GB1388408A - Radionavigation digital bearing measuring device - Google Patents

Radionavigation digital bearing measuring device

Info

Publication number
GB1388408A
GB1388408A GB3728972A GB3728972A GB1388408A GB 1388408 A GB1388408 A GB 1388408A GB 3728972 A GB3728972 A GB 3728972A GB 3728972 A GB3728972 A GB 3728972A GB 1388408 A GB1388408 A GB 1388408A
Authority
GB
United Kingdom
Prior art keywords
pulses
degrees
bearing
pulse
phase
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB3728972A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
International Standard Electric Corp
Original Assignee
International Standard Electric Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by International Standard Electric Corp filed Critical International Standard Electric Corp
Publication of GB1388408A publication Critical patent/GB1388408A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S1/00—Beacons or beacon systems transmitting signals having a characteristic or characteristics capable of being detected by non-directional receivers and defining directions, positions, or position lines fixed relatively to the beacon transmitters; Receivers co-operating therewith
    • G01S1/02—Beacons or beacon systems transmitting signals having a characteristic or characteristics capable of being detected by non-directional receivers and defining directions, positions, or position lines fixed relatively to the beacon transmitters; Receivers co-operating therewith using radio waves
    • G01S1/08—Systems for determining direction or position line
    • G01S1/44—Rotating or oscillating beam beacons defining directions in the plane of rotation or oscillation
    • G01S1/46—Broad-beam systems producing at a receiver a substantially continuous sinusoidal envelope signal of the carrier wave of the beam, the phase angle of which is dependent upon the angle between the direction of the receiver from the beacon and a reference direction from the beacon, e.g. cardioid system
    • G01S1/48—Broad-beam systems producing at a receiver a substantially continuous sinusoidal envelope signal of the carrier wave of the beam, the phase angle of which is dependent upon the angle between the direction of the receiver from the beacon and a reference direction from the beacon, e.g. cardioid system wherein the phase angle of the direction-dependent envelope signal is a multiple of the direction angle, e.g. for "fine" bearing indication TACAN
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S1/00—Beacons or beacon systems transmitting signals having a characteristic or characteristics capable of being detected by non-directional receivers and defining directions, positions, or position lines fixed relatively to the beacon transmitters; Receivers co-operating therewith
    • G01S1/02—Beacons or beacon systems transmitting signals having a characteristic or characteristics capable of being detected by non-directional receivers and defining directions, positions, or position lines fixed relatively to the beacon transmitters; Receivers co-operating therewith using radio waves

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Radar Systems Or Details Thereof (AREA)
  • Navigation (AREA)
  • Measuring Frequencies, Analyzing Spectra (AREA)

Abstract

1388408 Radio navigation INTERNATIONAL STANDARD ELECTRIC CORP 10 Aug 1972 [13 Aug 1971] 37289/72 Relates to a digital receiver affording bearing measurement from at remote phase beacon transmitting angular reference signals together with a complex rotating signal which includes components at frequencies f and nf (e.g. 15 Hz and 135 Hz as in the TACAN system). According to the invention main PP and secondary AP reference pulses are derived, of respective repetition frequencies f, nf; main and secondary "half-reference" pulses HPP, HAP are derived from pulses PP, AP and are equi-spaced between corresponding PP and AP pulses; and the bearing determination utilizes the HPP, HAP pulses to eliminate erroneous bearing determination when the bearing is near to 0 degrees, (360 degrees/n), (2.360 degrees/n) ... 360 degrees. In the embodiment TACAN received and decoded pulses PM produce pulses MP at 135 Hz repetition rate, and a bi-stable 13 produces a digital "1" when the phase of 15 Hz pulses within Œ20 degrees of a gate centred on 0 degrees of 15 Hz phase. AND gate 14 delivers "start" pulses DP, each of which is the closest 135 Hz modulation pulse to zero of the 15 Hz sine wave. The first pulse MP of a 15 Hz cycle is synchronous with pulse DP. Pulses AP, HAP, PP, HPP are produced on respective lines 30, 301, 31, 311 by a system II which incorporates a clock pulse generator 19 operating at 270r, where r is the division ratio of a divider 20, the generator 19 being automatically controlled in frequency by a 135 Hz phase comparator 18. System III includes a "secondary" pulse counter 34, corresponding to twenty degrees of bearing and logic circuits which, together with further logic circuits in system IV control "main" counter (0 to 360 degrees) 47 and register 48. A divider 56 permits calculation of the average value of eight measurements.
GB3728972A 1971-08-13 1972-08-10 Radionavigation digital bearing measuring device Expired GB1388408A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7129724A FR2149266B1 (en) 1971-08-13 1971-08-13

Publications (1)

Publication Number Publication Date
GB1388408A true GB1388408A (en) 1975-03-26

Family

ID=9081864

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3728972A Expired GB1388408A (en) 1971-08-13 1972-08-10 Radionavigation digital bearing measuring device

Country Status (5)

Country Link
DE (1) DE2238770A1 (en)
ES (1) ES405794A1 (en)
FR (1) FR2149266B1 (en)
GB (1) GB1388408A (en)
IT (1) IT963315B (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2534382B1 (en) * 1982-10-06 1985-09-13 Trt Telecom Radio Electr TACAN TYPE SIGNAL RECEIVING DEVICE
CN113465603B (en) * 2021-05-31 2023-05-16 西南电子技术研究所（中国电子科技集团公司第十研究所） Takang navigation automatic channel selection method

Also Published As

Publication number Publication date
ES405794A1 (en) 1975-07-16
IT963315B (en) 1974-01-10
FR2149266A1 (en) 1973-03-30
DE2238770A1 (en) 1973-02-22
FR2149266B1 (en) 1975-07-11

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Legal Events

Date Code Title Description
PS Patent sealed
PLNP Patent lapsed through nonpayment of renewal fees