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Radar Signal Processing

Members

Activities

The vision of this research unit is that signal processing can enhance the performance of a system, and in particular of radar systems.

The research interests are in the fields of array processing, bistatic radars including bistatic imaging and passive radars.

Research projects

Belsar

In preparation for the SAOCOM-CS satellite, which is a receive-only satellite ajoined to the SAOCOM SAR imaging satellite, an airborne measurement campaign is conducted in order to assess the relevance of different bistatic geometries and the associated issues.

In particular, the role of the Royal Military Academy is to develop requirements for the synchronisation between the transmitter and the receiver, as they will be located on different platforms. The effect of mis-synchronisation will also be modeled and evaluated.

Road Radar

In collaboration with industry and the ULB, the goal is to develop a multichannel radar able to detect trafic.

RMA is more specifically involved in the array processing, the detection algorithms and the tests.

SCIRoCCo

The Scatterometer Instrument Competence Centre's (SCIRoCCo) objective is to become a reference center for the international meteorological agencies, meteorological operations centers, and the research and educational community worldwide for the exploitation of the ERS Scatterometer mission data set and of the present and future C-band scatterometer missions data sets. RMA's tasks are to carry out research and development activities in the area of C-band scatterometer inter and cross sensors calibration, processing algorithms for the computation of the radar backscattering, data validation and data quality control, education and outreach.

In addition, the provision of travel grants is foreseen.


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Radar interferometry using opportunistic transmitters

The goal of the study is to assess the feasibility of radar interferometry using radar images produced using transmitters of opportunity.

PhD Osama Mahfoudia

Study of opportunistic DVB-T radars, and more specifically, how to optimize the signal to noise ratio in order to improve detection.

SENSAR

The SENSAR project aims at assessing if and how high resolution soil moisture can be extracted from SAR images at high resolution. One of the key components of the project is the large scale in-situ measurements and a model-based inversion from backscatter to dielectric constant. As a side-product of that inversion, soil roughness information is obtained and that can then be used as a hint to assist in the inversion of the SAR data. The RMA is in charge of the SAR image processing and of part of the inversion process.

Home Radar

Het onderzoek bestaat er precies in het detecteren van de beweging van een voorwerp (een hand) voor de sensor. In tegenstelling tot meeste radiometrisch toepassingen waar de absolute schijnbare temperatuur gemeten wordt, is het hier de bedoeling om snelle schijnbare temperatuursverschillen te meten. Door gebruik te maken van een netwerk van antennes en door de relatieve evolutie van de schijnbare temperatuur gemeten op de verschillende antennes, moet de richting van de beweging te bepalen zijn.

MUSAR: Study on Multistatic opportunistic SAR

The aim of the project is the development of a “proof of concept” passive SAR imaging system with a static receiver. The research activities are naturally divided in two parallel branches with strong interaction between them: the development of the synthesis algorithms and the development of the required hardware.

TOSCA

The scope of this procurement of the ESA is to guarantee the maintenance and the evolution of the Scatterometer data processor prototype and the Scatterometer calibration tool (TOSCA). More notably it involves a study of the cross-calibration of the scatterometer on-board ERS-2 with the scatterometer on-board METOP.

Space Situation Awareness (SSA)

This project aims at defining the technical configuration of a “European system for Space Situation Awareness”, which answers in an optimal way the “European Union Statement of Need” and deducing from it a list of research projects to be launched.

