Communications: directive radio wave systems and devices (e.g. – Directive – Beacon or receiver
Patent
1983-08-26
1986-10-14
Tarcza, Thomas H.
Communications: directive radio wave systems and devices (e.g.,
Directive
Beacon or receiver
342367, G01S 502
Patent
active
046175709
ABSTRACT:
A swept interference canceller including a multiplexed interference cancelling receiver coupled to a scanned notch antenna and an omni-directional antenna as well as an estimator type of angular beam splitting system for accurately measuring angular bearing of a plurality of sequentially received radiating sources in a dense communication environment. A difference signal between the signals received by the two antennas is developed which is then split into a plurality of equal time samples which are then simultaneously fed into two synchronous multi-stage shift registers. The output stages of one of the shift registers operate so that they all have the same output states. The output stages of the other shift register, however, operate so that the first half have the same output state as the first shift register while the second half are of the opposite output state. The outputs from the two shift registers are summed and fed to a logic gate which operates to generate an output signal following the occurrence of the middle time sample which is a time corresponding to the position of the boresight axis of the signal received from a radiating source.
REFERENCES:
patent: 3290684 (1966-12-01), Renn et al.
patent: 3710384 (1973-01-01), Ashcraft
patent: 4275397 (1981-06-01), Gutleber
Hellner Mark
Tarcza Thomas H.
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