| 1. |
|
|
| 2. |
- Aydogdu, Canan, 1978, et al.
(författare)
-
Radar Interference Mitigation for Automated Driving : Exploring Proactive Strategies
- 2020
-
Ingår i: IEEE signal processing magazine (Print). - Piscataway : Institute of Electrical and Electronics Engineers (IEEE). - 1053-5888 .- 1558-0792. ; 37:4, s. 72-84
-
Tidskriftsartikel (refereegranskat)abstract
- Autonomous driving relies on a variety of sensors, especially radars, which have unique robustness under heavy rain/fog/snow and poor light conditions. With the rapid increase of the amount of radars used on modern vehicles, where most radars operate in the same frequency band, the risk of radar interference becomes a compelling issue. This article analyzes automotive radar interference and proposes several new approaches that combine industrial and academic expertise toward the goal of achieving interference-free autonomous driving (AD). © IEEE.
|
|
| 3. |
- Aydogdu, Canan, 1978, et al.
(författare)
-
Radar Interference Mitigation through Active Coordination
- 2021
-
Ingår i: IEEE National Radar Conference - Proceedings. - : IEEE. - 1097-5659. ; 2021-May, s. 1-6
-
Konferensbidrag (refereegranskat)abstract
- Intelligent transportation is heavily reliant on radar, which have unique robustness under heavy rain/fog/snow and poor light conditions. With the rapid increase of the number of radars used on modern vehicles, most operating in the same frequency band, the risk of radar interference becomes an important issue. As in radio communication, interference can be mitigated through coordination. We present and evaluate two approaches for radar interference coordination, one for FMCW and one for OFDM, and highlight their challenges and opportunities.
|
|
| 4. |
- Blom-Nilsson, Marcus, Fil. dr, et al.
(författare)
-
Socionomers förutsättningar för ett systematiskt arbetssätt? : Organisatoriska hinder i arbetet med ASI Uppföljning
- 2023
-
Ingår i: Socialmedicinsk Tidskrift. - 0037-833X. ; 100:5, s. 666-678
-
Tidskriftsartikel (refereegranskat)abstract
- I det systematiserade arbetet med att följa upp hjälpbehov för personer med alkohol- eller narkotikaproblem har Addiction Severity Index uppföljnings-intervju (ASI U) en central funktion. I den här deskriptiva tvärsnittsstudien undersöker vi närmare hur demografiska, yrkesrelaterade och organisato-riska faktorer är relaterade till yrkesverksamma socionomers benägenhet att arbeta med ASI uppföljning. Studien omfattar 135 yrkesverksamma socionomer som arbetar med att utreda och följa upp hjälpbehov för personer med skadligt bruk eller beroende av alkohol eller narkotika. Bristande kompetens framträder som förenat med en lägre sannolikhet att arbeta med ASU upp-följning. För att öka medarbetares benägenhet att arbeta med ASU U bör chefer och andra personer i arbetsledande position ge medarbetare reella förutsättningar till fortbildning och vidareutbildning.
|
|
| 5. |
- Carvajal, Gisela, 1983, et al.
(författare)
-
Comparison of Automotive FMCW and OFDM Radar Under Interference
- 2020
-
Ingår i: IEEE National Radar Conference - Proceedings. - New York, NY : IEEE. - 1097-5659. ; 2020-September
-
Konferensbidrag (refereegranskat)abstract
- Automotive radars are subject to interference in spectrally congested environments. To mitigate this interference, various waveforms have been proposed. We compare two waveforms (FMCW and OFDM) in terms of their radar performance and robustness to interference, under similar parameter settings. Our results indicate that under proper windowing both waveforms can achieve similar performance, but OFDM is more sensitive to interference.
|
|
| 6. |
- Friel, Ross, Dr, 1982-, et al.
(författare)
-
3D Printed Radar Lenses with Anti-Reflective Structures
- 2019
-
Ingår i: Designs. - Basel : MDPI. - 2411-9660. ; 3:2
-
Tidskriftsartikel (refereegranskat)abstract
- Background: The purpose of this study was to determine if 3D printed lenses with wavelength specific anti-reflective (AR) surface structures would improve beam intensity and thus radar efficiency for a Printed Circuit Board (PCB)-based 60 GHz radar. This would have potential for improved low-cost radar lenses for the consumer product market. Methods: A hyperbolic lens was designed in 3D Computer Aided Design (CAD) software and was then modified with a wavelength specified AR structure. Electromagnetic computer simulation was performed on both the ‘smooth’ and ‘AR structure’ lenses and compared to actual 60 GHz radar measurements of 3D printed polylactic acid (PLA) lenses. Results: The simulation results showed an increase of 10% in signal intensity of the AR structure lens over the smooth lens. Actual measurement showed an 8% increase in signal of the AR structure lens over the smooth lens. Conclusions: Low cost and readily available Fused Filament Fabrication (FFF) 3D printing has been shown to be capable of printing an AR structure coated hyperbolic lens for millimeter wavelength radar applications. These 3D Printed AR structure lenses are effective in improving radar measurements over non-AR structure lenses. © 2019 by the authors. Licensee MDPI, Basel, Switzerland.
|
|
| 7. |
- Guarese, Renan, et al.
