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Ultra-wide-band (UWB) is a promising short-range indoor wireless communication technology for large communication capacity, high transmission rate, low power consumption, etc. Multi-band orthogonal frequency-division multiplexing ultra-wide-band (MB-OFDM UWB) system can achieve much higher anti-noise...

UWB is a high data transfer rate , high-performance , low-cost , low-power short-range wireless communications technology data transmission but it is narrow in the use of non-sinusoidal pulse high-speed transmission of data , but also faced with many problems. Based on the characteristics of UWB communications...

The energy detection(ED) receiver is a practical solution for time of arrival (TOA) estimation in ultra wideband (UWB) ranging,Nevertheless,this method is vulnerable to the interference of noise and other wireless systems.In the study,we propose a novel method based independent component analysis(ICA)...

The design and analysis of an Ultra-Wideband (UWB) microstrip patch antenna with a modified inset feed and a semi-circular slot that is optimized for wireless communication are investigated in this research. With a large bandwidth spanning from 1.7 GHz to 9.69 GHz and resonance at 4 GHz, the suggested...

In transceivers, the main amplifier is the low-noise amplifier. It would be impossible to have a communication system without a low-noise amplifier (LNA). There are several techniques to optimize these LNAs, and they are available in a variety of formats. Achieving a low noise number in the current implementation...

A novel ultra-wideband ( UWB) antenna is proposed in this paper ,which has a band-notched characteristic for the interference between the UWB applications and the IEEE802.11a wireless local area network (WLAN) and the WiMAX /C-band with combination of notched structures. The proposed antenna fed by coplanar...

In the EMC interference environment of mine, we found the EMC is white noise and pulse interference. The UWB signal pulses is short and signal power spectral density distributed in wide band is very low. This article mainly proposes a de-noising method of Wavelet transform modulus maxima in signal band,...

Time reversal technique as an excellent channel equalization technologywhich can restrain multipath effectively to implementation time focusing and can improve the distribution of energy in space to implementation spatialfocusing.This paper aim to improve the shortcomings with poor accuracy of positioning,a...

A time domain (TD) hybrid solution based on uniform theory of diffraction-physical optics (UTD-PO) is presented to analyze the multiple diffraction under nonline-of-sight (NLOS) environment where an obstacle causes shadowing of the transmitter from the receiver in wireless sensor networks (WSNs). The...

The intelligent access control system based on UWB is designed in this paper. The system includes access controller, UWB reader array, electronic lock, power module, video capture modular and master computer. The access controller obtains the card’s information by UWB reader array , the staffs’ position...

In this paper, an ultra-low-power integrated RF front-end for UWB system is proposed. It contains a single-ended low noise amplifier (LNA) and a double balanced mixer. The resistive shunt feedback topology is employed to achieve a good input impedance matching in the whole UWB band. The stacked common-source...

Ultra Wideband (UWB: Ultra-Wideband) with high spatial resolution and positioning measurement, has the ability of suppressing the multi-path effect and penetration loss medium. It contains abundant target information in the received signal. The compressed sensing theory is introduced into the imaging...

By analyzing the principle of the UWB Ranging System, a mathematical model of the system is built, and then UWB signal models are chosen. By theoretical analysis, an important conclusion is drawn that signal processing of UWB ranging system is essentially time-domain sampling of echo signals. In the...

UWB signals are very suitable for localization, since their high time resolution can provide precise time of arrival (TOA) estimation. However, a major challenge in UWB signal processing is the requirement for high sampling rate. The theory of compressive sensing (CS) makes processing UWB signal at a...

The Ultra Wideband signal with multiple multipath component and use the Rake receiver can combine energy of multipath components. Using Rake reception, the performance of three kinds of receiving methods is compared with binary Ultra Wideband signal using the Maximal Ratio Combining (MRC), and got the...

Equal-gain combining (EGC) is a conventional linear combining scheme used in non-coherent energy detection receiver for ultra-wideband (UWB) signals. However, due to the nonlinear nature of decision boundary, the EGC results in a suboptimal test statistic. In this paper, we propose a new design for a...

With the development of society, the modern demand for location information acquisition is gradually rising, and people’s activities in indoor environments are also increasing. Indoor technologies such as Bluetooth and Wi-Fi can hardly meet the demand for high-precision indoor positioning, and thus cannot...

