Modal noise penalties for data communication links employing large area VCSELs

SpaceWire is a point-to-point bit shipping protocol for high-speed data communication links and networks providing equipment compatibility and seamless component reusability. It has found great application in many space missions reducing the development cost, offering architectural flexibility and improving reliability. This chapter delves into the standard describing the SpaceWire, focusing on the lower levels that play a key role in the electromagnetic behavior of the system and concern cable assemblies, shielding, bonding, and grounding. Findings regarding emissions affecting spacecraft components are presented as well as other EMC issues that have an impact on the system performance. Recent developments and upcoming updates to the standard are also presented and discussed.

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Optimization of multi-gigabit transceivers for high speed data communication links in HEP Experiments

Nuclear Instruments and Methods in Physics Research Section A Accelerators Spectrometers Detectors and Associated Equipment ◽

10.1016/j.nima.2019.02.030 ◽

2019 ◽

Vol 927 ◽

pp. 14-23 ◽

Cited By ~ 1

Author(s):

Shuaib Ahmad Khan ◽

Jubin Mitra ◽

Tushar Kanti Das ◽

Tapan K. Nayak

Keyword(s):

High Speed ◽

Data Communication ◽

Communication Links ◽

High Speed Data

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Infrared wireless DSSS system for indoor data communication links

10.1117/12.372815 ◽

1999 ◽

Author(s):

Jose Raul Vento-Alvarez ◽

Francisco J. Lopez-Hernandez ◽

Asuncion Santamaria ◽

Rafael Perez-Jimenez ◽

Jose A. Rabadan Borges

Keyword(s):

Data Communication ◽

Communication Links

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Performance Evaluation of Multi-UAV Network Applied to Scanning Rocket Impact Area

Sensors ◽

10.3390/s19224895 ◽

2019 ◽

Vol 19 (22) ◽

pp. 4895

Author(s):

Maurício R. Silva ◽

Elitelma S. Souza ◽

Pablo J. Alsina ◽

Deyvid L. Leite ◽

Mateus R. Morais ◽

...

Keyword(s):

Communication Network ◽

Communication Networks ◽

Network Architecture ◽

Design Procedure ◽

Data Communication ◽

Experimental Tests ◽

Network Nodes ◽

Communication Links ◽

Impact Area ◽

Multi Uav

This paper presents a communication network for a squadron of unmanned aerial vehicles (UAVs) to be used in the scanning rocket impact area for Barreira do Inferno Launch Center—CLBI (Rio Grande do Norte, Brazil), aiming at detecting intruder boats. The main features of communication networks associated with multi-UAV systems are presented. This system sends information through Wireless Sensor Networks (WSN). After comparing and analyzing area scanning strategies, it presents the specification of a data communication network architecture for a squadron of UAVs within a sensor network using XBee Pro 900HP S3B modules. A brief description is made about the initial information from the construction of the system. The embedded hardware and the design procedure of a dedicated communication antenna to the XBee modules are presented. In order to evaluate the performance of the proposed architecture in terms of robustness and reliability, a set of experimental tests in different communication scenarios is carried out. Network management software is employed to measure the throughput, packet loss and other performance indicators in the communication links between the different network nodes. Experimental results allow verifying the quality and performance of the network nodes, as well as the reliability of the communication links, assessing signal received quality, range and latency.

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Tele-Operated Mobile Robot for 3D Visual Inspection Utilizing Distributed Operating System Platform

International Journal of Vehicle Structures and Systems ◽

10.4273/ijvss.9.3.12 ◽

2017 ◽

Vol 9 (3) ◽

Author(s):

M.S.H. Achmad ◽

G. Priyandoko ◽

R. Roali ◽

M.R. Daud

Keyword(s):

Operating System ◽

Mobile Robot ◽

Critical Evaluation ◽

Data Communication ◽

Mapping Function ◽

Industrial Plant ◽

Large Area ◽

Localization And Mapping ◽

Plant Area ◽

The Way

This research examines how humans work with tele-operated unmanned mobile robots to perform interaction to do the inspection in industrial plant area to produce a 3D map for further critical evaluation. This experiment focuses on two parts, the way human-robot doing the remote interactions using robust method and the way robot perceives its surrounding environment as a 3D perspective map. Robot operating system (ROS) as a tool was utilized in the development and implementation of this research which comes up with robust data communication method in the form of messages and topics. RGBD simultaneous localization and mapping (SLAM) performs the visual odometry and mapping function simultaneously to construct 3D map using Kinect sensor. The results showed that the mobile robot-based tele-operated system utilizing RGBD SLAM for 3D inspection task under ROS environment are successful in extending human perspective in term of remote surveillance in the large area of the industrial plant.

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A Beam Broadening Method for Phased Arrays in Wireless Communications

10.21203/rs.3.rs-980108/v1 ◽

2021 ◽

Author(s):

Corentin Fonteneau ◽

Matthieu Crussière ◽

Bruno Jahan

Keyword(s):

Antenna Arrays ◽

Main Idea ◽

Beam Width ◽

Base Station ◽

Phase Shifters ◽

Large Area ◽

Steering Angle ◽

Quadratic Phase ◽

Communication Links ◽

Beam Broadening

Abstract 5G and IEEE 802.11ay introduce the use of the millimeter band as one promising solution to provide broadband wireless communication at multi-Gb/s user data rate. Due to the severe path-loss at such frequencies, it is generally assumed that large antenna arrays are used at the base station to steer narrow beams and build highly directionnal communication links towards the terminal points. However, broader and less directional beams are also of high interest in some of the steps involved in the establishment or the maintenance of the communication links. Indeed, search of a large area by narrow beams becomes too time consuming and link outage becomes more critical, thus affecting the latency and the robustness of the communications. A method enabling an adaptation of the beam widths is then worthwhile to consider. In this article, we investigate how narrow beams naturally produced by large antenna arrays can be broadened to adapt the beam width to a desired angular sector. We consider that the multi-antenna processing is performed by phase shifters on the radio-frequency stage since its digital counterpart is hardly feasible in practice at such high frequencies. The main idea of our systematic phase-only beam broadening technique relies on the determination of a quadratic phase excitation law from a desired beam width and steering angle. We first lead a thorough analysis of the radiation behavior regarding the coefficients of such quadratic excitation. We then propose a calculation method for determining the polynomial coefficients as a function of the desired beam width and steering angle. This non-iterative beam broadening method is described for boresight and non-boresight directions and is intended for discrete antenna arrays.

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