JPS5649965A - Removing device for interference wave - Google Patents

Removing device for interference wave

Info

Publication number
JPS5649965A
JPS5649965A JP9906679A JP9906679A JPS5649965A JP S5649965 A JPS5649965 A JP S5649965A JP 9906679 A JP9906679 A JP 9906679A JP 9906679 A JP9906679 A JP 9906679A JP S5649965 A JPS5649965 A JP S5649965A
Authority
JP
Japan
Prior art keywords
signal
distance
signals
interference wave
sent
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.)
Pending
Application number
JP9906679A
Other languages
Japanese (ja)
Inventor
Takumi Fujikawa
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.)
Furuno Electric Co Ltd
Original Assignee
Furuno Electric Co Ltd
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 Furuno Electric Co Ltd filed Critical Furuno Electric Co Ltd
Priority to JP9906679A priority Critical patent/JPS5649965A/en
Publication of JPS5649965A publication Critical patent/JPS5649965A/en
Pending 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

Abstract

PURPOSE:To enable removal of an interference wave having a long time interval by a method wherein the leading edge of a received signal is extracted as a signal of distance to the signal and then the correlation of this distance signal is taken out. CONSTITUTION:A received signal al based on the 1st transmission is sent into a pulse-forming circuit 1 and formed in such a way as pulse signals A'11 and A'12 which show a high level only in the period when signals A11 and A12 are present. The signal A'11 is sent in a distance-signal generating circuit 2 and there a distance signal D11 is generated, while a distance signal D12 of the signal A12 is generated in the similar way, and they are stored one by one in a memory circuit 61 by a clock pulse C. And, by the n-th detection, distance signals are stored sequentially in such a manner that the 1st distance signal d1 is stored in a memory circuit 6n and the n-th distance signal dn in the memory circuit 61. When the n+1st transmission is conducted, the distance signals d1-dn are sent in a logic circuit 7 based on the clock pulse C and thereby an output waveform e is obtained. Thus, an interference wave is removed completely.
JP9906679A 1979-08-01 1979-08-01 Removing device for interference wave Pending JPS5649965A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP9906679A JPS5649965A (en) 1979-08-01 1979-08-01 Removing device for interference wave

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9906679A JPS5649965A (en) 1979-08-01 1979-08-01 Removing device for interference wave

Publications (1)

Publication Number Publication Date
JPS5649965A true JPS5649965A (en) 1981-05-06

Family

ID=14237423

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9906679A Pending JPS5649965A (en) 1979-08-01 1979-08-01 Removing device for interference wave

Country Status (1)

Country Link
JP (1) JPS5649965A (en)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4922152A (en) * 1972-06-17 1974-02-27
JPS5026396A (en) * 1973-03-19 1975-03-19
JPS5122392A (en) * 1974-08-20 1976-02-23 Tokyo Shibaura Electric Co REEDAMOKUHYOHYOJI HOSHIKI

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4922152A (en) * 1972-06-17 1974-02-27
JPS5026396A (en) * 1973-03-19 1975-03-19
JPS5122392A (en) * 1974-08-20 1976-02-23 Tokyo Shibaura Electric Co REEDAMOKUHYOHYOJI HOSHIKI

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