Publications

  1. Edison Cristofani, Osama Mahfoudia, Mathias Becquaert, Xavier Neyt, François Horlin, Nikos Deligiannis, Johan Stiens, and Marijke Vandewal. Compressive Sensing and DVB-T-Based Passive Coherent Location. In 26th URSI Benelux Forum, Brussels, Belgium, 2017. URSI.
  2. V. Kubica, X. Neyt, and H. D. Griffiths. Improved cross-range resolution in SAR imaging using a bistatic configuration. In URSI 2017 Benelux Forum, Brussels, BE, February 2017.
  3. V. Kubica, X. Neyt, and H. D. Griffiths. Validation of the increased image resolution obtained using TOPSAR Sentinel-1 data in a bistatic setup. In PIERS proceedings, Singapore, November 2017.
  4. Osama Mahfoudia, François Horlin, and Xavier Neyt. An Improved Channel Estimation Scheme for DVB-T Passive Radars. In URSI Benelux Forum, Brussels, Belgium, 2017.
  5. Osama Mahfoudia, François Horlin, and Xavier Neyt. On the feasibility of DVB-T based passive radar with a single receiver channel. In IET International Conference on Radar Systems (Radar 2017), Belfast, UK, 2017.
  6. Osama Mahfoudia, François Horlin, and Xavier Neyt. On the static clutter suppression for DVB-T based passive radars. In URSI GASS, Montreal, Canada, 2017.
  7. Osama Mahfoudia, François Horlin, and Xavier Neyt. Optimum reference signal reconstruction for DVB-T based passive radars. In 2017 IEEE Radar Conference (RadarConf), Seattle, USA, 2017.
  8. V. Kubica. Opportunistic radar imaging using a multichannel receiver. PhD thesis, University College London, 2016.
  9. V. Kubica, X. Neyt, and H. D. Griffiths. Along-track resolution enhancement for bistatic SAR imaging in burst-mode operation. IEEE Transactions on Aerospace and Electronic Systems, 52(4):1568-1575, August 2016.
  10. Osama Mahfoudia, François Horlin, and Xavier Neyt. Target detection for DVB-T based passive radars using pilot subcarrier signal. In 37th WIC Symposium on Information Theory in the Benelux, 2016.
  11. V. Kubica, H. D. Griffiths, and X. Neyt. High cross-range resolution bistatic SAR imaging in wide-swath illumination modes. In URSI 2015 Benelux Forum, Enschede, NL, December 2015.
  12. V. Kubica, X. Neyt, and H. D. Griffiths. Improved cross-range resolution in TOPSAR imaging using Sentinel-1A in bistatic operation. In IEEE International Radar Conference, pages 117-122, Arlington, VA, May 2015.
  13. Osama Mahfoudia and Xavier Neyt. Analysis of Direct Signal Recovery Scheme for DVB-T Based Passive Radars. In 36th WIC Symposium on Information Theory in the Benelux, Brussels, Belgium, 2015.
  14. Osama Mahfoudia and Xavier Neyt. Strong direct-path interference removal for DVB-T based passive radars. In URSI Benelux Forum, Enschede, Netherlands, 2015.
  15. M. R. Ardekani, X. Neyt, D. Benedetto, E. Slob, B. Wesemael, P. Bogaert, C. Craeye, and S. Lambot. Soil moisture variability effect on GPR data. In Proceedings of the 15th International Conference on Ground Penetrating Radar, pages 214-217. IEEE, June 2014.
  16. Anis Elyouncha and Xavier Neyt. Analysis of C-band spaceborne scatterometer thermal noise. In Proc. SPIE 9240, Remote Sensing of the Ocean, Sea Ice, Coastal Waters, and Large Water Regions, Amsterdam, 2014.
  17. Anis Elyouncha and Xavier Neyt. Comparison of the spatial and radiometric resolution of ERS and Metop C-band radars. In Proceedings of SPIE Remote Sensing of the Ocean, Sea Ice, Coastal Waters, and Large Water Regions, Amsterdam, 2014.
  18. V. Kubica, X. Neyt, and H. D. Griffiths. Opportunistic high cross-range resolution imaging using TOPSAR illuminations of Sentinel-1. In URSI 2014 Benelux Forum, Louvain-la-Neuve, BE, December 2014.
