An Optical Range-Gated Filtering Technique for Mti Radar

Moving targets submerged in clutter can be more readily detected by range-gated filtering techniques. Range-gated filtering is a two-dimensional process in which target Doppler frequency and range are desired output quantities. Optical data processing techniques are inherently multidimentsional. An experimental system using a He-Ne laser source and film transparencies representing radar echoes gave output patterns in agreement with theoretical predictions. Major advantages of an optical filter are simplicity and relatively small size.