PARSAX An Informal Look at Radar Technology and Applications within TU Delft

13Dec/130

One more call for papers

Enhanced Surveillance of Aircraft and Vehicles (ESAV’14)

Tyrrhenian International Workshop
on Digital Communications
Rome, Italy, 15 and 16 September 2014

Dear Colleagues and friends,

The Advanced Workshop on Enhanced Surveillance of Aircraft and Vehicles, ESAV’14, will be held in Rome from 15 to 16 September 2014 in the frame of the TIWDC (Tyrrhenian International Workshop on Digital Communications) series.

The main goal of this event - coordinated with the ESAVS series held in Germany and managed by the DGON - is to create a forum for presentation of research and development results - as well as for the exchange of ideas between experts from academia, industry, operators and regulating bodies - in all fields of the Surveillance and related technologies and system aspects, with special attention to the air traffic and to the airports.

We are pleased  to invite you to participate to this Workshop and to present the recent results from you and your group.

IMPORTANT DATES

Abstracts Submission Deadline - February 23, 2014
Acceptance/Rejection Notification  - April 15, 2014
Early registration at reduced-price  - May 31, 2014
Submission of camera-ready papers  - June 15, 2014
Event in Romes  - September 15-16, 2014

GENERAL CHAIRMAN   Gaspare Galati
CO-CHAIRMAN and TPC CHAIRMAN  Piet van Genderen
LOCAL COMMITTEE Mauro Leonardi, Sergio Pandiscia, Gabriele Pavan, Emilio G. Piracci
ORGANISED BY  University of Rome "Tor Vergata”, Ass. Vito Volterra, CNIT
IN CO-OPERATION WITH Centro Vito Volterra, EUMA, IET, AFCEA, AICT, IEEE, AESS
GOLD SPONSOR  National Instruments
SPONSOR Selex ES

SUBMISSIONS

The papers will be accepted on the basis of a peer review of a substantial abstract, a pdf-formatted file in two-three pages, including: title, authors and their affiliation, short - 30 to 50 words -abstract, a 800 to 1000 words text, the significant original results shown in a few drawings or tables, and finally the main references.

Procedures to submit a paper, as well as more details on registration, venue, transport and accommodation, can be found at http://radarlab.uniroma2.it/esav.htm

VENUE

The Angelicum Conference Centre – Largo Angelicum, 1 - 00184 Roma, is located in the heart of historic Rome within a very short distance of the city's most famous landmarks such as Mercati  Traianei and Torre delle Milizie, Colonna Traiana, Fori di Cesare, Nerva e Traiano, Foro Romano, Piazza Venezia, Colosseo.

With kind regards and best wishes for Christmas and the New Year

Gaspare Galati, general chairman
Piet van Genderen, co-chairman and TPC chairman

3Dec/130

6th International Summer School on Radar/SAR Systems (04-11 July 2014)

Today I received an announcement of the 6th International Summer School on Radar/SAR Systems (04-11 July 2014) from our Fraunhofer FHR's colleagues. They ask to circulate the invitation to suitable candidates and to post it on prominent notice-boards in your institute/university/laboratories.

sar-summer-schoolIf you are interested, you can download high resolution versions of  Poster and Flyer.

Fraunhofer FHR, one of Europe's leading radar research institutes and has pioneered radar and SAR research and development over the decades, is pleased to announce the 6th International Summer School on Radar/SAR, which will take place from 04-11 July 2014 in the picturesque Upper Middle Rhine region (Haus Humboldtstein). We cordially invite students, PhD candidates, post-docs and anyone else eager to broaden and deepen their understanding of radar and SAR techniques to participate in our summer school.

The highly positive feedback of previous participants showed that there is a strong interest for events that brings together young scientists to study and learn whilst at the same time building networks and forging new friendships that will lead to future collaborations. The Summer School posses a proper balance between lectures, practical workshops and leisure activities that are an essential component for creating and sustaining an atmosphere conducive to learning and for binding with new colleagues.

Internationally renowned experts from across Europe, USA and Canada make up the summer school lecture team. This is a unique opportunity to gain an in-depth appreciation of modern radar and SAR systems whilst absorbing the multifarious atmosphere of the famous Upper Middle Rhine region. Participation in the programme of social activities with the international group of attendees will inspire and enrich your learning experience.

