WO1997008877A1 - Am compatible digital waveform demodulation using a dual fft - Google Patents
Am compatible digital waveform demodulation using a dual fft Download PDFInfo
- Publication number
- WO1997008877A1 WO1997008877A1 PCT/US1996/013526 US9613526W WO9708877A1 WO 1997008877 A1 WO1997008877 A1 WO 1997008877A1 US 9613526 W US9613526 W US 9613526W WO 9708877 A1 WO9708877 A1 WO 9708877A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- signal
- quadrature
- phase
- digital
- data
- Prior art date
Links
Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03D—DEMODULATION OR TRANSFERENCE OF MODULATION FROM ONE CARRIER TO ANOTHER
- H03D1/00—Demodulation of amplitude-modulated oscillations
- H03D1/22—Homodyne or synchrodyne circuits
- H03D1/2245—Homodyne or synchrodyne circuits using two quadrature channels
-
- 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
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04H—BROADCAST COMMUNICATION
- H04H2201/00—Aspects of broadcast communication
- H04H2201/10—Aspects of broadcast communication characterised by the type of broadcast system
- H04H2201/18—Aspects of broadcast communication characterised by the type of broadcast system in band on channel [IBOC]
- H04H2201/186—AM digital or hybrid
-
- 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
- H04L27/265—Fourier transform demodulators, e.g. fast Fourier transform [FFT] or discrete Fourier transform [DFT] demodulators
- H04L27/26522—Fourier transform demodulators, e.g. fast Fourier transform [FFT] or discrete Fourier transform [DFT] demodulators using partial FFTs
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Discrete Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Mathematical Physics (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Power Engineering (AREA)
- Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
- Circuits Of Receivers In General (AREA)
Abstract
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
BR9610614-0A BR9610614A (en) | 1995-08-31 | 1996-08-21 | Apparatus and process for demodulating a composite signal |
EP96928969A EP0847642A4 (en) | 1995-08-31 | 1996-08-21 | Am compatible digital waveform demodulation using a dual fft |
JP9510405A JPH11509066A (en) | 1995-08-31 | 1996-08-21 | AM compatible digital waveform demodulation using double FFT |
AU68539/96A AU6853996A (en) | 1995-08-31 | 1996-08-21 | Am compatible digital waveform demodulation using a dual fft |
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US301895P | 1995-08-31 | 1995-08-31 | |
US60/003,018 | 1995-08-31 | ||
US08/604,276 | 1996-02-21 | ||
US08/604,276 US5633896A (en) | 1996-02-21 | 1996-02-21 | AM compatible digital waveform demodulation using a dual FFT |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1997008877A1 true WO1997008877A1 (en) | 1997-03-06 |
Family
ID=26671176
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/US1996/013526 WO1997008877A1 (en) | 1995-08-31 | 1996-08-21 | Am compatible digital waveform demodulation using a dual fft |
Country Status (6)
Country | Link |
---|---|
EP (1) | EP0847642A4 (en) |
JP (1) | JPH11509066A (en) |
AU (1) | AU6853996A (en) |
BR (1) | BR9610614A (en) |
CA (1) | CA2233063A1 (en) |
WO (1) | WO1997008877A1 (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2000021261A1 (en) * | 1998-10-02 | 2000-04-13 | Usa Digital Radio, Inc. | Method and apparatus for demodulating and equalizing an am compatible digital audio broadcast signal |
ES2181550A1 (en) * | 2000-09-06 | 2003-02-16 | Univ Valencia Politecnica | Carrier selector in OFDM (Orthogonal Frequency Division Multiplexing) modulation |
US7406141B1 (en) | 2000-08-21 | 2008-07-29 | Broadcom Corporation | Multi-band DMT receiver |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6556639B1 (en) * | 1999-06-24 | 2003-04-29 | Ibiquity Digital Corporation | Method and apparatus for determining transmission mode and synchronization for a digital audio broadcasting signal |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5278826A (en) * | 1991-04-11 | 1994-01-11 | Usa Digital Radio | Method and apparatus for digital audio broadcasting and reception |
US5499271A (en) * | 1991-04-11 | 1996-03-12 | Institut Fur Rundfunktechnik Gmbh | Method for broadcasting a digitally coded stream of data using an already occupied frequency spectrum |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5128964A (en) * | 1990-10-10 | 1992-07-07 | Intelligent Modem Corporation | Modulation method and apparatus for multicarrier data transmission |
SG44771A1 (en) * | 1991-02-28 | 1997-12-19 | Philips Electronics Nv | System for broadcasting and receiving digital data receiver and transmitter for use in such system |
FR2707064B1 (en) * | 1993-06-21 | 1996-03-08 | France Telecom |
-
1996
- 1996-08-21 WO PCT/US1996/013526 patent/WO1997008877A1/en not_active Application Discontinuation
- 1996-08-21 BR BR9610614-0A patent/BR9610614A/en not_active Application Discontinuation
- 1996-08-21 JP JP9510405A patent/JPH11509066A/en active Pending
- 1996-08-21 AU AU68539/96A patent/AU6853996A/en not_active Abandoned
- 1996-08-21 EP EP96928969A patent/EP0847642A4/en not_active Withdrawn
- 1996-08-21 CA CA002233063A patent/CA2233063A1/en not_active Abandoned
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5278826A (en) * | 1991-04-11 | 1994-01-11 | Usa Digital Radio | Method and apparatus for digital audio broadcasting and reception |
US5499271A (en) * | 1991-04-11 | 1996-03-12 | Institut Fur Rundfunktechnik Gmbh | Method for broadcasting a digitally coded stream of data using an already occupied frequency spectrum |
Non-Patent Citations (1)
Title |
---|
See also references of EP0847642A4 * |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2000021261A1 (en) * | 1998-10-02 | 2000-04-13 | Usa Digital Radio, Inc. | Method and apparatus for demodulating and equalizing an am compatible digital audio broadcast signal |
AU753955B2 (en) * | 1998-10-02 | 2002-10-31 | Ibiquity Digital Corporation | Method and apparatus for demodulating and equalizing an AM compatible digital audio broadcast signal |
US7406141B1 (en) | 2000-08-21 | 2008-07-29 | Broadcom Corporation | Multi-band DMT receiver |
US7583742B2 (en) | 2000-08-21 | 2009-09-01 | Broadcom Corporation | Multi-band DMT receiver |
ES2181550A1 (en) * | 2000-09-06 | 2003-02-16 | Univ Valencia Politecnica | Carrier selector in OFDM (Orthogonal Frequency Division Multiplexing) modulation |
Also Published As
Publication number | Publication date |
---|---|
JPH11509066A (en) | 1999-08-03 |
AU6853996A (en) | 1997-03-19 |
CA2233063A1 (en) | 1997-03-06 |
EP0847642A4 (en) | 2001-09-12 |
EP0847642A1 (en) | 1998-06-17 |
BR9610614A (en) | 1999-12-21 |
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