JPS5724139A - Carrier communication system - Google Patents

Carrier communication system

Info

Publication number
JPS5724139A
JPS5724139A JP9954180A JP9954180A JPS5724139A JP S5724139 A JPS5724139 A JP S5724139A JP 9954180 A JP9954180 A JP 9954180A JP 9954180 A JP9954180 A JP 9954180A JP S5724139 A JPS5724139 A JP S5724139A
Authority
JP
Japan
Prior art keywords
band
filters
388khz
suppressed
constitution
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
JP9954180A
Other languages
Japanese (ja)
Inventor
Kazuo Aoki
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
Original Assignee
NEC 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 Electric Co Ltd filed Critical NEC Corp
Priority to JP9954180A priority Critical patent/JPS5724139A/en
Publication of JPS5724139A publication Critical patent/JPS5724139A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J1/00—Frequency-division multiplex systems
    • H04J1/02—Details
    • H04J1/04—Frequency-transposition arrangements

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)

Abstract

PURPOSE:To simplify the constitution with less number of capacitors and coils constituting filters of a channel converter, in a carrier communication system. CONSTITUTION:Input signals P1-P3 applied to modulators M1-M3 at the transmission side are modulated at with carrier waves C1, C2 and C3, a part of unnecessary components (high-band side) is suppressed at a low-pass filter connected to the post stage, the output of filters F11, F21, F31 is coupled by a coupler H1 and remaining unnecessary components at the low band are suppressed by a high pass filter F4. Cutoff frequencies of filters F4, F11, and F12, F21, and F22, F31 and F32 are 8,516kHz, 9,748kHz, 11,068kHz, and 12,388kHz, respectively. On the other hand, a transmission signal having the band of 8,516-12,388kHz at the reception side is distributed by a distributor H2 and supplied to low-pass filters F12, F22, F32, and frequency components at high band are suppressed for 9,748kHz for F12, 11,068kHz for F22 and 12,388kHz for F32 and connected to modulators M4-M6 for demodulation. Thus, a channel converter can be formed without using band pass filters of complicated constitution.
JP9954180A 1980-07-21 1980-07-21 Carrier communication system Pending JPS5724139A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP9954180A JPS5724139A (en) 1980-07-21 1980-07-21 Carrier communication system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9954180A JPS5724139A (en) 1980-07-21 1980-07-21 Carrier communication system

Publications (1)

Publication Number Publication Date
JPS5724139A true JPS5724139A (en) 1982-02-08

Family

ID=14250043

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9954180A Pending JPS5724139A (en) 1980-07-21 1980-07-21 Carrier communication system

Country Status (1)

Country Link
JP (1) JPS5724139A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0298036U (en) * 1989-01-23 1990-08-03

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0298036U (en) * 1989-01-23 1990-08-03

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