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JPS56168438A - Band compressing and transmitting system - Google Patents

Band compressing and transmitting system

Info

Publication number
JPS56168438A
JPS56168438A JP7165880A JP7165880A JPS56168438A JP S56168438 A JPS56168438 A JP S56168438A JP 7165880 A JP7165880 A JP 7165880A JP 7165880 A JP7165880 A JP 7165880A JP S56168438 A JPS56168438 A JP S56168438A
Authority
JP
Japan
Prior art keywords
signal
modulated
modulated signal
band width
band
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
JP7165880A
Other languages
Japanese (ja)
Other versions
JPS6149858B2 (en
Inventor
Takekatsu Ooyama
Akito Umemoto
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.)
NEC Corp
Original Assignee
NEC Corp
Nippon 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 NEC Corp, Nippon Electric Co Ltd filed Critical NEC Corp
Priority to JP7165880A priority Critical patent/JPS56168438A/en
Publication of JPS56168438A publication Critical patent/JPS56168438A/en
Publication of JPS6149858B2 publication Critical patent/JPS6149858B2/ja
Granted 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
    • H04B1/66—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 for reducing bandwidth of signals; for improving efficiency of transmission

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Reduction Or Emphasis Of Bandwidth Of Signals (AREA)

Abstract

PURPOSE:To obtain a compressed signal, by giving a balanced modulation with a modulated signal to the signal to be modulated which has a band width of 1/2 modulated signal and extracting the lower-side band component of the modulation output. CONSTITUTION:A modulated input signal a1 is supplid through an input terminal 1, and a balanced modulation is given through a balanced modulator 2 to a carrier signal a1, i.e., the output of a carrier signal generator 3 having a frequency of fC= Bp/2+fL (BP: band width of modulated signal; fL: minimim frequency of modulated signal). The lower-side band e'2 becomes 1/2 to the modulated signal band width BP to be extracted by a separator 4. The signal e'2 receives radio transmission from a transmitter equipped with an FM modulator.
JP7165880A 1980-05-28 1980-05-28 Band compressing and transmitting system Granted JPS56168438A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7165880A JPS56168438A (en) 1980-05-28 1980-05-28 Band compressing and transmitting system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7165880A JPS56168438A (en) 1980-05-28 1980-05-28 Band compressing and transmitting system

Publications (2)

Publication Number Publication Date
JPS56168438A true JPS56168438A (en) 1981-12-24
JPS6149858B2 JPS6149858B2 (en) 1986-10-31

Family

ID=13466919

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7165880A Granted JPS56168438A (en) 1980-05-28 1980-05-28 Band compressing and transmitting system

Country Status (1)

Country Link
JP (1) JPS56168438A (en)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5317252A (en) * 1976-07-31 1978-02-17 Sony Corp Ssb modulator and demodulator

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5317252A (en) * 1976-07-31 1978-02-17 Sony Corp Ssb modulator and demodulator

Also Published As

Publication number Publication date
JPS6149858B2 (en) 1986-10-31

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