Patent US3710332A successfully refreshed from Google Patents.
US3710332A
Expired / Lapsed
US
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Method and apparatus for finding the direction of signals
Assignee: Federal Ministry of Defence
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Filing: 1966-04-21
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Granted: 1973-01-09
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Expires: 1986-04-21
Abstract
Abstract Two directional receivers and a non-directional receiver produce voltages when receiving a main signal and interfering signal. The voltages are cross-correlated so that the resultant voltages are functions of the angle between the direction of the main signal and a reference line, and can be evaluated to determine the direction of the main signal.
Inventors
- 👤 H Tischner
- 👤 A Schief
- 👤 H Baur
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 09:21
CPC Classifications
G; G01; G01S; G01S3/00; G01S3/02; G01S3/14
Claims Analysis
Total Claims: 24
Claim 1
Independent Claim
89 words
A method for determining the direction of the signals of a signal source in the presence of interfering signals, comprising the steps of receiving the signals of the signal source and the interference signals by receivers having different directional characteristics and producing voltages; cross-correlating the voltages produced by said receivers to produce voltages which are functions of the angle between said direction and a reference line defined by said directional receivers; and evaluating said functions to find said angle and said direction of the signals of said signal source.
Claim 2
Independent Claim
89 words
A method for determining the direction of the signals of a signal source in the presence of interfering signals, comprising the steps of receiving the signals of the signal source and the interference signals by receivers having different directional characteristics and producing voltages; cross-correlating the voltages produced by said receivers to produce voltages which are functions of the angle between said direction and a reference line defined by said directional receivers; and evaluating said functions to find said angle and said direction of the signals of said signal source.
Claim 3
Dependent Claim
37 words
The method according to claim 1 including receiving said signals by directional and non-directional receivers; and cross-correlating the voltage produced by a directional receiver with the voltage produced by a nondirectional receiver to produce said composite voltages.
Claim 4
Dependent Claim
25 words
The method according to claim 2 including receiving the signals by two directional receivers set at an angle of 90* and by one non-directional receiver.
Claim 5
Dependent Claim
28 words
The method according to claim 2 including sequentially storing each of said composite voltages at time intervals; and sequentially picking up the stored composite voltages at time intervals.
Claim 6
Dependent Claim
50 words
The method according to claim 3 and including suppressing components of said composite voltages produced by said interfering signals; and wherein said evaluating includes supplying the two resultant composite voltages to the plates of an oscillograph so that said oscillograph indicates said angle between said direction and said reference line.
Claim 7
Dependent Claim
50 words
The method according to claim 3 including the steps of storing each of said composite voltages; picking up said stored voltages; and wherein said evaluating includes supplying said composite voltages to the plates of an oscillograph so that the same indicates said angle between said direction and said reference line.
Claim 8
Independent Claim
105 words
An apparatus for determining the direction of signals of a signal source in the presence of interfering signals, comprising, in combination, a plurality of receivers including two directional receivers set at an angle to each other; correlator means connected with at least one pair of said receivers for correlating voltages received from the same so as to produce composite voltages which are different functions of the angle between said direction and a reference line defIned by said directional receivers; and evaluating means connected with said correlator means for receiving said composite voltages and controlled by the same to indicate said last-mentioned angle and said direction.
Claim 9
Independent Claim
105 words
An apparatus for determining the direction of signals of a signal source in the presence of interfering signals, comprising, in combination, a plurality of receivers including two directional receivers set at an angle to each other; correlator means connected with at least one pair of said receivers for correlating voltages received from the same so as to produce composite voltages which are different functions of the angle between said direction and a reference line defIned by said directional receivers; and evaluating means connected with said correlator means for receiving said composite voltages and controlled by the same to indicate said last-mentioned angle and said direction.
Claim 10
Dependent Claim
42 words
The apparatus according to claim 7, wherein said plurality of receivers also includes a non-directional receiver; and wherein said correlator means include a pair of correlators respectively connected with one and the other of said directional receivers, and with said non-directional receiver.
Claim 11
Dependent Claim
39 words
The apparatus according to claim 7, wherein said evaluating means include storage means connected with said correlator means for receiving said correlated voltages, and indicator means controlled by said composite voltages to indicate said last-mentioned angle and said direction.
Claim 12
Dependent Claim
83 words
The apparatus according to claim 7, wherein said plurality of receivers also includes a non-directional receiver; wherein said correlator means include a pair of correlators respectively connected with one and the other of said directional receivers, and with said non-directional receiver; wherein said directional receivers are set at an angle of 90* to each other; and wherein said evaluating means include storage means for said composite voltages, and an oscillograph controlled by said composite voltages to indicate said last-mentioned angle and said direction.
Claim 13
Dependent Claim
24 words
The apparatus according to claim 10 and including means for suppressing in said oscillograph components of said composite voltages produced by said interfering signals.
Claim 14
Dependent Claim
63 words
The apparatus according to claim 7, wherein said plurality of receivers includes also a non-directional receiver; wherein said correlator means are also connected with said non-directional receiver and include multiplication and integration devices, and delay means; and including storage means for storing said composite voltages; and wherein said evaluating means are connected with said correlator means and controlled by the stored composite voltages.
Claim 15
Dependent Claim
18 words
The apparatus according to claim 12, wherein said delay means are connected with said directional and non-directional receivers.
Claim 16
Dependent Claim
14 words
The apparatus according to claim 12, wherein said delay means include a sequential register.
Claim 17
Dependent Claim
50 words
The method according to claim 1 including receiving said signals by directional and non-directional receivers; cross-correlating the voltage produced by a directional receiver with the voltage produced by a non-directional receiver to produce said composite voltages; and computing, simultaneously with cross-correlating said voltages, the cross-correlation functions for different delay times.
Claim 18
Dependent Claim
52 words
The method according to claim 1 including receiving said signals by directional and non-directional receivers; cross-correlating the voltage produced by a directional receiver with the voltage produced by a non-directional receiver to produce said composite voltages; and computing, simultaneously with cross-correlating said voltages, the cross-correlation functions for a delay time of zero.
Claim 19
Dependent Claim
13 words
The method according to claim 1 including interpolating periodical components of said voltages.
Claim 20
Dependent Claim
18 words
The method according to claim 1 including coding of the voltage values before and after correlating said voltages.
Claim 21
Dependent Claim
17 words
The method according to claim 1 including expressing voltage values as digits for the purpose of calculations.
Claim 22
Dependent Claim
16 words
The method according to claim 1 including storing said composite voltages and evaluating the stored voltages.
Claim 23
Dependent Claim
27 words
The method according to claim 1, including the step of positioning said receivers for receiving said signals without differences in the time of travel of the same.
Claim 24
Dependent Claim
30 words
An apparatus according to claim 7, wherein said receivers of said plurality of receivers are located adjacent each other for receiving said signals without differences in the time of travel.
References Cited (Backward Citations)
US3028600A
Cited
US3290684A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-01-09 | 1976-07-10 | 1977-01-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-01-09 | 1980-07-10 | 1981-01-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-01-09 | 1984-07-10 | 1985-01-09 | $7700.00 | Window Closed / Lapsed |