Computer simulation study of MTI using FFT and nonlinear processors

Apparatus and methods for moving target indicator simulation

Abstract: A moving target simulator system for pulse Doppler radar includes a processor for processing received radar signal and transforming the signal into patterned pulses before subjecting the patterned pulses to an 180 degree phase-shift by a phase-shifter. The system also includes a reference signal provided by a corner reflector located in proximity of the simulator. The reference signal and a phase-shifted signal from the simulator are processed by the radar equipped with a phase corrector circuitry to correct a phase drift problem associated with the use of a small antenna with the simulator.

Modeling of clutter for coherent pulsed radar (Corresp.)

Abstract: This article is concerned with the video signal obtained when a coherent pulsed radar scans through moving scintillating scatrefers (clutter). In particular, a formula is obtained for the autocorrelation function of the clutter, assuming Gaussian distributions of doppler and scintillation for the scatterers. Results are included on a computer model developed to simulate clutter with predefined characteristics.

Radar performance studies of adaptive lattice clutter-suppression filters

Abstract: The paper describes the use of a prediction-error filter (realised in the form of an adaptive lattice filter) for enhancing the detection of a moving target (for example aircraft and migrating flocks of birds) in the presence of clutter. This process is well suited for use in a surveillance radar environment (for example air-traffic control). The clutter may arise owing to reflections from ground and weather disturbances. Experimental results are included in the paper, comparing the performance of the processor with that of a conventional moving-target indication (MTI) filter.