna has wide impedance bandwidth from 2.4 GHz to more than 11 GHz with better than −10 dB return loss. The design is demonstrated assuming FR4 substrate...

chapter

Spectrum sensing applied to IR-UWB system based on M-OAM

Lamyae Maatougui, Hassan Ouahmane, Abdelowahed Hajjaji, Khadija Hamidoun, more

2015 Third World Conference on Complex Systems (WCCS) > 1 - 6

2015 Third World Conference on Complex Systems (WCCS)

Intelligent transport system (ITS) exploits new communication and information technologies to make existing infrastructures more effective and more reliable, it resets on functions associated with the intelligence. The use of the ultra-wideband (UWB) appears as a very suitable technology for this kind of applications, due to its large bandwidth, its resistance to the interferences with other radio...

chapter

Theoretical Analysis and Sensitivity Modeling of an Energy Detector for IR-UWB Applications

O. Ramos Sparrow, G. Jacquemod, S. Bourdel

2015 IEEE European Modelling Symposium (EMS) > 475 - 480

2015 IEEE European Modelling Symposium (EMS)

This paper deals with the theoretical andbehavioral modeling of a IR-UWB front-end system, usingMATLAB and ADS PTOLEMY simulators. The mainobjective of this paper is to make a comparative trial of thesensitivity of an integrator based energy detector and a lowpass filter based energy detector. We demonstrated that theuse of an integrator for the energy detector improve thesensitivity when several...

article

Design of a square ring shape slot antenna for UWB polarization–diversity applications

R.V.S. Ram Krishna, Raj Kumar

AEUE - International Journal of Electronics and Communications > 2015 > 69 > 9 > 1305-1313

In this paper, a dual polarized slot antenna for ultra wideband applications is proposed. The slot has an overall shape of a square ring whose four arms are identical and stepped rectangular. While two adjacent arms of the ring are microstrip fed and are responsible for the orthogonally polarized fields, the other two arms are introduced to make the structure symmetric and reduce the cross polarization...

article

Determination of Transformer Winding Radial Deformation Using UWB System and Hyperboloid Method

Hesam Rahbarimagham, Hossein Karami Porzani, Maryam Sadat Akhavan Hejazi, Mahdi S. Naderi, more

IEEE Sensors Journal > 2015 > 15 > 8 > 4194 - 4202

Online monitoring of the transformer winding using electromagnetic waves has recently been proposed for the detection of mechanical defects of transformer winding. In this paper, a new method, which uses the ultrawideband radar measurement results and is based on locus of objects in the space, is proposed for the 3-D positioning of transformer winding radial deformation location. The proposed experimental...

chapter

Intelligent receiver for M-OAM IR-UWB modulations system

Lamyae Maatougui, Khadija Hamidoun, Yassin El Hillali, Atika Rivenq, more

2015 4th International Conference on Advanced Logistics and Transport (ICALT) > 111 - 115

2015 4th International Conference on Advanced Logistics and Transport (ICALT)

Wireless technology for communication, represents a permanent and evolutionary need in transport field, motivated by the improvement of the efficiency and safety of transports.

article

Compact ultra‐wideband monopole antenna with enhanced bandwidth and dual band‐stop properties

Nasser Ojaroudi, Yasser Ojaroudi, Sajjad Ojaroudi

International Journal of RF and Microwave Computer‐Aided Engineering > 25 > 4 > 346 - 357

In this manuscript, a new design of ultra‐wideband (UWB) monopole antenna with dual band‐stop performance is proposed. The configuration of the antenna consists of a pair of coupled U‐ring structures as a radiating patch, and a modified ground plane with inverted T‐shaped strip and a pair of T‐shaped conductor‐backed plane. In the presented structure, by using an inverted T‐shaped strip and also by...

article

A modified ground apollonian ultra wideband fractal antenna and its backscattering

Raj Kumar, Pritam B. Nikam

AEUE - International Journal of Electronics and Communications > 2012 > 66 > 8 > 647-654

This paper presents the design of a modified ground apollonian ultra wideband (UWB) fractal antenna. The printed fractal antenna has been designed on a substrate with dielectric constant ɛ _r =4.3 and thickness h=1.53mm. The antenna has been fabricated with optimized dimension and tested. The experimental result of this antenna exhibits UWB characteristics from frequency range 3GHz to 18GHz...

article

On the design of inscribed pentagonal‐cut fractal antenna for ultra wideband applications

Raj Kumar, Prem Narayan Chaubey

Microwave and Optical Technology Letters > 53 > 12 > 2828 - 2830

The article presents the CPW‐feed inscribed pentagonal‐cut fractal antenna. This planar monopole antenna has been designed on low cost FR4 substrate of ε_r = 4.3 and thickness h = 1.53 mm. The proposed antenna has been fabricated with optimized dimension. The experimental result of this antenna exhibits the ultra wideband from 2.5 to 15 GHz. The antenna has been simulated using EM simulator based on...

