JPS55112055A - Digital process type transmitter for orthogonal multiple signal - Google Patents

Digital process type transmitter for orthogonal multiple signal

Info

Publication number
JPS55112055A
JPS55112055A JP1936579A JP1936579A JPS55112055A JP S55112055 A JPS55112055 A JP S55112055A JP 1936579 A JP1936579 A JP 1936579A JP 1936579 A JP1936579 A JP 1936579A JP S55112055 A JPS55112055 A JP S55112055A
Authority
JP
Japan
Prior art keywords
circuit
output
offset
number part
real
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
JP1936579A
Other languages
English (en)
Japanese (ja)
Other versions
JPS6346620B2 (enrdf_load_stackoverflow
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
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 JP1936579A priority Critical patent/JPS55112055A/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 JPS55112055A publication Critical patent/JPS55112055A/ja
Publication of JPS6346620B2 publication Critical patent/JPS6346620B2/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)
JP1936579A 1979-02-21 1979-02-21 Digital process type transmitter for orthogonal multiple signal Granted JPS55112055A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
JP1936579A JPS55112055A (en) 1979-02-21 1979-02-21 Digital process type transmitter 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
JP1936579A JPS55112055A (en) 1979-02-21 1979-02-21 Digital process type transmitter for orthogonal multiple signal

Publications (2)

Publication Number Publication Date
JPS55112055A true JPS55112055A (en) 1980-08-29
JPS6346620B2 JPS6346620B2 (enrdf_load_stackoverflow) 1988-09-16

Family

ID=11997320

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1936579A Granted JPS55112055A (en) 1979-02-21 1979-02-21 Digital process type transmitter for orthogonal multiple signal

Country Status (1)

Country Link
JP (1) JPS55112055A (enrdf_load_stackoverflow)

Also Published As

Publication number Publication date
JPS6346620B2 (enrdf_load_stackoverflow) 1988-09-16

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