JPS6346620B2 - - Google Patents
Info
- Publication number
- JPS6346620B2 JPS6346620B2 JP54019365A JP1936579A JPS6346620B2 JP S6346620 B2 JPS6346620 B2 JP S6346620B2 JP 54019365 A JP54019365 A JP 54019365A JP 1936579 A JP1936579 A JP 1936579A JP S6346620 B2 JPS6346620 B2 JP S6346620B2
- Authority
- JP
- Japan
- Prior art keywords
- offset
- circuit
- output
- complex
- outputs
- 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
Links
- 238000012545 processing Methods 0.000 claims description 23
- 238000005070 sampling Methods 0.000 claims description 11
- 230000005540 biological transmission Effects 0.000 claims description 10
- 238000012805 post-processing Methods 0.000 claims description 9
- 238000007781 pre-processing Methods 0.000 claims description 5
- 238000000034 method Methods 0.000 claims description 4
- 239000000969 carrier Substances 0.000 claims description 3
- 230000001360 synchronised effect Effects 0.000 claims description 3
- 239000000284 extract Substances 0.000 claims 4
- 238000010586 diagram Methods 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 230000008054 signal transmission Effects 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
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)
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 JPS55112055A (en) | 1980-08-29 |
JPS6346620B2 true JPS6346620B2 (zh) | 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 (zh) |
-
1979
- 1979-02-21 JP JP1936579A patent/JPS55112055A/ja active Granted
Also Published As
Publication number | Publication date |
---|---|
JPS55112055A (en) | 1980-08-29 |
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