In order to meet requirements of three-dimensional (3D) indoor positioning in the environment with multipath interference and non-line-of-sight (NLOS) errors, this paper improves setting rules of trusted factors about ultra wide band(UWB) and the inertial navigation system(INS) to the indoor positioning...

Using IR-UWB technique to TT&C system can greatly improve the anti-interference performance of TT&C signal. Aiming at the IR-UWB signal using in TT&C system, its BER performance in single-tone interference is analyzed. At the same time, the effect on the anti-interference performance of each parameter...

The Doppler effect of UWB signal and the influence on Fuze receiver output signal is quite different from the sinusoidal narrow-band signal.It is necessary to find the relationship between the frequency of fuze receiver and the projectile target approaching velocity.The article study the time domain...

The Ultra Wide band (UWB) antennas play an important role in UWB system. As a crucial component of the UWB system, the UWB antennas affect performance of the system significantly and have advantages of low profile, low power consumption and integration easily, so they are widely used in communication...

The synchronization is the key problem of UWB system, because the non related systems of TR - UWB (Transmitted Reference Ultra - wide - band) evaded the problem of channel estimation, become a kind of hot technology. This paper put forward a kind of high precision synchronization algorithm, made the...

Aiming at the current common mainstream indoor positioning, this paper summarizes the basic positioning principles of WIFI, Bluetooth, UWB, inertial navigation, and visual SLAM methods respectively, and analyzes the possible problems and defects of each positioning method in specific different situations,...

During the rehabilitation training, the methods of gait analysis and planning are very important. We must consider the simplicity of implementation and the validity of method used. Combined with ultra-wideband wireless body area network, gyroscopes, acceleration sensors and TOA positioning technology,...

A novel UWB filter is proposed based on Split Ground Structure(SGS) in this paper. LC equivalent circuit of SGS is drew by analyzing its electric field, magnetic field and current distribution, giving its methods and formulas of SGS parameter extraction. Finally we give LC equivalent circuit of the entire...

Multi-UAVs close formation is the hot spot of current research. UWB (ultra-wide band) is very feasible to be applied to UAV relative positioning. In this paper, we propose to apply UWB technology to UAV relative positioning for multiple UAV close formations and consider combining UWB positioning with...

In order to avoid the mutual interference between UWB system and narrowband communication system, the ultra wide band antenna with notch characteristic on diamond shaped patch antenna is improved. The coplanar wave guide (CPW) feed structure and a larger groove rectangle etching on the ground and rhombus...

In this manuscript, we study about dielectric properties of major tissues in the breast within the UWB allocated frequency band. Some tissues mimicking phantoms have been designed and measured using slub-line tool system. The results obtained show good representation for both normal and malignant breast...

The combinations of MIMO (Multiple-Input-Multiple-Output) and UWB (Ultra-Wide-Band) systems greatly improve the performance of the UWB system. For the MIMO-UWB system, a new decoding scheme is proposed based on the STF (Space-Time-Frequency) coding and it can reduce the decoding complexity. The simulation...

For near range high resolution SAR (synthetic aperture radar) imaging, this paper presents an scheme for generating X-band LFMCW signal with 5.1GHz bandwidth based on YIG oscillator. The method is simple in structure and low in price, but introduces a certain degree of nonlinearity, resulting in range-resolution...

A novel compact asymmetrical coplanar waveguide (ACPW)-fed ultra-wideband (UWB) bandpass filter is proposed in this paper, and the application of multriresolution time-domain (MRTD) formulation technique to the modeling of UWB ACPW filter is facilitated. The numerical and measured results demonstrate...

This paper presents the design and simulation of a coplanar waveguide (CPW)-fed octagonal loop antenna using Ansys HFSS, specifically tailored for Internet of Things (IoT)-based healthcare applications. The proposed antenna operates over an extensive frequency range of 2.25–9.7 GHz, making it suitable...

This paper focuses on analyzing characteristics of the ultra-wideband (UWB) measurement positioning system model. To start with, problems facing the UWB measurement positioning system traditional model are briefly expounded. Concerning these problems, measures, including removing the fixed devices and...