Synopsis of lecture programme of the 5th International Summer School on Radar/SAR:

  • Radar fundamentals (Dr. M. Weiß, Fraunhofer FHR, Germany)
  • Radar Remote Sensing (Dr. P. Rosen, JPL/NASA, USA)
  • Bistatic & Distributed Radar (Prof. H. Griffiths, UCL, United Kingdom)
  • SAR fundamentals (Prof. P. Lombardo, University la Sapienza, Italy)
  • Short Range Imaging (Prof. M. Sato, Tohoku University, Japan)
  • Antennas (Prof. D. Heberling, RWTH-Aachen, Germany)
  • Moving target recognition (MTI/GMTI) (Dr. C. Gierull, DRDC, Canada)
  • SAR interferometry (Dr. G. Fornaro, IREA, Italy)
  • Compressed Sensing with Radar (Prof. J. Ender, Fraunhofer FHR, Germany)

During the ISS the participants will be split into several workshop groups. With assistance and guidance of international experts each group works on a different problem. On Friday they will present their solution to all other students of the summer school.

Outside of the lecture theatre there will be ample time for other activities, such as enjoying the surrounds of the beautiful Rhine Valley, visiting the vibrant cities of Cologne and/or Bonn. Summer school participants will also be taken on a technical tour of the Fraunhofer FHR institute, which is located nearby.

Due to the kind sponsorship from Cassidian (an EADS company) we can offer the summer school, inclusive full board and lodging, for only 600 Euro for students, 900 Euro for Ph.D. candidates, and 1200 Euro for all others.

Fraunhofer FHR cordially invites appropriate candidates to visit our website  for further information and to download the Application form. Specific queries regarding the summer school should be addressed to Matthias Weiß.

12Apr/110

Nokia Smartphone with Embedded Radar

Smartphone with radar function

Manufacturers of cellular phones like to embed gadgets into their most unusual devices – from electric shavers and lighters to portable projectors. A new step in this direction was
made by the engineers of the Finnish company Nokia, equipping the device with radar.

The device, named “mobile radar”, performs the same function as the common traffic police radar – it measures the distance, direction and speed of a moving object. During the presentation, the mobile phone has successfully identified the direction and speed of walking of an ‘experimental object “- one of the staff members of Nokia Research Center.

One of the possible applications of the unusual feature can become the remote control of the phone, – said Nokia Conversations. This radar differentiates even the hand movements and allows, for example, to increase or decrease the volume of a built-in player with mere gestures.

It should be noted that the control of the surrounding space is made without the participation of the camera, by only electromagnetic waves.

Therefore, mobile radar “can be used without taking the phone out of the pocket or backpack. It recognizes even objects that are behind a wooden door.

Radar is just one of more than 40 inventions, over which works the company’s research center at present time. All of them are aimed at improving and expanding the functions of mobile communication, but not all will be transformed into real serial devices, said The Independent. In particular, the company says nothing about the expected deadline, when its phones can have their own radars.

Source

 YouTube Preview Image

YouTube Preview Image

10Oct/100

Envelope-tracking technology can double efficiency of RF power amplifiers

This information, which can be interesting for further radar technology development, came from last MathWorks News & Notes.

Power amplifiers (PAs) ensure that the source radio frequency (RF) signal, such as a DVB, 3G, LTE, or 4G signal, is powerful enough for transmission. Because PAs use a fixed supply voltage, they draw maximum power whatever the amplitude of the signal, making them notoriously inefficient for amplitude modulated RF signals.

Envelope-tracking technology can double a PA’s efficiency from 30% to 60% or more by dynamically modulating the amplifier’s supply voltage according to the RF signal passing through the device.

Nujira’s High Accuracy Tracking (HAT™) technology, the first practical implementation of envelope tracking, is being used or evaluated for cellular infrastructure and terminals, broadcast transmitters, military communications and other applications. It is featured in three product lines: Coolteq.L for mobile handsets, Coolteq.h for cellular base stations, and Coolteq.u for DVB transmitters. We used MathWorks tools across the entire development life cycle of these product lines, from research, through modulator design, to verification and automated testing.

 

Envelope-tracking technology
Figure 1. Left: Power amplifiers with a fixed supply voltage.
Right: Supply voltage modulated using envelope tracking. 

Conventional PAs waste as much as 80% of the energy they consume as dissipated heat. The PAs in a cellular base station, for example, account for half the total power consumed.

Although it was first described more than 60 years ago, envelope tracking has not been applied commercially until recently, largely due to the difficulty of implementing a power supply modulator that meets the efficiency, bandwidth, and noise requirements of wideband signals such as multicarrier WCDMA, WiMAX, or DVB.

Nujira’s envelope tracking technology can double the efficiency of PAs and dramatically reduce power dissipation, which lowers energy bills and substantially reduces the amount of cooling required (Figure 1). It also enables higher device output power, allowing broadcasters to extend the range of existing broadcasting towers. Lastly, the wide-band operation of Nujira’s technology enables broadcasters to use fewer PA designs to cover their target broadcast spectrum.

