JPS562756A - Simultaneous transmission and receiving mobile radio system - Google Patents

Simultaneous transmission and receiving mobile radio system

Info

Publication number
JPS562756A
JPS562756A JP7876979A JP7876979A JPS562756A JP S562756 A JPS562756 A JP S562756A JP 7876979 A JP7876979 A JP 7876979A JP 7876979 A JP7876979 A JP 7876979A JP S562756 A JPS562756 A JP S562756A
Authority
JP
Japan
Prior art keywords
mobile radio
filter
switching
talking
signal processing
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
JP7876979A
Other languages
Japanese (ja)
Other versions
JPS5829018B2 (en
Inventor
Seizo Seki
Hitoshi Komagata
Noboru Kan
Kensho Yoshikawa
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.)
Nippon Telegraph and Telephone Corp
Original Assignee
Nippon Telegraph and Telephone Corp
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 Nippon Telegraph and Telephone Corp filed Critical Nippon Telegraph and Telephone Corp
Priority to JP54078769A priority Critical patent/JPS5829018B2/en
Publication of JPS562756A publication Critical patent/JPS562756A/en
Publication of JPS5829018B2 publication Critical patent/JPS5829018B2/en
Expired 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Transceivers (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

PURPOSE:To make it possible to transmit and receive signals through a control channel even in talking with a simple method, by providing the center frequency variable band pass filter dependent upon the digital signal processing in the mobile radio equipment and by switching the center frequency of this filter in time division. CONSTITUTION:The mobile radio equipment which uses the mobile radio system to acquire selectively a specific one of plural radio channels and perform talking is provided with digital signal processing circuit 24, and further, center frequency variable band pass filter 31 dependent upon the digital signal processing is provided in circuit 24. Filter control part 34 is controlled by output of demodulating and discriminating part 32, transmission switching part 36, and operating part 35 operating the output of memory 25 in circuit 24, thereby not only switching the pass band of filter 31 but also controlling control channel 38. By this pass band switching and channel control, the report signal can be received through the control channel even in talking, and what is called call waiting service can be supplied.
JP54078769A 1979-06-22 1979-06-22 Simultaneous transmission and reception mobile radio system Expired JPS5829018B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP54078769A JPS5829018B2 (en) 1979-06-22 1979-06-22 Simultaneous transmission and reception mobile radio system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP54078769A JPS5829018B2 (en) 1979-06-22 1979-06-22 Simultaneous transmission and reception mobile radio system

Publications (2)

Publication Number Publication Date
JPS562756A true JPS562756A (en) 1981-01-13
JPS5829018B2 JPS5829018B2 (en) 1983-06-20

Family

ID=13671106

Family Applications (1)

Application Number Title Priority Date Filing Date
JP54078769A Expired JPS5829018B2 (en) 1979-06-22 1979-06-22 Simultaneous transmission and reception mobile radio system

Country Status (1)

Country Link
JP (1) JPS5829018B2 (en)

Also Published As

Publication number Publication date
JPS5829018B2 (en) 1983-06-20

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