chapter

Implementation of Spectrum Sensing Methods for UWB-Cognitive Radio System

Nazar Radhi, Sofian Hamad, H.S. AL-Raweshidy

2011 Fifth International Conference on Next Generation Mobile Applications, Services and Technologies > 142 - 147

2011 5th International Conference on Next Generation Mobile Applications, Services and Technologies (NGMAST)

In this paper, a number of spectrum sensing schemes implementation in ultra wideband and Cognitive radio component (UWB-CR) under different fading settings condition are studied. The sensing performance of different detectors is compared in conditions of probability of miss detection curves. Numerically simulation results are shown that the selection of detector rely on the scenario, the detector...

chapter

Design of a CMOS delay generator for RF UWB and time-domain systems

Rui Xu, C. Huynh, C. Nguyen

2011 IEEE International Symposium on Antennas and Propagation (APSURSI) > 3358 - 3360

2011 IEEE Antennas and Propagation Society International Symposium and USNC/URSI National Radio Science Meeting

A novel programmable high-precision delay generator with adjustable digital control for ultra-wideband and timedomain RF applications was designed. Ring oscillator based phase locked loop (PLL) is embedded to achieve desired propagation delay in the delay cell against process, temperature and power supply variations. A replica inverter delay line parallel to the PLL offers a separate delay path for...

chapter

A 2.76 mW, 3–10 GHz ultra-wideband LNA using 0.18 µm CMOS technology

Jin-Fa Chang, Yo-Sheng Lin

Proceedings of 2011 International Symposium on VLSI Design, Automation and Test > 1 - 4

2011 International Symposium on VLSI Design, Automation and Test (VLSI-DAT 2011)

A low-power (2.76 mW) common-gate (CG) low-noise amplifier (LNA) for ultra-wideband (UWB) systems using standard 0.18 μm CMOS technology is demonstrated. Instead of the traditional single parallel inductor (L_S1 only), we propose a new matching network consisting of a series L_S1-R_S1 in series with a parallel L_S2-RS₂ to enhance the input matching bandwidth. Flat and high S₂₁ was achieved by using the...

chapter

Design of a Low Noise Amplifier with integrated notch filter for interference rejection in ultra-wideband systems

N Koirala, R K Pokharel, A I A Galal, H Kanaya, more

2011 China-Japan Joint Microwave Conference > 1 - 4

2011 China-Japan Joint Microwave Conference (CJMW 2011)

A fully integrated 0.18um CMOS Low Noise Amplifier (LNA) with Notch Filter for interference rejection at 5-6 GHz in UWB systems is presented. The notch filter comprises a series LC resonance circuit, which with a resistance cancelation approach yields excellent attenuating characteristics. The post layout simulation of this circuit is able to achieve more than 25 dB of attenuation at 5.6 GHz. The...

article

A fully integrated low power PAM multi-channel UWB transmitter

Caixia Chen, Manh Anh Do, Kiat Seng Yeo, Chirn Chye Boon

Analog Integrated Circuits and Signal Processing > 2011 > 68 > 1 > 77-84

A new transmitter for ultra-wideband (UWB) impulse radio is described in this paper. The new UWB transmitter implements a low power Gaussian shaping filter to reduce the side-lobe in the frequency domain. A simple pulse amplitude modulation (PAM) circuit is used to keep the power consumption low. The proposed architecture features the simple design, low-power operation, and enables the pulse-shape...

chapter

Performance evaluation of OFDM de-modulator with various multiplier architectures for UWB system

Pui-wai Chan, Chiu-sing Choy

2010 IEEE Asia Pacific Conference on Circuits and Systems > 418 - 421

2010 IEEE Asia Pacific Conference on Circuits and Systems (APCCAS 2010)

In this paper the effects of multiplier architecture on the overall performance of the OFDM De-modulator for an UWB system are studied. The two commonly used VLSI multiplication algorithms, namely, the Baugh-Wooley algorithm and the Modified-Booth algorithm, are the candidates for this study. Partial product accumulation session can be found in both algorithms. There are two major classes of partial...

