Large-Area Remote Sensing in High-Altitude High-Speed Platform Using MIMO SAR

Large-area mapping is of great valuable in microwave remote sensing, but it is a contradiction between swath width and azimuth resolution due to the minimum antenna area constraint. In this paper, we consider a specific wide-area mapping technique with high-altitude high-speed platform, where range ambiguity suppression is a technical challenge. To resolve this problem, we present a multiple-input multiple-output (MIMO) synthetic aperture radar (SAR) with multiple antennas placed in the cross-track direction. The increased degrees-of-freedom (DOFs) provide a potential to resolve possible range and/or azimuth ambiguities. After formalizing the system scheme and signal model, an iterative matched filtering algorithm is presented, which can efficiently suppress the cross-correlation interferences in the multichannel data separation. Furthermore, a range-Doppler based image formation algorithm is derived. The MIMO SAR system performance is evaluated by the range-ambiguity-to-signal ratio (RASR) performance. Numerical simulation results validate the effectiveness of the proposed MIMO SAR in high-altitude high-speed platform SAR for large-area remote sensing.

[1]  Giulio Romeo,et al.  Heliplat®: high altitude very-long endurance solar powered UAV for telecommunication and Earth observation applications , 2004, The Aeronautical Journal (1968).

[2]  Edward B. Tomme,et al.  The Paradigm Shift to Effects-Based Space Near-Space as a Combat Space Effects Enabler , 2012 .

[3]  Bill Moran,et al.  Location and Imaging of Moving Targets using Nonuniform Linear Antenna Array SAR , 2007 .

[4]  K. Tomiyasu.  Conceptual Performance of a Satellite Borne, Wide Swath Synthetic Aperture Radar , 1981, IEEE Transactions on Geoscience and Remote Sensing.

[5]  J Holis,et al.  Effect of Antenna Power Roll-Off on the Performance of 3G Cellular Systems from High Altitude Platforms , 2010, IEEE Transactions on Aerospace and Electronic Systems.

[6]  J. Mittermayer,et al.  Analysis of range ambiguity suppression in SAR by up and down chirp modulation for point and distributed targets , 2003, IGARSS 2003. 2003 IEEE International Geoscience and Remote Sensing Symposium. Proceedings (IEEE Cat. No.03CH37477).

[7]  Alexander G. Yarovoy,et al.  A Sparse Aperture MIMO-SAR-Based UWB Imaging System for Concealed Weapon Detection , 2011, IEEE Transactions on Geoscience and Remote Sensing.

[8]  Mengdao Xing,et al.  Adaptive two-step calibration for high resolution and wide-swath SAR imaging , 2010 .

[9]  M. Suess,et al.  A novel high resolution, wide swath SAR system , 2001, IGARSS 2001. Scanning the Present and Resolving the Future. Proceedings. IEEE 2001 International Geoscience and Remote Sensing Symposium (Cat. No.01CH37217).

[10]  Wenqin Wang.  Applications of MIMO Technique for Aerospace Remote Sensing , 2007, 2007 IEEE Aerospace Conference.

[11]  John C. Curlander,et al.  Synthetic Aperture Radar: Systems and Signal Processing , 1991 .

[12]  Wen-Qin Wang,et al.  A Flexible Phased-MIMO Array Antenna with Transmit Beamforming , 2012 .

[13]  Dario Tarchi,et al.  MIMO Radar and Ground-Based SAR Imaging Systems: Equivalent Approaches for Remote Sensing , 2013, IEEE Transactions on Geoscience and Remote Sensing.

[14]  Gerhard Krieger,et al.  Azimuth Phase Center Adaptation on Transmit for High-Resolution Wide-Swath SAR Imaging , 2009, IEEE Geoscience and Remote Sensing Letters.

[15]  Zheng Bao,et al.  Generation of wide-swath and high-resolution SAR images from multichannel small spaceborne SAR systems , 2005, IEEE Geosci. Remote. Sens. Lett..

[16]  A. Jain,et al.  Multibeam synthetic aperture radar for global oceanography , 1979 .

[17]  Gerhard Krieger,et al.  Ambiguity Suppression by Azimuth Phase Coding in Multichannel SAR Systems , 2011, IEEE Transactions on Geoscience and Remote Sensing.

[18]  Werner Wiesbeck,et al.  Investigation of a New Multifunctional High Performance SAR System Concept Exploiting MIMO Technology , 2008, IGARSS 2008 - 2008 IEEE International Geoscience and Remote Sensing Symposium.

[19]  Gerhard Krieger,et al.  SAR signal reconstruction from non-uniform displaced phase centre sampling in the presence of perturbations , 2005, Proceedings. 2005 IEEE International Geoscience and Remote Sensing Symposium, 2005. IGARSS '05..