  19. Osama Mahfoudia and Xavier Neyt. A DVB-T based passive radar using one USRP board. In URSI Benelux Forum, Louvain-la-Neuve, Belgium, 2014.
  20. M. Nottebaere, M. R. Ardekani, S. Lambot, and X. Neyt. SAR-image derived soil moisture enhancement using GPR data. In Proceedings of the 15th International Conference on Ground Penetrating Radar, pages 223-226, June 2014.
  21. Martijn Nottebaere, Mohammad Reza Mahmoudzadeh Ardekani, Sébastien Lambot, and Xavier Neyt. Soil moisture patterns characterized by GPR help enhancing SAR-image derived surface soil moisture. In Proceedings of the 20th URSI Benelux Forum, November 2014.
  22. A. Elyouncha and X. Neyt. Inter-calibration of Metop-A and Metop-B scatterometers using ocean measurements. In Remote Sensing of the Ocean, Sea Ice, Coastal Waters, and Large Water Regions, Dresden, 2013.
  23. Anis Elyouncha and Xavier Neyt. C-band Satellite Scatterometer Inter-calibration. IEEE Transactions on Geoscience & Remote Sensing, pages 1-14, 2013.
  24. V. Kubica and X. Neyt. Feasibility of resolution-enhanced burst-mode interferometry in bistatic SAR. In Proceedings of IEEE Conference on Radar, Adelaide, South Australia, September 2013.
  25. K. Kulpa, P. Samczynski, M. Malanowski, L. Maslikowski, and V. Kubica. The use of CLEAN processing for passive SAR image creation. In Proceedings of IEEE Radar Conference, Ottawa, Ontario, Canada, May 2013.
  26. Raffaele Crapolicchio, Giovanna De Chiara, Anis Elyouncha, Pascal Lecomte, Xavier Neyt, A Paciucci, and Marco Talone. ERS-2 Scatterometer: Mission Performances and Current Reprocessing Achievements. IEEE Transactions on Geoscience & Remote Sensing, 50(7):2427-2448, July 2012.
  27. Anis Elyouncha and Xavier Neyt. A method for cross-comparison of scatterometer data using natural distributed targets: application to ERS-1 and ERS-2 data during the tandem mission. In Proceedings of SPIE Remote Sensing of the Ocean, Sea Ice and Large Water Regions 2012, volume 8532. SPIE, September 2012.
  28. V. Kubica and X. Neyt. Cross-range resolution enhancement in burst-mode SAR in bistatic operation. In URSI 2012 Benelux Forum, page 32, Brussels, BE, September 2012.
  29. V. Kubica and X. Neyt. Passive SAR imaging using the ASAR instrument of ENVISAT as transmitter of opportunity.. In Proceedings of the 9th European Conference on Synthetic Aperture Radar, pages 275-278, Nuremberg, Germany, April 2012.
  30. V. Kubica and X. Neyt. ScanSAR resolution enhancement in bistatic operation. In IET International Radar Conference, pages 1-6, Glasgow, UK, October 2012.
  31. D. W. O'Hagan, A. Capria, D. Petri, V. Kubica, M. Greco, F. Berizzi, and A. G. Stove. Passive Bistatic Radar (PBR) for harbour protection applications. In Proceedings of IEEE Radar Conference, pages 446-450, Atlanta,GA, May 2012.
  32. A. Tailliez, X. Neyt, and V. Kubica. Removal of direct path interference with CLEAN Algorithm in passive SAR imaging. In URSI 2012 Benelux Forum, page 43, Brussels, BE, September 2012.
  33. Marco Talone, Raffaele Crapolicchio, Giovanna De Chiara, Xavier Neyt, Anis Elyouncha, Lidia Saavedra De Miguel, Gareth Davies, and Bojkov Bojan. Cross-calibration of ERS-1 and ERS-2 wind scatterometers; Towards a homogeneous 20-year-long wind vector monitoring of the earth. In IGARSS, pages 4606-4609, Munich, 2012.
  34. E Cristofani, V Kubica, and X Neyt. A multibeam opportunistic SAR system. In Proc. of the IEEE SP Symposium on Information Theory and Signal Processing, Brussels, BE, 2011.
  35. E Cristofani, V Kubica, and X Neyt. A multibeam opportunistic SAR system. In Proc. of the IEEE Radar conference, Kansas City, MO, May 2011.
  36. V. Kubica, E. Cristofani, and X. Neyt. Strategies for mitigating the strong direct path signal in passive bistatic SAR imaging. In Proceedings of the IEEE SP Symposium on Information Theory and Signal Processing, Brussels, BE, May 2011.
  37. V Kubica, R Hock, E Cristofani, and X Neyt. Strategies for the calibration of an array of patch antennas in passive bistatic {SAR} imaging. In Proc. of the IEEE Radar conference, Kansas City, MI, May 2011.
  38. V. Kubica, X. Neyt, and C. Barbier. A first approach to opportunistic bistatic SAR using a phased-array. In Proceedings of the URSI 2010 Benelux forum, Brussels, BE, September 2010.
  39. Anis Elyouncha, Xavier Neyt, and Marc Acheroy. Radiometric cross-calibration of spaceborne scatterometers: first results. In Proceedings of SPIE Remote Sensing of the Ocean, Sea Ice and Large Water Regions 2009, volume 74730B, Berlin, GE, September 2009. SPIE.
  40. P Decroix, X Neyt, and M Acheroy. Correction of the impact of refraction due to environmental conditions in high resolution SAR. In 2008 International Conference on Radar, pages 335-339. IEEE, September 2008.
  41. P Decroix, X Neyt, and M Acheroy. Impact of wave refraction due to environmental conditions on image processing quality in high resolution SAR. In 2008 IEEE Radar Conference, pages 1-5. IEEE, May 2008.
  42. X Neyt. Space-time adaptive processing for multistatic radars. PhD thesis, Royal Military Academy & Université de Liège, 2008.
  43. P Ries, X Neyt, F D Lapierre, and J G Verly. Fundamentals of spatial and Doppler frequencies in radar STAP. IEEE Transactions on Aerospace and Electronic Systems, 44(3):1118-1135, July 2008.
  44. X Neyt, M Acheroy, and J G Verly. Maximum-likelihood based range-dependence compensation for coherent multistatic STAP radar. In IEEE Radar Conference, pages 772-777. IEEE, April 2007.
  45. X Neyt, M Acheroy, and J G Verly. Maximum Likelihood Range Dependence Compensation for STAP. In IEEE International Conference on Acoustics, Speech and Signal Processing, pages II-913-II-916. IEEE, April 2007.
  46. X Neyt, M Acheroy, and J G Verly. Registration-based Range-dependence Compensation for Coherent Multistatic {STAP}-based Radar. In IEEE Radar Conference, Waltham, MA, April 2007.
  47. X Neyt, P Druyts, M Acheroy, and J G Verly. Structured covariance matrix estimation for the range-dependent problem in {STAP}. In Proceedings of the 4th IASTED International Conference on Antennas, Radar, and Wave Propagation, Montreal, Canada, May 2007.
  48. J Raout, X Neyt, and P Rischette. Bistatic STAP using DVB-T illuminators of opportunity. In Radar Systems, 2007 IET International Conference on, pages 1-5, 2007.
  49. P Decroix, X Neyt, and M Acheroy. Trade-Off between Motion Measurement Accuracy and Autofocus Capabilities in Airborne SAR Motion Compensation. In 2006 International Radar Symposium, pages 1-4. IEEE, May 2006.
  50. M Kubica, V Kubica, X Neyt, J Raout, S Roques, and M Acheroy. Optimum Target Detection using Illuminators of Opportunity. In 2006 IEEE Conference on Radar, pages 417-424, Verona, NY, 2006.
  51. X Neyt, M Acheroy, and J G Verly. Range-dependence Issues in Multistatic STAP-based Radar. In IEEE Workshop on Sensor Array and Multichannel Processing, pages 594-598. IEEE, 2006.
  52. X Neyt, N Manise, and M Acheroy. Analysis of the impact of {ASCAT}'s pulse compression. In Proceedings of SPIE Remote Sensing of the Ocean, Sea Ice and Large Water Regions 2006, volume 6360, Stockholm, Sweden, September 2006.
