JPS6346621B2 - - Google Patents

Info

Publication number
JPS6346621B2
JPS6346621B2 JP54019366A JP1936679A JPS6346621B2 JP S6346621 B2 JPS6346621 B2 JP S6346621B2 JP 54019366 A JP54019366 A JP 54019366A JP 1936679 A JP1936679 A JP 1936679A JP S6346621 B2 JPS6346621 B2 JP S6346621B2
Authority
JP
Japan
Prior art keywords
point
offset
signal
complex
seconds
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.)
Expired
Application number
JP54019366A
Other languages
English (en)
Japanese (ja)
Other versions
JPS55112056A (en
Inventor
Botaro Hirosaki
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
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 Nippon Electric Co Ltd filed Critical Nippon Electric Co Ltd
Priority to JP1936679A priority Critical patent/JPS55112056A/ja
Priority to US06/121,943 priority patent/US4300229A/en
Priority to AU55634/80A priority patent/AU527333B2/en
Priority to CA000346089A priority patent/CA1134519A/en
Publication of JPS55112056A publication Critical patent/JPS55112056A/ja
Publication of JPS6346621B2 publication Critical patent/JPS6346621B2/ja
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/26—Systems using multi-frequency codes
    • H04L27/2601—Multicarrier modulation systems
    • H04L27/2626—Arrangements specific to the transmitter only
    • H04L27/2627—Modulators
    • H04L27/2628—Inverse Fourier transform modulators, e.g. inverse fast Fourier transform [IFFT] or inverse discrete Fourier transform [IDFT] modulators
    • H04L27/2631—Inverse Fourier transform modulators, e.g. inverse fast Fourier transform [IFFT] or inverse discrete Fourier transform [IDFT] modulators with polyphase implementation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/26—Systems using multi-frequency codes
    • H04L27/2601—Multicarrier modulation systems
    • H04L27/2626—Arrangements specific to the transmitter only
    • H04L27/2627—Modulators
    • H04L27/2634—Inverse fast Fourier transform [IFFT] or inverse discrete Fourier transform [IDFT] modulators in combination with other circuits for modulation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/26—Systems using multi-frequency codes
    • H04L27/2601—Multicarrier modulation systems
    • H04L27/2647—Arrangements specific to the receiver only
    • H04L27/2649—Demodulators
    • H04L27/26524—Fast Fourier transform [FFT] or discrete Fourier transform [DFT] demodulators in combination with other circuits for demodulation

Landscapes

  • Physics & Mathematics (AREA)
  • Discrete Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Mathematical Physics (AREA)
  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
JP1936679A 1979-02-21 1979-02-21 Digital process type receiver for orthogonal multiple signal Granted JPS55112056A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
JP1936679A JPS55112056A (en) 1979-02-21 1979-02-21 Digital process type receiver for orthogonal multiple signal
US06/121,943 US4300229A (en) 1979-02-21 1980-02-15 Transmitter and receiver for an othogonally multiplexed QAM signal of a sampling rate N times that of PAM signals, comprising an N/2-point offset fourier transform processor
AU55634/80A AU527333B2 (en) 1979-02-21 1980-02-18 Multi pam signals to ortho multiplex qam converter
CA000346089A CA1134519A (en) 1979-02-21 1980-02-20 Transmitter and receiver for an orthogonally multiplexed qam signal of a sampling rate n times that of pam signals, comprising an n/2-point offset fourier transform processor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1936679A JPS55112056A (en) 1979-02-21 1979-02-21 Digital process type receiver for orthogonal multiple signal

Publications (2)

Publication Number Publication Date
JPS55112056A JPS55112056A (en) 1980-08-29
JPS6346621B2 true JPS6346621B2 (enExample) 1988-09-16

Family

ID=11997347

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1936679A Granted JPS55112056A (en) 1979-02-21 1979-02-21 Digital process type receiver for orthogonal multiple signal

Country Status (1)

Country Link
JP (1) JPS55112056A (enExample)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IN158693B (enExample) * 1981-12-22 1987-01-03 Westinghouse Brake & Signal

Also Published As

Publication number Publication date
JPS55112056A (en) 1980-08-29

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