JPS5691547A - Tdm-fdm conversion system - Google Patents

Tdm-fdm conversion system

Info

Publication number
JPS5691547A
JPS5691547A JP16985779A JP16985779A JPS5691547A JP S5691547 A JPS5691547 A JP S5691547A JP 16985779 A JP16985779 A JP 16985779A JP 16985779 A JP16985779 A JP 16985779A JP S5691547 A JPS5691547 A JP S5691547A
Authority
JP
Japan
Prior art keywords
signal
fdm
tdm
frequency
multiplication
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
JP16985779A
Other languages
Japanese (ja)
Inventor
Fumio Amano
Tetsuo Soejima
Kazuo Murano
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.)
Fujitsu Ltd
Original Assignee
Fujitsu 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 Fujitsu Ltd filed Critical Fujitsu Ltd
Priority to JP16985779A priority Critical patent/JPS5691547A/en
Publication of JPS5691547A publication Critical patent/JPS5691547A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J4/00—Combined time-division and frequency-division multiplex systems
    • H04J4/005—Transmultiplexing

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Time-Division Multiplex Systems (AREA)

Abstract

PURPOSE:To enable simple constitution to convert an IDM (time-division multiplex) signal into an FDM (frequency-division multiplex) signal and reversely, by using a means of adding and subtracting of complex signals of a plurality of channels. CONSTITUTION:When a TDM signal is converted into an FDM signal, each signal of TDM is separated by multiplex separation part DEMUX into signal xe(nT) corresponding to respective channels and (-j) is raised to n-th power to perform processing equivalent to a shift in frequency of -2kHz; and each result is passed through cyclic digital filter H0 with steep characteristics of 8kHz operation and acyclic digital filter H1 with gentle characteristics and after multiplication and addition for frequency shifts corresponding to respective channels are carried out, multiplication by j<n> is done to find its actual component Re[.], obtaining the FDM signal.
JP16985779A 1979-12-26 1979-12-26 Tdm-fdm conversion system Pending JPS5691547A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP16985779A JPS5691547A (en) 1979-12-26 1979-12-26 Tdm-fdm conversion system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP16985779A JPS5691547A (en) 1979-12-26 1979-12-26 Tdm-fdm conversion system

Publications (1)

Publication Number Publication Date
JPS5691547A true JPS5691547A (en) 1981-07-24

Family

ID=15894219

Family Applications (1)

Application Number Title Priority Date Filing Date
JP16985779A Pending JPS5691547A (en) 1979-12-26 1979-12-26 Tdm-fdm conversion system

Country Status (1)

Country Link
JP (1) JPS5691547A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5323255A (en) * 1991-05-08 1994-06-21 Alcatel N.V. Transceiver arrangement using TDM to transmit assigned subcarrier waveforms

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5323255A (en) * 1991-05-08 1994-06-21 Alcatel N.V. Transceiver arrangement using TDM to transmit assigned subcarrier waveforms

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