A 40 Gbps electro-absorption modulator integrated laser modeling method for optical transmitter in ultra-wide band radio-over-fiber systems

2009 ◽  
Vol 1 (6) ◽  
pp. 511-519 ◽  
Author(s):  
Frédérique Deshours ◽  
Anne-Laure Billabert ◽  
Catherine Algani ◽  
Fabrice Blache ◽  
Christian Rumelhard ◽  
...  
Keyword(s):  
Orthogonal Frequency Division Multiplexing ◽  
Wide Band ◽  
Optoelectronic Device ◽  
Modeling Method ◽  
Ultra Wide Band ◽  
Design System ◽  
Large Signal ◽  
Fiber System ◽  
Optical Transmitter ◽  
The Impact

The great interest of optical fiber links in communicating systems especially in ultra-wide band (UWB) communications has grown up in the last decade and requires co-simulation for mixed circuits design exploiting both optical and microwave domains. In this paper, we report an original modeling method of an electro-absorption modulator associated with a distributed-feedback laser to simulate an optical transmitter of an UWB over fiber system. Large signal optoelectronic device models can be developed and implemented in a high-frequency simulator, such as advanced design system-Ptolemy to analyze the performances of fiber radio links and study the impact of the transmitter characteristics. This specific simulation way, taking into account precisely electrical characteristics of both electrical and optical circuits, links two different frequency domains by coupling electrical and optical modules in the same system simulator. Therefore, a complete simulation of an UWB multi-band orthogonal frequency division multiplexing signal transmission over fiber with an external modulator is investigated.

scholarly journals Design of a Low-Cost Indoor Navigation System for Food Delivery Robot Based on Multi-Sensor Information Fusion

Sensors ◽  
2019 ◽  
Vol 19 (22) ◽  
pp. 4980 ◽  
Author(s):  
Yunlong Sun ◽  
Lianwu Guan ◽  
Zhanyuan Chang ◽  
Chuanjiang Li ◽  
Yanbin Gao
Keyword(s):  
Information Fusion ◽  
Low Cost ◽  
Wide Band ◽  
Indoor Navigation ◽  
Ultra Wide Band ◽  
Steering Control ◽  
Labor Costs ◽  
Effective Manner ◽  
The Impact ◽  
Meal Delivery

As the restaurant industry is facing labor shortage issues, the use of meal delivery robots instead of waiters/waitresses not only allows the customers to experience the impact of robot technology but also benefits the restaurant business financially by reducing labor costs. Most existing meal delivery robots employ magnetic navigation technologies, which require magnetic strip installation and changes to the restaurant decor. Once the moving path is changed, the magnetic strips need to be re-laid. This study proposes multisource information fusion, i.e., the fusion of ultra-wide band positioning technology with an odometer and a low-cost gyroscope accelerometer, to achieve the positioning of a non-rail meal delivery robot with navigation. By using a low-cost electronic compass and gyroscope accelerometer, the delivery robot can move along a fixed orbit in a flexible and cost-effective manner with steering control. Ultra-wide band (UWB) and track estimation algorithm are combined by extended Kalman filter (EKF), and the positioning error after fusion is about 15 cm, which is accepted by restaurants. In summary, the proposed approach has some potential for commercial applications.

scholarly journals Impact of Delay Spread on IEEE 802.15.4a Networks with Energy Detection Receivers

2010 ◽  
Vol 8 (03) ◽  
Author(s):  
P. Medina ◽  
J. R. Gallardo ◽  
J. Sánchez ◽  
F. Ramírez-Mireles
Keyword(s):  
Bit Error Rate ◽  
Error Rate ◽  
Wide Band ◽  
Energy Detection ◽  
Ultra Wide Band ◽  
Delay Spread ◽  
Multiuser Interference ◽  
Ieee 802.15.4A ◽  
Industrial Environments ◽  
The Impact

This work analyzes the impact of delay spread on IEEE 802.15.4a networks using energy detection (ED) receivers.Specifically, we review the typical values for delay spread in Ultra Wide Band (UWB) systems reported to date for indoor, outdoor and industrial environments, and study how the delay spread impacts the bit-error rate with and without Multiuser Interference (MUI).

scholarly journals Ultra Wide Band Pulse Generation Using Advanced Design System Software

2013 ◽  
Vol 2 (02) ◽  
pp. 01-07
Author(s):  
Mr. Anish Dhabliya
Keyword(s):  
Short Pulse ◽  
Input Pulse ◽  
Wide Band ◽  
Radio Spectrum ◽  
Pulse Generation ◽  
Location Based Services ◽  
Ultra Wide Band ◽  
Design System ◽  
System Software ◽  
Advanced Design System

In radio spectrum, Ultra Wide Band is a defined as the technology which is used for short range communication with high bandwidth at low energy dimensions. Ultra Wide Band technology find its application in radar imaging, location based services and live tracking. The Objective of this paper is to generate UWB pulse. Here UWB pulse generation is simulated using Advanced Design System software. The operation output pulse are obtained in the interval of 10usec for input pulse train of 10usec ON state and 10usec of OFF state at low inductive values of UWB generation circuit. The oscillations are neglected by connecting high inductive value in UWB pulse generation circuit. The skipped output pulses are obtained for the input pulse with rise and fall time. Short pulse UWB pulse generation is simulated using schottky diode. The short pulse of 0.2usec with oscillations is obtained for the bit sequence short input pulse of UWB pulse generation circuit. 

On the Impact of Ultra Wide Band (UWB) on Macrocell Downlink of CDMA-PCS System

2006 ◽  
Vol 43 (2) ◽  
pp. 355-367
Author(s):  
Bazil Taha-Ahmed ◽  
Miguel Calvo-Ramón ◽  
Leandro Haro-Ariet
Keyword(s):  
Wide Band ◽  
Ultra Wide Band ◽  
The Impact

scholarly journals Use of Ultra Wide Band Real-Time Location System on Construction Jobsites: Feasibility Study and Deployment Alternatives

2020 ◽  
Vol 17 (7) ◽  
pp. 2219
Author(s):  
Waleed Umer ◽  
Mohsin K. Siddiqui
Keyword(s):  
Real Time ◽  
Manufacturing Industry ◽  
Wide Band ◽  
Ultra Wide Band ◽  
Small Scale ◽  
Construction Sites ◽  
Average Accuracy ◽  
Series Of Experiments ◽  
The Impact ◽  
Level Of Effort

Ultra wide band (UWB)-based real-time location systems (RTLSs) have been widely adopted in the manufacturing industry for tracking tools, materials, and ensuring safety. Researchers in the construction domain have investigated similar uses for UWB-based RTLSs on construction jobsites. However, most of these investigations comprised small-scale experiments using average accuracy only to demonstrate use cases for the technology. Furthermore, they did not consider alternative deployment scenarios for practically feasible deployment of the technology. To overcome these limitations, a series of experiments were performed to study the feasibility of a commercially available RTLS on the construction jobsites. The focus of the work was on feasibility in terms of accuracy analysis of the system for a large experimental site, the level of effort requirements for deployment, and the impact of deployment alternatives on the accuracy of the system. The results found that average accuracy was found to be a misleading indicator of the perceived system performance (i.e., 95th percentile values were considerably higher than average values). Moreover, accuracy is significantly affected by the deployment alternatives. Collectively, the results arising from the study could help construction/safety managers in decision making related to the deployment of UWB-based RTLSs for their construction sites.

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