JPS56165428A - Lincompex radio device - Google Patents

Lincompex radio device

Info

Publication number
JPS56165428A
JPS56165428A JP6940880A JP6940880A JPS56165428A JP S56165428 A JPS56165428 A JP S56165428A JP 6940880 A JP6940880 A JP 6940880A JP 6940880 A JP6940880 A JP 6940880A JP S56165428 A JPS56165428 A JP S56165428A
Authority
JP
Japan
Prior art keywords
signal
demodulator
amplifier
residual carrier
control channel
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
JP6940880A
Other languages
Japanese (ja)
Inventor
Hiroshi Haruki
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.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial 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 Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to JP6940880A priority Critical patent/JPS56165428A/en
Publication of JPS56165428A publication Critical patent/JPS56165428A/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
    • H04B1/62—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 providing a predistortion of the signal in the transmitter and corresponding correction in the receiver, e.g. for improving the signal/noise ratio
    • H04B1/64—Volume compression or expansion arrangements

Abstract

PURPOSE:To eliminate the frequency variance between transmission and reception to ensure a good demodulation, by transmitting the residual carrier component with a superposition on a voice channel and a control channel and using the residual carrier component for a demodulating injection carrier. CONSTITUTION:At the transmitter side, the residual carrier components of low levels are transmitted simultaneously with a superposition on a voice channel and a control channel. At the receiver side, the arrived signal is amplified by an RF amplifier 1 and then converted into an intermediate frequency through a mixer 2 and the 1st local oscillator 8. This signal is applied to a demodulator 5 through a crystal filter 3 and an IF amplifier 4 as well as to a narrow band carrier filter 10. Thus the residual carrier of the IF band is extracted and amplified through an amplifier 11 to be injected to the demodulator 5. The lincompex signal is demodulated to the AF band by the demodulator 5 and then separated into the voice channel and the control channel by a branching filter 6, and the both signals are synthesized to reproduce an aural signal.
JP6940880A 1980-05-23 1980-05-23 Lincompex radio device Pending JPS56165428A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP6940880A JPS56165428A (en) 1980-05-23 1980-05-23 Lincompex radio device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6940880A JPS56165428A (en) 1980-05-23 1980-05-23 Lincompex radio device

Publications (1)

Publication Number Publication Date
JPS56165428A true JPS56165428A (en) 1981-12-19

Family

ID=13401740

Family Applications (1)

Application Number Title Priority Date Filing Date
JP6940880A Pending JPS56165428A (en) 1980-05-23 1980-05-23 Lincompex radio device

Country Status (1)

Country Link
JP (1) JPS56165428A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5631612A (en) * 1991-10-28 1997-05-20 Fujitsu Limited Surface acoustic wave filter
USRE40036E1 (en) 1991-10-28 2008-01-29 Fujitsu Limited Surface acoustic wave filter

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5232609A (en) * 1975-09-09 1977-03-12 Sony Corp Receiver

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5232609A (en) * 1975-09-09 1977-03-12 Sony Corp Receiver

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5631612A (en) * 1991-10-28 1997-05-20 Fujitsu Limited Surface acoustic wave filter
USRE37375E1 (en) 1991-10-28 2001-09-18 Fujitsu Limited Surface acoustic wave filter
USRE37790E1 (en) 1991-10-28 2002-07-16 Fujitsu Limited Surface acoustic wave filter
USRE40036E1 (en) 1991-10-28 2008-01-29 Fujitsu Limited Surface acoustic wave filter

Similar Documents

Publication Publication Date Title
GB1490399A (en) Fm stereophonic signal demodulators
MY103727A (en) Arrangement for filtering a received fm signal
SE9703617D0 (en) Methods and apparatus for radio communication systems
EP0036431A4 (en) Transmitter having a phase-locked loop.
EP0130692A3 (en) A technique for the time frequency multiplexing of three television signals
JPS56165428A (en) Lincompex radio device
DE69113624D1 (en) RADIO TEST LOOP FOR RADIO TRANSMITTERS / RECEIVERS.
WO1998020623A3 (en) System and method of downconversion where the received signal is downconverted
JPS5665546A (en) Radio retransmission system
JPS572135A (en) Radio telephone system
JPS575442A (en) Fm receiver
JPS572145A (en) Radio transmission system
JPS5493314A (en) Transmission and reception system
JPS57202198A (en) Portable stereo audio equipment
JPS5260518A (en) Television system for voice communication
JPS5690637A (en) Modulation and phase synchronization system
JPS57174943A (en) Power line carrier device
JPS5636242A (en) Satellite communication system
JPS5762640A (en) Mobile radio communication system
JPS5556743A (en) Simple privacy telephone set
GB2011762A (en) Transmission of speech
JPS5620345A (en) Fm stereophonic tuner circuit
JPS56114453A (en) Fm feedback type demodulating circuit
JPS5791067A (en) Data transmission and reception device
GB493026A (en) Improvements in or relating to radio communication systems