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

27Jan/110

New Vector Signal Analysis Software from Agilent

Following to their Educational program the Agilent upgraded our DSAX91604A Infiniium High-Performance Oscilloscope with latest version of the 89601A Vector Signal Analyzer/Spectrum Analyzer software. This tool provides views of virtually every facet of a problem, helping to see the “why?” behind signal interactions. It includes the possibility to:

  • Test today’s signals and be ready for tomorrow’s with support for over 70 standards and modulation types.
  • See the “Why?” with advanced troubleshooting tools including high-resolution FFT-based spectrum measurements, time-domain tools, and bit-level modulation analysis.
  • View virtually every facet of complex signals - simultaneously - with 20:20 trace/marker capability.
  • Apply vector signal analysis virtually anywhere in your block diagram, including analog and digital baseband; IF, RF and microwave; narrowband to ultra-wideband; SISO and MIMO.

The software runs on a PC or inside PC-based instruments, and works with spectrum analyzers, signal analyzers, oscilloscopes, logic analyzers, and modular instrument systems, as well as simulation software. In system applications, the software can be controlled via the familiar remote SCPI programming language as well as .NET and .COM. Company web-site provides access to their Library of documentation, technical overview, application notes and video:

Well, it is time to play…

2Sep/100

Workshop “Waveform-Agile Radar: Signals, Algorithms, and Systems”

The European Microwave Week 2010, Paris, France

During the European Microwave Week 2010 at the end of September, the 7th European Radar Conference (EuRAD 2010), the major European forum to discuss the present status and the future trends in the field of radar technology and subsystems, radar system design and evaluation, and pertaining applications, will be held. This year this annual meeting will take place from 30 September to 1 October 2010 in Paris, France.

he 7th European Radar Conference (EuRAD) 2010In the frame of this conference we organize a workshop WHF01 "Waveform-Agile Radar: Signals, Algorithms, and Systems". At this workshop, top researchers-lecturers in the field of waveform agility will review the state of the art in the field of waveform diversity theory, radar waveforms' design, processing algorithms, and their implementation in modern radar systems, and discuss current and future applications of waveform diversity for radar. PARSAX radar system will be presented as an example of the flexible radar platform in which many aspects of waveform agility can be easily implemented.

The workshop will start October 1 at 13:40 in the Dupin 1 Room of the CNIT La Défense, Paris, France and includes three lectures:

  • Waveform Diversity: Past, Present, and Future
    by dr. Alfonso Farina, Selex, Italy
  • Space-Time Diversity and Coding for Active Antenna Arrays
    by Prof. dr. François Le Chevalier, Thales, France
  • PARSAX: Waveform-Agile Polarimetric Radar
    by dr. Oleg Krasnov, T.U Delft

There are still four weeks until this event ant the registration is still open. Welcome!

23May/100

Thematic Seminar: “The radars: from applications to the mathematical theory”

New Geometric Foundation of Radar Processing by Frédéric Barbaresco

Recently I've received from Frédéric Barbaresco information about thematic seminar: "The radars: from applications to the mathematical theory" ("Les radars : depuis la théorie mathématique jusqu'aux applications"), which took place in Poitiers, France, 5 Mai 2010. The presentations have been done in French, but a lot of interesting information on avalable slides is presented in English. In his own presentation dr. Barbaresco included nice introduction and review into concepts of the Information Geometry, the New Geometric Foundation of Radar Processing and their application to the radar data processing. Some of presented concepts and approaches (Covariance Matrix Mean/Median, Polarimetric Diffusive CFAR) can be directly implemented and tested in our study, during processing of the PARSAX polarimetric data.

11May/100

Processing of Dual-Orthogonal CW Polarimetric Radar Signals by Galina Babur

This day one year ago we were sitting in the Aula and distressed for the defense of the first PhD thesis, which has been done in the framework of the PARSAX project. It was Galina Babur who presented and successfully defended her thesis "Processing of Dual-Orthogonal CW Polarimetric Radar Signals".

The thesis consists of two parts. The first part is devoted to the theory of dual-orthogonal polarimetric radar signals with continuous waveforms.Processing of Dual-Orthogonal CW Polarimetric Radar Signals by Galina Babur The thesis presents a comparison of the signal compression techniques, namely correlation and de-ramping methods, for the dual-orthogonal sophisticated signals. The novel time-frequency representation of beat signals in frequency modulated continuous wave (FM-CW) polarimetric radar with simultaneous measurement of scattering matrix elements is shown. Since the sounding sophisticated signals usually have large time-bandwidth product, the observed object motion can result in specific bandwidth effects in the scattered signals. A novel wide-band correlation processing for overcoming the limitations due to these bandwidth effects is proposed for polarimetric radar signals. Also a novel wide band model of the de-ramped signals is described. The second part of the thesis is devoted to advanced processing in polarimetric radar with continuous waveforms (and focus on polarimetric FM-CW radar). A novel technique for continuous “quasi-simultaneous” measurement of the elements of the scattering matrix, which can provide high isolation level between the branches in the radar receiver channels, has been proposed in this PhD thesis. The ambition to increase the radar performance, namely to improve the radar range resolution, has led to the development of a novel flexible de-ramping processing applicable in single-channel and in polarimetric FM-CW radar. The problem of isolation in the polarimetric FM-CW radar receiver is especially acute. A novel method allowing to mitigate the problem is developed. The modeling results of the proposed method show its high efficiency. (Thesis’ abstract)

For those who interesting in the topic of radar polarimetry, the full text of this manuscript is available on-line at the TU Delft Institutional Repository.

2Mar/101

Software Defined Radar

The ElectroScience Laboratory in Ohio State University recently announced their new development - a software defined radar (SDR) platform that can adaptively switch between different modes of operation by modifying both transmit waveforms and receive signal-processing tasks on the fly.  High-speed analog-to-digital and digital-to-analog converters along with modern FPGAs and fast digital signal processors Software Defined Radar Architectureallow for maximum flexibility in algorithm design. Until this point their concept and development is very similar to our PARSAX radar. But if in the PARSAX radar the parallel coherent transmit and receive channels enable the exploration of simultaneous polarimetric information about radar objects, the multi-channel radar from Ohio has a few modes such as multiple-input multiple-output (MIMO) radar and polarimetric radar.  As for our group, the target phenomenology is one of research topics. Another area of study which will also be explored with SDR system is the urban propagation environment for radar.

The ESL Software defined radar features:

  • 500 MHz or greater waveform bandwidth
  • RF Frontend tunable from 1-18 GHz
  • High-speed Xilinx FPGAs and Texas Instruments 32-bit DSPs for implementing real-time signal processing
  • Information driven active sensing layer based on a game theoretic approach to sensor management implements competitive sensor tasking to control the selection of the current radar operating mode

 Sundance press release in PDF file