Communications: directive radio wave systems and devices (e.g. – Directive – Beacon or receiver
Patent
1991-11-15
1993-10-19
Hellner, Mark
Communications: directive radio wave systems and devices (e.g.,
Directive
Beacon or receiver
342437, 342432, G01S 504
Patent
active
052550001
ABSTRACT:
An apparatus and method for measuring the angles of arrival of a pair of transmission signals relative to a fixed antenna pair simultaneously receiving the transmission signals based upon the phase difference between antennas for each signal and the frequencies thereof includes components for separately squaring the signals received by each antenna, filtering each squared signal for separating a high frequency band and a middle frequency band, first phase correlating high frequency band signals filtered from each squared signal for producing a sum signal of the phase differences between the antennas for received transmission signals, second phase correlating middle frequency band signals filtered from each squared signal for producing a difference signal for the phase differences of the transmission signals received by the antenna pair, determining the phase differences of the transmission signals received by the antenna pair from the sum and difference signals therefor, providing delayed middle frequency band signals filtered from a squared signal from one of the antennas, third phase correlating the delayed middle frequency band signals from the one of the antennas with the middle frequency band signals of the other of the antennas for producing a correspondence signal related to the correspondence between the frequencies and the determined phase differences, and computing the angles of arrival of the pair of transmission signals using the determined phase differences, the frequencies and the correspondence signal.
REFERENCES:
patent: 4633516 (1986-12-01), Tsui
patent: 4675684 (1987-06-01), Spence
patent: 4975710 (1990-12-01), Baghdady
Gomes David W.
Hellner Mark
LandOfFree
Transmission signal direction finding apparatus and method does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Transmission signal direction finding apparatus and method, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Transmission signal direction finding apparatus and method will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1355138