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UWB SYSTEM (140)
ULTRA WIDEBAND COMMUNICATION (101)
ERROR STATISTICS (27)
UWB (22)
BIT ERROR RATE (20)
ULTRA WIDEBAND TECHNOLOGY (20)
OFDM MODULATION (18)
CMOS INTEGRATED CIRCUITS (16)
OFDM (16)
INTERFERENCE (15)
INTERFERENCE SUPPRESSION (15)
RECEIVERS (15)
LOW NOISE AMPLIFIERS (14)
RADIO RECEIVERS (13)
BER (11)
ULTRA WIDEBAND ANTENNAS (11)
SIGNAL TO NOISE RATIO (10)
WIRELESS COMMUNICATION (10)
BANDWIDTH (9)
COGNITIVE RADIO (9)
GAIN (9)
IMPEDANCE MATCHING (9)
PULSE POSITION MODULATION (9)
SIGNAL DETECTION (9)
ULTRA-WIDEBAND SYSTEM (9)
DATA MINING (8)
FADING (8)
RADIOFREQUENCY INTERFERENCE (8)
ANTENNA RADIATION PATTERNS (7)
LEAST MEAN SQUARES METHODS (7)
LNA (7)
MULTIPATH CHANNELS (7)
NOISE (7)
NOISE FIGURE (7)
LOW-POWER ELECTRONICS (6)
MB-OFDM (6)
MODULATION (6)
MULTIBAND ORTHOGONAL FREQUENCY DIVISION MULTIPLEXING (6)
NOTCH FILTERS (6)
PHASE SHIFT KEYING (6)
SYNCHRONISATION (6)
TRANSMITTERS (6)
VOLTAGE 1.8 V (6)
WIRELESS LAN (6)
AWGN (5)
AWGN CHANNELS (5)
BAND PASS FILTERS (5)
DELAY (5)
DETECTORS (5)
FREQUENCY 3.1 GHZ TO 10.6 GHZ (5)
MONOPOLE ANTENNA (5)
NARROWBAND INTERFERENCE (5)
NOISE MEASUREMENT (5)
ORTHOGONAL FREQUENCY DIVISION MULTIPLEXING (5)
PERSONAL AREA NETWORKS (5)
RAKE RECEIVER (5)
SIMULATION (5)
SIZE 0.18 MUM (5)
SPREAD SPECTRUM COMMUNICATION (5)
ULTRA WIDEBAND SYSTEM (5)
ULTRA-WIDEBAND (5)
ULTRAWIDEBAND SYSTEM (5)
WIDEBAND (5)
WIMAX (5)
WIRELESS CHANNELS (5)
AD HOC NETWORKS (4)
ANTENNA MEASUREMENTS (4)
BIT ERROR PROBABILITY (4)
CHANNEL ESTIMATION (4)
CMOS (4)
CMOS TECHNOLOGY (4)
CODE DIVISION MULTIPLE ACCESS (4)
COPLANAR WAVEGUIDES (4)
ENCODING (4)
ESTIMATION (4)
INTERFERENCE (SIGNAL) (4)
INTERSYMBOL INTERFERENCE (4)
ITERATIVE METHODS (4)
LOW NOISE AMPLIFIER (4)
LOW-NOISE AMPLIFIER (4)
MICROSTRIP ANTENNAS (4)
MICROWAVE AMPLIFIERS (4)
NARROWBAND (4)
PERFORMANCE EVALUATION (4)
POLYNOMIALS (4)
PROBABILITY (4)
RESONANT FREQUENCY (4)
SYSTEM PERFORMANCE (4)
TRANSCEIVERS (4)
ULTRA WIDEBAND (4)
VOLTAGE 1.2 V (4)
WIRELESS SENSOR NETWORKS (4)
3G MOBILE COMMUNICATION (3)
ACCESS PROTOCOLS (3)
ANTENNA ARRAYS (3)
ARTIFICIAL NEURAL NETWORKS (3)
BROADBAND COMMUNICATION (3)
CHANNEL CAPACITY (3)
CMOS ANALOGUE INTEGRATED CIRCUITS (3)
COPLANAR WAVEGUIDE (3)
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Search results

Higher order statistics applied to IR‐UWB system based on M‐OAM

Design of multiple orthogonal pulses for UWB radios using an iterative convex constrained l₁ minimization method

Design and investigation of sectoral circular disc monopole fractal antenna and its backscattering

A novel waveform with notched frequency band UWB communication system

Model-based super-resolution time-delay estimation with sample rate consideration

Design of multilateral monopole planar antenna with rabbet structure for UWB applications

Spectrum sensing applied to IR-UWB system based on M-OAM

Theoretical Analysis and Sensitivity Modeling of an Energy Detector for IR-UWB Applications

Design of a square ring shape slot antenna for UWB polarization–diversity applications

Determination of Transformer Winding Radial Deformation Using UWB System and Hyperboloid Method

Intelligent receiver for M-OAM IR-UWB modulations system

Compact ultra‐wideband monopole antenna with enhanced bandwidth and dual band‐stop properties

A modified ground apollonian ultra wideband fractal antenna and its backscattering

On the design of inscribed pentagonal‐cut fractal antenna for ultra wideband applications

Implementation of Spectrum Sensing Methods for UWB-Cognitive Radio System

Design of a CMOS delay generator for RF UWB and time-domain systems

A 2.76 mW, 3–10 GHz ultra-wideband LNA using 0.18 µm CMOS technology

Design of a Low Noise Amplifier with integrated notch filter for interference rejection in ultra-wideband systems

A fully integrated low power PAM multi-channel UWB transmitter

Performance evaluation of OFDM de-modulator with various multiplier architectures for UWB system

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