GB818349A - Improvements in or relating to pulse receivers - Google Patents

Improvements in or relating to pulse receivers

Info

Publication number
GB818349A
GB818349A GB8097/57A GB809757A GB818349A GB 818349 A GB818349 A GB 818349A GB 8097/57 A GB8097/57 A GB 8097/57A GB 809757 A GB809757 A GB 809757A GB 818349 A GB818349 A GB 818349A
Authority
GB
United Kingdom
Prior art keywords
channels
combined
pulses
outputs
fed
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
GB8097/57A
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.)
Thales SA
Original Assignee
CSF Compagnie Generale de Telegraphie sans Fil SA
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 CSF Compagnie Generale de Telegraphie sans Fil SA filed Critical CSF Compagnie Generale de Telegraphie sans Fil SA
Publication of GB818349A publication Critical patent/GB818349A/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
    • G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
    • G01S7/02—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S13/00
    • G01S7/28—Details of pulse systems
    • G01S7/285—Receivers
    • G01S7/292—Extracting wanted echo-signals
    • G01S7/2921—Extracting wanted echo-signals based on data belonging to one radar period
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03D—DEMODULATION OR TRANSFERENCE OF MODULATION FROM ONE CARRIER TO ANOTHER
    • H03D1/00—Demodulation of amplitude-modulated oscillations
    • H03D1/02—Details
    • H03D1/04—Modifications of demodulators to reduce interference by undesired signals

Abstract

818,349. Radio receiving systems; pulse radar. COMPAGNIE GENERALE DE TELEGRAPHIE SANS FIL. March 12, 1957 [March 28, 1956], No. 8097/57. Classes 40 (5) and 40 (7). In an arrangement for reducing the effects of interference in a receiver for pulses of highfrequency waves, e.g. a radar receiver, the receiver comprises two channels with their inputs fed with received pulses, one of the channels comprising a phase detector to which reference oscillations of the frequency of the waves in the input pulses are also fed, and the other channel containing an amplitude detector, the outputs of the two channels being combined to supply signals for utilization. As shown, the output of the intermediate frequency amplifier 6 is fed to two channels, one channel including a limiter 7, phase detector 8 with its reference oscillator 9 supplying a local oscillation of the same frequency as that of the incoming pulses and in a fixed phase relation with the desired signal, and a full-wave rectifier 10, and the other channel comprising an amplitude detector 11. The outputs of the two channels are combined at 12 and the overall gains in the two channels are such that the noise levels are substantially equal at the input to the combining circuit 12. It is stated that an improvement in the signal/noise ratio by a factor of #2 is obtained, the desired signals in the two channels, which are coherent, being combined additively, and the random noise outputs from the two channels being combined in quadrature.
GB8097/57A 1956-03-28 1957-03-12 Improvements in or relating to pulse receivers Expired GB818349A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR1147237T 1956-03-28

Publications (1)

Publication Number Publication Date
GB818349A true GB818349A (en) 1959-08-12

Family

ID=9645771

Family Applications (1)

Application Number Title Priority Date Filing Date
GB8097/57A Expired GB818349A (en) 1956-03-28 1957-03-12 Improvements in or relating to pulse receivers

Country Status (2)

Country Link
FR (1) FR1147237A (en)
GB (1) GB818349A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3317670A (en) * 1963-05-28 1967-05-02 Bell Telephone Labor Inc Receiver for detecting supervisory tones superimposed on fsk binary data signals
FR2625326A1 (en) * 1984-05-18 1989-06-30 Thomson Csf Processor of noisy coherent signals for Doppler radar systems

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3317670A (en) * 1963-05-28 1967-05-02 Bell Telephone Labor Inc Receiver for detecting supervisory tones superimposed on fsk binary data signals
FR2625326A1 (en) * 1984-05-18 1989-06-30 Thomson Csf Processor of noisy coherent signals for Doppler radar systems

Also Published As

Publication number Publication date
FR1147237A (en) 1957-11-20

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