[20]  Ed Mel Tomme,et al.  Balloons in Today's Military? an Introduction to the Near-Space Concept , 2005 .

[21]  Pierfrancesco Lombardo,et al.  Exploiting MIMO SAR Potentialities With Efficient Cross-Track Constellation Configurations for Improved Range Resolution , 2011, IEEE Transactions on Geoscience and Remote Sensing.

[22]  W. Wiesbeck,et al.  Investigation of MIMO SAR for interferometry , 2007, 2007 European Radar Conference.

[23]  Minhui Zhu,et al.  The angle error estimate method in the wide swath SAR basing on multi-receiver , 2006 .

[24]  Wen-Qin Wang,et al.  Near-Space Vehicle-Borne SAR With Reflector Antenna for High-Resolution and Wide-Swath Remote Sensing , 2012, IEEE Transactions on Geoscience and Remote Sensing.

[25]  Bill Correll.  Efficient Spotlight SAR MIMO Linear Collection Configurations , 2010, IEEE Journal of Selected Topics in Signal Processing.

[26]  Pierfrancesco Lombardo,et al.  Monitoring and surveillance potentialities obtained by splitting the antenna of the COSMO-SkyMed SAR into multiple sub-apertures , 2006 .

[27]  G. Krieger,et al.  Digital beamforming and MIMO SAR: Review and new concepts , 2012 .

[28]  Wen-Qin Wang,et al.  Near-space vehicles: Supply a gap between satellites and airplanes for remote sensing , 2011, IEEE Aerospace and Electronic Systems Magazine.

[29]  Wen-Qin Wang.  OFDM waveform diversity design for MIMO SAR imaging , 2012, 2012 IEEE International Geoscience and Remote Sensing Symposium.

[30]  Gerhard Krieger,et al.  Unambiguous SAR signal reconstruction from nonuniform displaced phase center sampling , 2004, IEEE Geoscience and Remote Sensing Letters.

[31]  Zheng Bao,et al.  Performance improvement for constellation SAR using signal processing techniques , 2006 .

[32]  Buford R. Jean,et al.  A Multiple Beam Synthetic Aperture Radar Design Concept for Geoscience Applications , 1983, IEEE Transactions on Geoscience and Remote Sensing.

[33]  Gerhard Krieger,et al.  Digital Beamforming on Receive: Techniques and Optimization Strategies for High-Resolution Wide-Swath SAR Imaging , 2009, IEEE Transactions on Aerospace and Electronic Systems.

[34]  M. Luglio,et al.  A TCP Driven CAC Scheme: Efficient Resource Utilization in a Leaky HAP-Satellite Integrated Scenario , 2009, IEEE Transactions on Aerospace and Electronic Systems.

[35]  I. Longstaff,et al.  Wide-swath space-borne SAR using a quad-element array , 1999 .

[36]  M. Picciolo,et al.  Adaptive LFM waveform diversity , 2008, 2008 IEEE Radar Conference.

[37]  Gerhard Krieger,et al.  Errata: Digital Beamforming on Receive: Techniques and Optimization Strategies for High-Resolution Wide-Swath SAR Imaging , 2009 .

[38]  Fred Daum,et al.  MIMO radar: Snake oil or good idea? , 2008, 2009 International Waveform Diversity and Design Conference.

[39]  Gerhard Krieger,et al.  A high resolution wide swath SAR , 2006 .

[40]  Jens Klare.  Digital Beamforming for a 3D MIMO SAR - Improvements through Frequency and Waveform Diversity , 2008, IGARSS 2008 - 2008 IEEE International Geoscience and Remote Sensing Symposium.

[41]  Markos P. Anastasopoulos,et al.  High altitude platform networks: A feedback suppression algorithm for reliable multicast/broadcast services , 2009, IEEE Transactions on Wireless Communications.

[42]  Wei Xu,et al.  Multichannel SAR With Reflector Antenna for High-Resolution Wide-Swath Imaging , 2010, IEEE Antennas and Wireless Propagation Letters.

[43]  M. A. Brown,et al.  Wide-swath SAR , 1992 .

[44]  Wen-Qin Wang.  Space–Time Coding MIMO-OFDM SAR for High-Resolution Imaging , 2011, IEEE Transactions on Geoscience and Remote Sensing.

[45]  Wen-Qin Wang,et al.  Mitigating Range Ambiguities in High-PRF SAR With OFDM Waveform Diversity , 2013, IEEE Geoscience and Remote Sensing Letters.

[46]  Wen-Qin Wang,et al.  Near-Space Wide-Swath Radar Imaging With Multiaperture Antenna , 2009, IEEE Antennas and Wireless Propagation Letters.

[47]  Wen-Qin Wang.  Near-Space Remote Sensing - Potential and Challenges , 2011, Springer Briefs in Electrical and Computer Engineering.