Accession Number : ADD007895

Title :   Digital Beam Former.

Descriptive Note : Patent,

Corporate Author : DEPARTMENT OF THE ARMY WASHINGTON DC

Personal Author(s) : Johnson,Richard N

Report Date : 05 Aug 1980

Pagination or Media Count : 17

Abstract : This invention relates to a method and apparatus for forming a set of simultaneous multiple antenna beams. The digital technique utilizes a Fermat Number Transform (FNT) processor which takes the transform of number sequences consisting of the output signals from the elements of a preferably circular, equiangularly spaced antenna array, then forms the complex linear vector product of the transformed signals and a stored beam-forming function, and finally processes the complex linear vector product through an inverse FNT network to generate a set of simultaneous multiple antenna beams. The advantages of utilizing the FNT include reduced hardware requirements, greater processing speed due to a reduction in multiplications required to be performed, and sharper output beams due to the absence in the FNT or roundoff errors.

Descriptors :   *Patents, *Beam forming, *Digital systems, *Antenna radiation patterns, Dual mode, Beams(Radiation), Sequences, Processing, Antennas, Requirements, Velocity, Inventions, Reduction, Signals, Numbers, Output

Subject Categories : Radiofrequency Wave Propagation

Distribution Statement : APPROVED FOR PUBLIC RELEASE