JPS55115744A - Intermediate frequency set method for mobile radio unit - Google Patents

Intermediate frequency set method for mobile radio unit

Info

Publication number
JPS55115744A
JPS55115744A JP2183479A JP2183479A JPS55115744A JP S55115744 A JPS55115744 A JP S55115744A JP 2183479 A JP2183479 A JP 2183479A JP 2183479 A JP2183479 A JP 2183479A JP S55115744 A JPS55115744 A JP S55115744A
Authority
JP
Japan
Prior art keywords
reception
waves
frequency
spurious
fch
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
JP2183479A
Other languages
Japanese (ja)
Other versions
JPS5820172B2 (en
Inventor
Ryoji Kawasaki
Suomi Yuki
Noboru Kan
Seizo Seki
Kenkichi Hiraide
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 JP54021834A priority Critical patent/JPS5820172B2/en
Publication of JPS55115744A publication Critical patent/JPS55115744A/en
Publication of JPS5820172B2 publication Critical patent/JPS5820172B2/en
Expired 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
    • H04B1/06—Receivers
    • H04B1/10—Means associated with receiver for limiting or suppressing noise or interference

Abstract

PURPOSE:To reduce the effect of spurious reception by using the effect of frequency interleaving for the spurious waves taking the transmission wave of itself as virtual local oosillation and the desired waves. CONSTITUTION:In the mobile communication system, with the channel frequency distance fch (e.g., 25kHz constant) and with transmission and reception frequency distance fse=fchXp(where; p is a positive integer number and fse=50MHz for example), having the radio channels of K as transmission and reception use, when the reception intermediate frequency fif for desired waves is selected as (2n-1)/2 times the channel frequency distance fch (where; n is a positive integer number), that is, when the center frequency of the reception IF circuit is set as fif=fchX (2n-1)/2, equation (4) is obtained. Where; fif' is the frequency when the spurious waves are received to the reception IF circuit, r=p+ or -q-n and p, q, n are positive integers. Accordingly, according to equation (4), at the reception IF circuit, the desired waves and spurious waves can be received with an odd number times fch/2 a part from each other.
JP54021834A 1979-02-28 1979-02-28 How to set the intermediate frequency of mobile radio equipment Expired JPS5820172B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP54021834A JPS5820172B2 (en) 1979-02-28 1979-02-28 How to set the intermediate frequency of mobile radio equipment

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP54021834A JPS5820172B2 (en) 1979-02-28 1979-02-28 How to set the intermediate frequency of mobile radio equipment

Publications (2)

Publication Number Publication Date
JPS55115744A true JPS55115744A (en) 1980-09-05
JPS5820172B2 JPS5820172B2 (en) 1983-04-21

Family

ID=12066093

Family Applications (1)

Application Number Title Priority Date Filing Date
JP54021834A Expired JPS5820172B2 (en) 1979-02-28 1979-02-28 How to set the intermediate frequency of mobile radio equipment

Country Status (1)

Country Link
JP (1) JPS5820172B2 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58161432A (en) * 1982-03-18 1983-09-26 Nec Corp Radio transmitter and receiver
JPH08162995A (en) * 1994-12-12 1996-06-21 Nec Corp One frequency simplex communication system radio equipment

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58161432A (en) * 1982-03-18 1983-09-26 Nec Corp Radio transmitter and receiver
JPH0123012B2 (en) * 1982-03-18 1989-04-28 Nippon Electric Co
JPH08162995A (en) * 1994-12-12 1996-06-21 Nec Corp One frequency simplex communication system radio equipment

Also Published As

Publication number Publication date
JPS5820172B2 (en) 1983-04-21

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