JPS5657338A - Radio transmission system - Google Patents

Radio transmission system

Info

Publication number
JPS5657338A
JPS5657338A JP13287479A JP13287479A JPS5657338A JP S5657338 A JPS5657338 A JP S5657338A JP 13287479 A JP13287479 A JP 13287479A JP 13287479 A JP13287479 A JP 13287479A JP S5657338 A JPS5657338 A JP S5657338A
Authority
JP
Japan
Prior art keywords
frequency
signal
generator
receiver
carrier
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
JP13287479A
Other languages
Japanese (ja)
Inventor
Masaki Yoshimura
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
Priority to JP13287479A priority Critical patent/JPS5657338A/en
Publication of JPS5657338A publication Critical patent/JPS5657338A/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
    • H04B1/68—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 wholly or partially suppressing the carrier or one side band

Landscapes

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

Abstract

PURPOSE:To reduce the width of the occupied frequency band and then realize an effective use of the frequency, by transmitting the suppressed carrier both side band signal having such relation in which the frequency difference between the upper and lower side bands turns to the frequency of the low-frequency audible signal which is a signal source and in the form of the radio signal. CONSTITUTION:The circuit 1b is installed to the radio transmitter/receiver 1 to give a 1/2 frequency step-down to the aural signal f1 which was converted through the carrier generator 1c, the balanced modulator 1d and the microphone 1a each. At the same time, the reception part RX is installed to the transmitter/receiver 1 to be used alternately with the transmission part. Then a balanced modulatin is given via the modulator 1d to the carrier wave of the frequency f0 (f0>f1) supplied from the generator 1c and by the step-down signal f1/2 delivered from the generator 1c and by the frequency f0+ or -f1/2 is used for the upper and lower side bands to deliver the suppressed carrier both side band modulation signal f0+ or -f1/2. And this signal is received by the AM-system receiver 2 to reduce the width of the occupied frequency band down to 1/2. Thus an effective use is secured for the frequency.
JP13287479A 1979-10-17 1979-10-17 Radio transmission system Pending JPS5657338A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP13287479A JPS5657338A (en) 1979-10-17 1979-10-17 Radio transmission system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP13287479A JPS5657338A (en) 1979-10-17 1979-10-17 Radio transmission system

Publications (1)

Publication Number Publication Date
JPS5657338A true JPS5657338A (en) 1981-05-19

Family

ID=15091567

Family Applications (1)

Application Number Title Priority Date Filing Date
JP13287479A Pending JPS5657338A (en) 1979-10-17 1979-10-17 Radio transmission system

Country Status (1)

Country Link
JP (1) JPS5657338A (en)

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