  53. X Neyt, J Raout, M Kubica, V Kubica, S Roques, M Acheroy, and J G Verly. Feasibility of STAP for Passive GSM-Based Radar. In IEEE Conference on Radar, pages 546-551. IEEE, 2006.
  54. N Manise, X Neyt, and M Acheroy. Calibration strategy for {ERS} scatterometer data reprocessing. In Proceedings of {SPIE} Remote Sensing of the Ocean, Sea Ice and Large Water Regions 2005, volume 5977, Brugge, Belgium, September 2005.
  55. X Neyt, N Manise, and M Acheroy. Enhanced neural-network based sea/ice discrimination using {ERS} scatterometer data. In Proceedings of SPIE Remote Sensing of the Ocean, Sea Ice and Large Water Regions 2005, volume 5977, Brugge, Belgium, September 2005.
  56. X Neyt, P Ries, J G Verly, and F D Lapierre. Registration-based Range-dependence Compensation method for Conformal-Array {STAP}. In Proc. Adaptive Sensor Array Processing (ASAP) Workshop, MIT Lincoln Laboratory, Lexington, MA, June 2005.
  57. R Crapolicchio, P Lecomte, and X Neyt. The Advanced Scatterometer Processing System for {ERS} data: Design, Products and Performances. In Proceedings of the Envisat Symposium, Salzburg, Austria, September 2004.
  58. F D Lapierre, X Neyt, and J G Verly. Evaluation of a Registration-Based Range-Dependence Compensation Method for a Bistatic {STAP} Radar Using Simulated, Random Snapshots. In Proc. RADAR'04, Toulouse, France, October 2004.
  59. N Manise, X Neyt, and M Acheroy. Absolute Calibration of the {ERS-2} Scatterometer in Gyro-Less Mode using transponders. In Proceedings of the Pan Ocean Remote Sensing Conference, Concepcion, Chile, November 2004.
  60. N Manise, X Neyt, and M Acheroy. Calibration of the {ERS-2} Scatterometer in Gyro-Less Mode. In Proceedings of the Envisat Symposium, Salzburg, Austria, September 2004.
  61. X Neyt, F D Lapierre, and J G Verly. Estimation of geometric radar configuration parameters for range-dependent compensation in stap in the presence of targets, jammers, and decorrelation effects. In Sensor Array and Multichannel Signal Processing Workshop, pages 662-666. IEEE, 2004.
  62. X Neyt, F D Lapierre, and J G Verly. Evaluation of a method for estimating configuration parameters in bistatic radars using directive antennas. In Radar conference, Toulouse, France, October 2004.
  63. X Neyt, F D Lapierre, and J G Verly. Principle and Evaluation of a Registration-Based Range-Dependence Compensation Method for {STAP} in Case of Arbitrary Antenna Patterns and Simulated Snapshots. In Proc. Adaptive Sensor Array Processing (ASAP) Workshop, MIT Lincoln Laboratory, Lexington, MA, March 2004.
  64. X Neyt, P Pettiaux, N Manise, and M Acheroy. Neural-network based stateless ice detection in {ERS} scatterometer data. In Proceedings of the Envisat Symposium, Salzburg, Austria, September 2004.
  65. X Neyt, P Pettiaux, N Manise, and M Acheroy. Single-pass Sea / Ice discrimination using {ERS}-2 scatterometer data. In Proceedings of the Pan Ocean Remote Sensing Conference, Concepcion, Chile, November 2004.
  66. X Neyt, P Pettiaux, and M Acheroy. Scatterometer Ground Processing Review for Gyro-Less Operations.. In Proceedings of SPIE Remote Sensing of the Ocean, Sea Ice and Large Water Regions 2002, volume 4880, Crete, Greece, September 2002.
  67. P Pettiaux, X Neyt, and M Acheroy. Validation of the {ERS}-2 Scatterometer Ground Processor Upgrade. In Proceedings of SPIE Remote Sensing of the Ocean, Sea Ice and Large Water Regions 2002, volume 4880, Crete, Greece, September 2002.