Space-Time Adaptive Processing for AMTI and GMTI Radar
Dr. James Ward - MIT Lincoln Labaratory, Dr. Stephen Kogon - MIT Lincoln Laboratory
Mon, 26 April 2004, 6:00 PM - 10:00 PM
Space-Time-Adaptive Processing (STAP) is becoming an integral part of modern airborne and space-based radars for performing Airborne Moving Target Indicator (AMTI) and Ground Moving Target Indicator (GMTI) functions. STAP is an application of optimum and adaptive array processing algorithms to the radar problem of target detection in ground clutter and interference with pulse-Doppler waveforms and multi-channel antennas and receivers. Coupled space-time processing is required to optimally mitigate the Doppler spreading of ground clutter induced by radar platform motion. This tutorial will begin with the fundamentals of adaptive beamforming and radar pulse-Doppler processing, move through principles and application of STAP, and conclude with a brief overview of some advanced current research topics. Optimum STAP and a taxonomy of practical STAP architectures and algorithms will be described in depth. Key aspects of a practical STAP algorithm include the methods for estimating the background interference, proper subspace selection, and the technique for computing STAP filter weights. Algorithms for providing rapid convergence, robustness to clutter inhomogeneities, robustness to steering vector calibration errors, and reduced computational complexity will be described. Displaced Phase Center Antenna (DPCA) processing will be presented as a nonadaptive space-time processor that gives insight into STAP performance. The effect of STAP on subsequent CFAR detection and target parameter estimation algorithms will be discussed briefly. Simulation and experimental data will be used to illustrate STAP concepts and algorithmic issues.
Dr. James Ward - MIT Lincoln Labaratory
Dr. James Ward is Leader of the Advanced Sensor Techniques Group at MIT Lincoln Laboratory. He received his PhD degree in Electrical Engineering from the Ohio State University in 1990. His primary research area is signal processing for advanced radar, sonar, and communications systems, including adaptive array processing and space-time adaptive processing (STAP). He has published several technical articles and a well-known technical report on STAP for radar, has given tutorials at international conferences and other forums, and helps to conduct internal Lincoln Laboratory short courses on radar systems. In 2001 he was the recipient of the MIT Lincoln Laboratory Technical Excellence Award, and in 2003 received the IEEE AESS Fred Nathanson Young Radar Engineer Award. Dr. Ward is a Senior Member of the IEEE.
Dr. Stephen Kogon - MIT Lincoln Laboratory
Dr. Stephen Kogon is a member of the technical staff at MIT Lincoln Laboratory in the Advanced Sensor Techniques group where he has been since 1997. He received his Ph.D. in Electrical Engineering from the Georgia Institute of Technology in 1996. His primary research interest is in adaptive signal processing for advanced airborne and space-based radar and passive sonar systems, specifically in the area of array processing algorithm development for these applications. Dr. Kogon has published several technical articles in these areas as well as written two book chapters on space-time adaptive processing (STAP) in a soon to be published book Applications of Space-Time Adaptive Processing (Richard Klemm, editor). He is also a co-author (with Manolakis and Ingle) of the textbook Statistical and Adaptive Signal Processing published by McGraw-Hill in 2000.