Full information can be found using the link to MathWorks web-page or PDF file

 

4Jun/100

Video Lectures from MIT Lincoln Laboratory

Introduction to Radar Systems

Dr. Robert M. O’DonnellThis set of 10 lectures is presented by Dr. Robert M. O'Donnell. It starts with an introductory description of basic radar concepts and terms.  The radar equation needed for the basic understanding of radar is then developed, along with several examples of its use in radar system design.  Radar propagation issues, such as attenuation, multipath effects and ducting, are described.  The concept of radar cross-section, waveform design, antennas, transmitter and receiver characteristics and the detection of radar signals in the presence of noise are presented. Some radars are required to detect small targets in the presence of much larger radar echoes from sea or land "clutter" in the radar's coverage.  The characteristics of this "clutter" are discussed, along with moving target indicator (MTI) and Pulse Doppler techniques for mitigating the negative effects of "clutter."  The course continues with lectures covering target tracking and target parameter estimation. The last lecture discusses radar transmitters and receivers.

Click on titles below to the view the lectures and/or download the pdf files of the viewgraghs for each lecture.

  1. Introduction
  2. Radar Equation
  3. Propagation Effects
  4. Target Radar Cross Section
  5. Detection of Signals in Noise and Pulse Compression
  6. Radar Antennas
  7. Radar Clutter and Chaff
  8. Signal Processing - MTI and Pulse Doppler Techniques
  9. Tracking and Parameter Estimation
  10. Transmitters and Receivers

Adaptive Antennas and Phased Arrays

Dr. Alan J. FennThis lecture series, given by Dr. Alan J. Fenn, begins with a discussion of the fundamentals of adaptive antennas pertaining to radar and communications systems, with an emphasis on consumption of adaptive array degrees of freedom from the jammer's viewpoint.

Displaced phase center antenna array mutual coupling effects in the problem of adaptive suppression of radar clutter is discussed in Lecture 2. Next, in Lectures 3 through 5 a theoretical foundation for a focused near-field technique that can be used to quantify the far-field adaptive nulling performance of a large aperture adaptive phased array system is described. Simulations of focused near-field and focused far-field nulling performance for adaptive arrays are presented for arrays of isotropic elements in Lecture 3 and for arrays including mutual coupling effects in Lectures 4 and 5. Experimental testing of the focused near-field adaptive nulling technique for phased arrays is described in Lecture 6. An experimental high-resolution multiple-beam adaptive-nulling antenna system is described in Lecture 7. Lectures 8 through 16 then concentrate on phased array antenna development for a variety of array elements. Lecture 8 provides an introduction to phased array antenna theory. In Lecture 9, finite and infinite array analyses and measurements for periodic phased arrays of monopole elements are presented. Lecture 10 describes the focused near-field polarization characteristics of monopole phased arrays as related to adaptive array testing in the near field. Next, in Lecture 11 a test bed phased array that implements the displaced phase center antenna technique, as related to the analysis presented in Lecture 2, is described along with the planar near field testing technique that is used to assess adaptive clutter cancellation performance. The planar near field scanning method for measuring low-sidelobe radiation patterns of phased arrays is described in Lecture 12. Experimental arrays of horizontally polarized loop-fed slotted cylinder antennas (Lecture 13), dual-polarized dipole arrays (Lecture 14), and ultrawideband dipole arrays (Lecture 15) are described. In Lecture 16, rectangular waveguide arrays are analyzed by the method of moments.

Click on titles below to the view the lectures and/or download the pdf files of the viewgraghs for each lecture.

Lectures Overview for Adaptive Antennas and Phased Arrays

  1. Adaptive Antennas and Degrees of Freedom
  2. Array Mutual Coupling Effects on Adaptive Radar Clutter Suppression
  3. Focused Near-Field Techniques for Evaluating Adaptive Phased Arrays
  4. Moment Method Analysis of Focused Near-Field Adaptive Nulling
  5. Focused Near-Field Testing of Multiphase-Center Adaptive Array Radar Systems
  6. Experimental Testing of Focused Near-Field Adaptive Nulling
  7. Experimental Testing of High Resolution Nulling with a Multiple Beam Antenna
  8. Phased Array Antennas - An Introduction
  9. Monopole Phased Array Antenna Design, Analysis, and Measurements
  10. Monopole Phased Array Field Characteristics in the Focused Near-Field Region
  11. Displaced Phase Center Antenna Measurements Using Near-Field Scanning
  12. Low-Sidelobe Phased Array Antenna Measurements Using Near-Field Scanning
  13. Arrays of Horizontally Polarized Omnidirectional Elements
  14. Finite Arrays of Crossed V-Dipole Elements
  15. Experimental Ultrawideband Dipole Antenna Array
  16. Finite Rectangular Waveguide Phased Arrays