Accurate location sonar and radar

Details Accurate location sonar and radar Accurate location sonar and radar

1985-05-31

1987-08-11

Tubbesing, T. H.

Communications: directive radio wave systems and devices (e.g.,

With particular circuit

Digital processing

367 87, G01S 744

Patent

active

046865322

ABSTRACT:
A sonar or radar permits primary distributed scatterers that are close to the sonar or radar relative to the array dimension to be rapidly and accurately located and pertinent characteristics to be estimated, such as Doppler and complex scattering strength. The region viewed is partitioned in annuli instead of in angular pie shaped slices as is normally the case for conventional sonar. This avoids the difficulty with conventional sonar or radar of distinguishing whether a scatterer is in a side lobe or the main beam an dis preferable to conventional sonars or radars in the important case of approaching multiple scatterers, e.g. robotic vehicle sensors or torpedo terminal homing on a target, because near regions may be examined in all directions prior to further regions. Computational speed is achieved by utilizing precomputation and leaving only part of the computation to be performed in real time.

REFERENCES:
patent: 3885224 (1975-05-01), Klahr
patent: 3978480 (1976-08-01), Tsuruta et al.
patent: 4321601 (1982-03-01), Richman

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