Communications: directive radio wave systems and devices (e.g. – Directive – Utilizing correlation techniques
Patent
1989-02-07
1989-07-18
Tarcza, Thomas H.
Communications: directive radio wave systems and devices (e.g.,
Directive
Utilizing correlation techniques
342384, G01S 316
Patent
active
048497649
ABSTRACT:
A beam is directed to an interfering source to obtain the best estimate of this signal. The beamformer output is fed into an inverse beamformer in such a way that the total delay experienced by a signal from any element of the array is the same as that of other elements in the array. Each output from the inverse beamformer is a spatially filtered replica of the signal received by the corresponding array element except for a fixed time delay constant for each element. The same delay is imparted in a second channel to each of the array outputs which are substituted from the corresponding inverse beamformer outputs. If the amplitude and delay of each signal to the subtracter are equal, the outputs from each of the subtracters will no longer contain signal components from the direction of the interfering signal.
REFERENCES:
patent: 3068474 (1962-12-01), Higgins et al.
patent: 4017867 (1977-04-01), Claus
patent: 4274148 (1981-06-01), Hullenaar
patent: 4516126 (1985-05-01), Masak et al.
patent: 4697188 (1987-09-01), Lin
Cain David
Raytheon Company
Santa Martin M.
Sharkansky Richard M.
Tarcza Thomas H.
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