Tomographic methods of controlling reflections from local objects

Abstract

The use of prior information about the shape of the radiation pattern (RP) makes it possible to determine the spatial distribution of the effective surfaces of repeated reflection of local objects invariant to a change in the parameters of the RP. The use of a novelty filter (instead of subtraction) for compensating reflections from local objects eliminates the effect of the radar receiving-amplifying channel on compensation of the parameters. The simplest method of compensating reflections from local objects is storing video signals for each orientation of the RP in a mapping mode and subtracting this signal in the on-line taiget detection and tracking mode. Such an approach would be sufficiently effective if the shape of the RP, parameters of the receiving and transmitting channels of the radar, and also the media of propagation in the mapping and on-line modes remained unchanged. Unfortunately, it is not possible to achieve this, and not only for technological reasons. Modem radars, e.g., the "Patriot,” use a set of phased arrays for forming the RP, making it possible by adaptive methods to change the shape of the RP for controlling noise. This means that the shapes of the RP in the mapping and on-line modes as well as the video signals reflected from local objects will be different and their subtraction will not produce the expected compensation results…