This paper examines the rise of “New Painting” (新绘画) in post-millennium China, positioning it as a critical evolution beyond historical movements like Scar Art (伤痕艺术), the '85 New Wave (85新潮), and Political Pop (政治波普). Rather than a unified style or manifesto, New Painting embodies a radical subjectivity—a...

Photonic generation of UWB signals is the one of the key technology of UWB-over-fiber system. This paper proposes a method to generate UWB doublet signals utilizing the cross-phase modulation (XPM) in a semiconductor optical amplifier (SOA) in a NOLM. The simulation experiment based on the proposed method...

A short penetrating distance is a drawback of traditional ultra wideband radar systems. A pulse compression technique has been used in UWB radar systems to increase the penetrating distance. However, this leads to an increase in the blind zone. The paper proposes a new method to address this issue which...

The Ultra-Wideband antenna can effectively improve the system performance, such as range resolution, anti-jamming performance and complex target recognition. It is very important to study the UWB antenna. In this paper, the UWB antenna is discussed and studied, and the influence of antenna size miniaturization...

The article presents a new subject in the bachelor’s study of the Faculty of Mechanical Engineering at university UWB, bringing to students with basic knowledge of construction a comprehensive view of the design task. Software support is mentioned here, enabling students to more easily...

Based on the related generalization of Vague set algorithm of intuitionistic fuzzy theory, this paper applies it to UWB marine ship precision positioning technology, puts forward new research methods and calculation formulas, and constructs the similarity measure between them and obtains new formula...

Aiming at the core pain points of “multi-constraint, dynamic, and high-risk” in construction vehicle dispatching for large-scale building projects, an intelligent dispatching system integrating three core algorithms—multi-constraint path planning, dynamic avoidance, and multi-objective dispatching—was...

With the development of society, the population of aging has become increasingly prominent. Especially children do not live together with the elderly, when tumbles and other dangerous situations happen to the elderly who live alone in their own room, and their lives may be threatened for lack of timely...

The electric power system has the features of complexity and risk. When operating, workers often go into charged areas, touching charged equipment. That is dangerous. So this paper describes a personnel safety warning equipment for electric power system. The equipment not only provides safety warning,...

The Peranakan Etawah (PE) Goat demonstrated potential as a commercial dairy goat in tropical regions susceptible to heat stress. However, information regarding milk production and udder-teat morphology in PE goats was limited. This study aims to characterize udder-teat morphology and evaluate its relationship...

This paper presents an UWB planar printed compact monopole antenna comprising of U-shaped notch loaded with L-slot and tuning stubs. It has a partial ground plane to achieve an excellent impedance matching to increase the impedance bandwidth. The simulated results show that the proposed antenna exhibit...

The design of a very compact asymmetric coplanar strip (ACS) feed printed antenna with resonators for WiMax/WLAN applications is presented. The antenna is simply formed by a U-shaped slot embedded at the center of the asymmetric coplanar strip, rectangular split-ring resonator (SRR) embedded on the radiating...

Finite-resolution digital receiver is considered to be a potential solution to meet the severe demand of ADC that results from wideband of IR-UWB signal. However, the quantized distortion is totally different from full-resolution quantized signal. In this paper, the finite-resolution quantized signal...

Based on UWB positioning technology, an emergency training system for indoor radiation accidents is designed in view of the problems such as low level of actual combat in emergency training. The system can flexibly construct radiation accident scenarios required for emergency training through the combination...

According to the 60 GHz OFDM-UWB system of IEEE 802.15.3c standard, the characteristics of the preamble Golay complementary sequence are analyzed for better timing synchronization scheme that can resist multipath interference. The normalized autocorrelation method is used to detect the falling edge for...

In this paper, the band-notched characteristic inheritance in ultra-wide band (UWB) multiple input multiple output (MIMO) antenna array design is studied. First, the structure parameters and return loss of a monopole antenna are optimized to obtain desired UWB property. Then, the band-notched characteristic...

A Novel Miniaturized Vivaldi Antenna utilizing resonant structure to extend the low-end bandwidth limitation is presented in this paper. The low-end bandwidth limitation of the proposed antenna has extended to 2.45 GHz from the original 3.07 GHz. In addition, the gain of the proposed modified antenna...