(författare)
-
A proposal for augmented situated visualization towards EMC testing
- 2020
-
Ingår i: CEUR Workshop Proceedings. - : CEUR-WS. ; , s. 12-15
-
Konferensbidrag (refereegranskat)abstract
- Copyright © 2020 for this paper by its authors.In EMC testing, 3D electromagnetic field data often needs to be visually analysed by an expert in order to detect product defects or unwanted interference between multiple devices. In this sense, the present work proposes the use of data visualization techniques allied to an Augmented Reality user interface to provide information that helps professionals to analyse the same data, however spatially situated where it was first measured. Apart from visualizing it, users may also interact with the data to narrow down their search by switching the attributes being displayed, combining them together, applying filters or changing the formatting in which data is presented. The approaches being proposed in this work will ultimately be tested against each other in comparable 2D and 3D interactive visualizations of the same data in a series of usability assessments with users to validate the solutions. The goal is to ultimately expose whether AR can help users to make more accurate decisions, particularly in EMC related tasks.
|
|
| 8. |
- Guarese, Renan, et al.
(författare)
-
Augmented situated visualization methods towards electromagnetic compatibility testing
- 2021
-
Ingår i: Computers & graphics. - Oxford : Elsevier. - 0097-8493 .- 1873-7684. ; 94, s. 1-10
-
Tidskriftsartikel (refereegranskat)abstract
- In electrical engineering, hardware experts often need to analyze electromagnetic radiation data to detect any external interference or anomaly. The field that studies this sort of assessment is called electromagnetic compatibility (EMC). As a way to support EMC analysis, we propose the use of Augmented Situated Visualization (ASV) to supply professionals with visual and interactive information that helps them to comprehend that data, however situating it where it is most relevant in its spatial context. Users are able to interact with the visualization by changing the attributes being displayed, comparing the overlaps of multiple fields, and extracting data, as a way to refine their search. The solutions being proposed in this work were tested against each other in comparable 2D and 3D interactive visualizations of the same data in a series of data-extraction assessments with users, as a means to validate the approaches. Results exposed a correctness-time trade-off between the interaction methods. The hand-based techniques (Hand Slider and Touch Lens) were the least error-prone, being near to half as error-inducing as the gaze-based method. Touch Lens also performed as the least time-consuming method, taking in average less than half of the average time required by the others. For the visualization methods tested, the 2D ray casts presented a higher usability score and lesser workload index than the 3D topology view, however exposing over two times the error ratio. Ultimately, this work exposes how AR can help users to have better performances in a decision-making context, particularly in EMC related tasks, while also furthering the research in the ASV field. © 2020 Elsevier Ltd
|
|
| 9. |
- Hagström, A. L., et al.
(författare)
-
An iterative approach to determine the refractive index of 3D printed 60GHz PLA lenses
- 2018
-
Ingår i: Proceedings of the 14th Loughborough Antennas and Propagation Conference (LAPC 2018). - Piscataway, N.J. : IEEE. - 9781785619694
-
Konferensbidrag (refereegranskat)abstract
- This paper describes an iterative approach to determine quasi-optical properties of standard 3D printer filament material to, in an inexpensive and fast way, construct focusing lenses for millimetre wave systems. Results from three lenses with different focal lengths are shown and discussed. The real part of the permittivity at 60GHz for polylactic acid (PLA) is in this paper determined to be εr=2.74. © 2018 Institution of Engineering and Technology. All rights reserved.
|
|
| 10. |
- Hellsten, Hans, et al.
(författare)
-
Multiple Access Radar Using Slow Chirp Modulation
- 2020
-
Ingår i: 2020 IEEE Radar Conference (RadarConf20). - New York, NY : IEEE. - 9781728189420 - 9781728189437 ; , s. 1-6
-
Konferensbidrag (refereegranskat)abstract
- The cohabitation of several radars, operating in the same frequency band, has become an essential and urgent topic as active safety systems for automotive applications are rolled out. An obvious concern is that mutual interference must be managed. Separating users in time, i.e. TDMA, achieves the required level of isolation in a straightforward way. CDMA techniques providing sufficient channel isolation are less obvious. The paper develops an alternative CDMA method, called Slow Chirp Modulation (SCM). SCM utilizes the full coherent integration time for transmission of a single aperiodic but ergodic signal, allowing target range and velocity to be retrieved but minimizing spectral occupancy. Spectral efficiency two orders of magnitude higher than for the discussed alternative methods is obtained, allowing more than a thousand non-interfering channels. Relying on indicated hardware schematics, the paper demonstrates the functionality of the novel signal processing algorithms, which are required for SCM. ©2020 IEEE
|
|
