JPS54104722A - Delay time measuring unit for fm multi-path interference wave - Google Patents

Delay time measuring unit for fm multi-path interference wave

Info

Publication number
JPS54104722A
JPS54104722A JP1120778A JP1120778A JPS54104722A JP S54104722 A JPS54104722 A JP S54104722A JP 1120778 A JP1120778 A JP 1120778A JP 1120778 A JP1120778 A JP 1120778A JP S54104722 A JPS54104722 A JP S54104722A
Authority
JP
Japan
Prior art keywords
circuit
detected
delay time
amplitude
interference wave
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
JP1120778A
Other languages
Japanese (ja)
Inventor
Kenichi Torii
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.)
Toshiba Corp
Original Assignee
Toshiba Corp
Tokyo Shibaura 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 Toshiba Corp, Tokyo Shibaura Electric Co Ltd filed Critical Toshiba Corp
Priority to JP1120778A priority Critical patent/JPS54104722A/en
Publication of JPS54104722A publication Critical patent/JPS54104722A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/06—Receivers
    • H04B1/10—Means associated with receiver for limiting or suppressing noise or interference

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Noise Elimination (AREA)

Abstract

PURPOSE:To enable to perform the rejection of FM-multi-path distortion in excellent manner, by calculating the delay time of FM multi-path interference wave from te calculated value when the amplitude modulation component is detected as almost zero with the AM detection circuit. CONSTITUTION:The low band conversion signal obtained by adding the FM input signal to the mixer 4 is delayed 6, the amplitude of the output is adjusted with the amplitude adjusting circuit 7, this signal adjusted is synthesized with the output of mixer with the synthesizer 8 and the interruption component is rejected, and the amplitude modulation component is detected with the AM detection circuit 9. The oscillator 38 counts 40 the clock signal when the amplitude modulation component is detected, and the delay amount of the circuit 6 and the set amplitude value of the circuit 7 are set corresponding to the given value. Further, the circuit 9 calculates the delay time of the FM multi-path interference wave form the count value when the amplitude modulation component is detected as almost zero. Thus, the rejection of th FM multi-path distortion can be made in excellent manner.
JP1120778A 1978-02-03 1978-02-03 Delay time measuring unit for fm multi-path interference wave Pending JPS54104722A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1120778A JPS54104722A (en) 1978-02-03 1978-02-03 Delay time measuring unit for fm multi-path interference wave

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1120778A JPS54104722A (en) 1978-02-03 1978-02-03 Delay time measuring unit for fm multi-path interference wave

Publications (1)

Publication Number Publication Date
JPS54104722A true JPS54104722A (en) 1979-08-17

Family

ID=11771554

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1120778A Pending JPS54104722A (en) 1978-02-03 1978-02-03 Delay time measuring unit for fm multi-path interference wave

Country Status (1)

Country Link
JP (1) JPS54104722A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100643938B1 (en) * 2000-11-23 2006-11-10 넥스원퓨처 주식회사 The measurement apparatus of carrier frequency of AM modulating signal

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100643938B1 (en) * 2000-11-23 2006-11-10 넥스원퓨처 주식회사 The measurement apparatus of carrier frequency of AM modulating signal

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