Passive radio wave remote sensing of multiple moving targets

Radio wave remote sensing is able to reveal target through dust, clouds, or smoke that obscure the view in the optical and infrared range.;A passive multiple-single antenna surveillance system may track moving targets. The observability of the target depends on the temperature difference between the target and background, in addition to target size, and antenna and receiver parameters.;Linear optimum spatial filters (in the minimum mean square sense) have been applied to stationary radio images. For moving targets, a time-varying matched spatial filter bank has been proposed to process a sequence of radio temperature measurements (snap-shots), for the detection of target position and velocity. Interference between the images of multiple moving targets causes errors in the position and velocity detections. The average interference power, and the probability density function (PDF) of the interference have been determined, and numerical results shown.