Dr. Daniel Thomas
Abstract: Modern radars are faced with many challenges that may require processing techniques beyond simple filters, pulse compressors, Doppler processing and constant-false-alarm-rate (CFAR) detection. A wide variety of advanced processing techniques have been developed over the years that can improve performance, reduce losses, and produce useful output products to aid the radar developer. This tutorial presents the fundamentals for a number of these techniques (both advantages and limitations) along with some of their applications. Spatially Variant Apodization (SVA) provides optimum tapering of an aperture, providing low sidelobes with very little loss. Range Keystone Processing compensates for range walk in slow time. Acceleration Processing allows for direct estimate acceleration within a coherent processing interval. Efficient Multi-Channel Digital Processing provides a processing-efficient method for combining digital downconversion, pulse compression and channel matching for pairs of receive channels. Along-Track Interferometry allows detection of ground moving targets against a stationary background in synthetic aperture radar (SAR) imagery by forming and processing images over the same spatial aperture from multiple phase centers. Hough Transforms are used to identify/extract features such as line segments in an image and can be used, for example, to identify target tracks in noise.