GB2158669A - Distance measuring receiver system and method - Google Patents

Distance measuring receiver system and method

Info

Publication number
GB2158669A
GB2158669A GB08515420A GB8515420A GB2158669A GB 2158669 A GB2158669 A GB 2158669A GB 08515420 A GB08515420 A GB 08515420A GB 8515420 A GB8515420 A GB 8515420A GB 2158669 A GB2158669 A GB 2158669A
Authority
GB
United Kingdom
Prior art keywords
signal
channel
signals
subsystem
pair
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.)
Granted
Application number
GB08515420A
Other versions
GB8515420D0 (en
GB2158669B (en
Inventor
Lewis C Spence
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of GB8515420D0 publication Critical patent/GB8515420D0/en
Publication of GB2158669A publication Critical patent/GB2158669A/en
Application granted granted Critical
Publication of GB2158669B publication Critical patent/GB2158669B/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
    • G01S1/20—Systems for determining direction or position line using a comparison of transit time of synchronised signals transmitted from non-directional antennas or antenna systems spaced apart, i.e. path-difference systems
    • G01S1/30—Systems for determining direction or position line using a comparison of transit time of synchronised signals transmitted from non-directional antennas or antenna systems spaced apart, i.e. path-difference systems the synchronised signals being continuous waves or intermittent trains of continuous waves, the intermittency not being for the purpose of determining direction or position line and the transit times being compared by measuring the phase difference
    • G01S1/306—Analogous systems in which frequency-related signals (harmonics) are compared in phase, e.g. DECCA systems
    • 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
    • G01S1/20—Systems for determining direction or position line using a comparison of transit time of synchronised signals transmitted from non-directional antennas or antenna systems spaced apart, i.e. path-difference systems
    • G01S1/30—Systems for determining direction or position line using a comparison of transit time of synchronised signals transmitted from non-directional antennas or antenna systems spaced apart, i.e. path-difference systems the synchronised signals being continuous waves or intermittent trains of continuous waves, the intermittency not being for the purpose of determining direction or position line and the transit times being compared by measuring the phase difference
    • 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
    • G01S11/00—Systems for determining distance or velocity not using reflection or reradiation
    • G01S11/02—Systems for determining distance or velocity not using reflection or reradiation using radio waves
    • G01S11/08—Systems for determining distance or velocity not using reflection or reradiation using radio waves using synchronised clocks

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Position Fixing By Use Of Radio Waves (AREA)
  • Radar Systems Or Details Thereof (AREA)

Abstract

A distance measuring receiver system and method (101) for determining the distance of a receiving station from a transmitting station, which provides the distance information by the reception and processing of a pair of signals (preferably continuous wave carrier) transmitted by the transmitting station. The present invention receives the pair of signals (upper signal (F1) and lower signal (F2)) using an antenna (102) connected to a front end subsystem (104) for amplifying and frequency translating to baseband the received pair of signals (F1, F2). The pairs of signals (F1, F2) at baseband are supplied to the upper channel (401) and to the lower channel (402) of a filter subsystem (106). The upper channel (401) exctracts the upper signal and the lower channel (402) extracts the lower signal. The filter subsystem (106) supplies the upper signal to the first channel (501) and the lower signal to the second channel (502) of a lane expansion subsystem (108), which produces a plurality of difference frequency signals (113, 115, 117, 119) (of preselected multiples) in accordance with the upper and lower signals. An oscillator subsystem (110) generates an oscillator signal (210) (of preselected phase and frequency) as a function of a clock signal (123) generated by a precise source (125) (such as an atomic clock). A reference subsystem (112) in accordance with the oscillator signal (121) supplies a plurality of reference signals (127, 129, 131, 133) (having frequencies equal to the frequencies corresponding to difference frequency signals). By comparing the phase of corresponding difference frequency and reference signals, phase comparator subsystem (114) produces a plurality of measurement lanes of different lengths, which allow the present invention to zero in on the position of the receiving station. Substantial elimination of phase error to each signal caused by signal processing is achieved by the present invention. An upper channel automatic gain stage in accordance with the level of the signal pair controls the Vcc voltage provided to the amplifying stages of the front end subsystem and to the active devices of the upper channel, while a lower channel AGC controls the Vcc voltage provided to the active devices of the lower channel. This results in the power output of the amplifying stages and the devices being maintained at a preselected value irrespective of the level of the signal pair. In addition, the varactor diodes cancel out minute capacitance changes exhibited by the crystal tuned circuits in the upper channel and in the lower channel due to the change in Vcc, the output signal power and the movement of the operating point of the active devices.
GB08515420A 1983-10-20 1984-10-19 Distance measuring receiver system and method Expired GB2158669B (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US54360283A 1983-10-20 1983-10-20
PCT/US1984/001693 WO1985001798A1 (en) 1983-10-20 1984-10-19 Distance measuring receiver system and method

Publications (3)

Publication Number Publication Date
GB8515420D0 GB8515420D0 (en) 1985-07-17
GB2158669A true GB2158669A (en) 1985-11-13
GB2158669B GB2158669B (en) 1987-05-20

Family

ID=24168728

Family Applications (1)

Application Number Title Priority Date Filing Date
GB08515420A Expired GB2158669B (en) 1983-10-20 1984-10-19 Distance measuring receiver system and method

Country Status (2)

Country Link
GB (1) GB2158669B (en)
WO (1) WO1985001798A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2368738A (en) * 2000-07-03 2002-05-08 Robert James Ely System for space vehicle range-rate and integrated range-rate measurements
US7515093B2 (en) * 2005-03-24 2009-04-07 Tdk Corporation Active antenna radar system

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3797015A (en) * 1969-06-16 1974-03-12 A Elwood Method of and system for locating a position
US3967277A (en) * 1968-03-14 1976-06-29 Teledyne, Inc. Radio navigation system

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3967277A (en) * 1968-03-14 1976-06-29 Teledyne, Inc. Radio navigation system
US3797015A (en) * 1969-06-16 1974-03-12 A Elwood Method of and system for locating a position

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2368738A (en) * 2000-07-03 2002-05-08 Robert James Ely System for space vehicle range-rate and integrated range-rate measurements
US7515093B2 (en) * 2005-03-24 2009-04-07 Tdk Corporation Active antenna radar system

Also Published As

Publication number Publication date
GB8515420D0 (en) 1985-07-17
GB2158669B (en) 1987-05-20
WO1985001798A1 (en) 1985-04-25

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Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee