JPS5762640A - Mobile radio communication system - Google Patents

Mobile radio communication system

Info

Publication number
JPS5762640A
JPS5762640A JP55138150A JP13815080A JPS5762640A JP S5762640 A JPS5762640 A JP S5762640A JP 55138150 A JP55138150 A JP 55138150A JP 13815080 A JP13815080 A JP 13815080A JP S5762640 A JPS5762640 A JP S5762640A
Authority
JP
Japan
Prior art keywords
signal
pilot
mobile radio
switching circuit
detector
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
JP55138150A
Other languages
Japanese (ja)
Other versions
JPH0147057B2 (en
Inventor
Yoshio Nakamura
Yukio Ikoma
Kohei Nishino
Shozo Nishimura
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
Nippon Telegraph and Telephone Corp
Original Assignee
NEC Corp
Nippon Telegraph and Telephone 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 Telegraph and Telephone Corp, Nippon Electric Co Ltd filed Critical NEC Corp
Priority to JP55138150A priority Critical patent/JPS5762640A/en
Publication of JPS5762640A publication Critical patent/JPS5762640A/en
Publication of JPH0147057B2 publication Critical patent/JPH0147057B2/ja
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/24—Radio transmission systems, i.e. using radiation field for communication between two or more posts
    • H04B7/26—Radio transmission systems, i.e. using radiation field for communication between two or more posts at least one of which is mobile

Abstract

PURPOSE:To distinguish an interference wave level to prevent cross-talk between mobile radio stations having no control center station, by discriminating whether voice exists or not to transmit or break the transmittion output and by superposing a pilot signal onto the transmission wave. CONSTITUTION:During a call, a switching circuit 14 is closed by the output signal of a voice detector 9, and a transmission signal is transmitted together with the pilot signal from a pilot oscillator 11 from an antenna 15. When the voice signal from a transmitter 8 is not present, the switching circuit 14 is opened to break the transmission output. The receiving signal has the level measured by a receiving power detector 21 after demodulation, and the demodulated pilot signal closes a switching circuit 22 and is connected to a receiver 23 while it is detected by a pilot detector 24. When a receiving power detector 21 detects increments of the interference wave level, channel switching is instructed from a control device 25 to the other-party station. Thus, crosstalk between mobile radio stations is prevented.
JP55138150A 1980-10-02 1980-10-02 Mobile radio communication system Granted JPS5762640A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP55138150A JPS5762640A (en) 1980-10-02 1980-10-02 Mobile radio communication system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP55138150A JPS5762640A (en) 1980-10-02 1980-10-02 Mobile radio communication system

Publications (2)

Publication Number Publication Date
JPS5762640A true JPS5762640A (en) 1982-04-15
JPH0147057B2 JPH0147057B2 (en) 1989-10-12

Family

ID=15215176

Family Applications (1)

Application Number Title Priority Date Filing Date
JP55138150A Granted JPS5762640A (en) 1980-10-02 1980-10-02 Mobile radio communication system

Country Status (1)

Country Link
JP (1) JPS5762640A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61293028A (en) * 1985-06-20 1986-12-23 Sony Corp Transmitter-receiver
JPS6248136A (en) * 1985-08-27 1987-03-02 Nippon Telegr & Teleph Corp <Ntt> Control system of radiotelephony
JPS62207096A (en) * 1986-03-07 1987-09-11 Yuniden Kk Private branch exchange system for wireless telephone set

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61293028A (en) * 1985-06-20 1986-12-23 Sony Corp Transmitter-receiver
JPS6248136A (en) * 1985-08-27 1987-03-02 Nippon Telegr & Teleph Corp <Ntt> Control system of radiotelephony
JPS62207096A (en) * 1986-03-07 1987-09-11 Yuniden Kk Private branch exchange system for wireless telephone set

Also Published As

Publication number Publication date
JPH0147057B2 (en) 1989-10-12

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