JPS54149509A - Mobile radio communication system - Google Patents

Mobile radio communication system

Info

Publication number
JPS54149509A
JPS54149509A JP5766378A JP5766378A JPS54149509A JP S54149509 A JPS54149509 A JP S54149509A JP 5766378 A JP5766378 A JP 5766378A JP 5766378 A JP5766378 A JP 5766378A JP S54149509 A JPS54149509 A JP S54149509A
Authority
JP
Japan
Prior art keywords
frequency
reception
spurious
mobile radio
transmission
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
JP5766378A
Other languages
Japanese (ja)
Inventor
Yoshiyuki Iwama
Mitsuo Toritani
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.)
Hitachi Ltd
Original Assignee
Hitachi 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 Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP5766378A priority Critical patent/JPS54149509A/en
Publication of JPS54149509A publication Critical patent/JPS54149509A/en
Pending legal-status Critical Current

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Landscapes

  • Transceivers (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

PURPOSE: To eliminate the need for filtering off a reception spurious-frequency component, by apparently regarding disturbance noises as a side tone by setting a transmission frequency to the corresponding spurious frequency of the reception part.
CONSTITUTION: As one of factors of spurious generation, a mobile radio equipment on a duplex system bears a relation of intermediate frequency fif=nfs∼mft [(fs) is a reception spurious frequency, (ft) is a transmission frequency, and (n) and (m) are integers]. Especially, when a relation of fs=ft+fif/2 is within the reception frequency band, a beat between reception spurious (fs) and transmission frequency (ft) drops into the intermediate frequency band of reception part 15 so as to prevent the malfunction. For the purpose, difference (f▵) with the transmission frequency is set to half intermediate frequency (fif). As a result, reception spurious (fs3) agrees with reception frequency (fr2) and there is no need to suppress the reception spurious frequency fs=ft+fif/2 by filter 18.
COPYRIGHT: (C)1979,JPO&Japio
JP5766378A 1978-05-17 1978-05-17 Mobile radio communication system Pending JPS54149509A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP5766378A JPS54149509A (en) 1978-05-17 1978-05-17 Mobile radio communication system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5766378A JPS54149509A (en) 1978-05-17 1978-05-17 Mobile radio communication system

Publications (1)

Publication Number Publication Date
JPS54149509A true JPS54149509A (en) 1979-11-22

Family

ID=13062133

Family Applications (1)

Application Number Title Priority Date Filing Date
JP5766378A Pending JPS54149509A (en) 1978-05-17 1978-05-17 Mobile radio communication system

Country Status (1)

Country Link
JP (1) JPS54149509A (en)

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