Beam forming system

Details Beam forming system Beam forming system

G - Physics

01

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349/25, 343/48,

G01S 3/82 (2006.01) G01S 3/14 (2006.01) G01S 3/46 (2006.01) G01S 3/808 (2006.01) G01S 7/295 (2006.01) G10K 11/34 (2006.01)

Patent

CA 1101981

BEAM FORMING SYSTEM Abstract of the Disclosure A system for forming a beam of radiant energy which is incident upon or radiated from an array of radiating elements such as sonar transducers. As a wavefront progresses across the array, samples of signals received by individual ones of the transducers are selected in accordance with specific beams to be formed, the selected samples being summed together through a sequence of partial summations until a complete summation of a sample of a beam is obtained. The sequence of partial summations is initiated successively for each output sampling interval. For a long array, wherein the transit time of a wavefront across the array is longer than the intersample interval, a plurality of the sequences are generated concur- rently. All partial sums for all beam samples are generated periodically at the output sampling rate and are stored in a memory. The address of the memory is permuted at a rate of one memory section per output sample interval whereby a presently calculated partial sum is combined with the partial sum of an earlier sequence.`

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