TW200741487A - Circular fast fourier transform - Google Patents
Circular fast fourier transformInfo
- Publication number
- TW200741487A TW200741487A TW095144476A TW95144476A TW200741487A TW 200741487 A TW200741487 A TW 200741487A TW 095144476 A TW095144476 A TW 095144476A TW 95144476 A TW95144476 A TW 95144476A TW 200741487 A TW200741487 A TW 200741487A
- Authority
- TW
- Taiwan
- Prior art keywords
- output ports
- logic output
- swap logic
- swap
- input samples
- Prior art date
Links
Classifications
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F17/00—Digital computing or data processing equipment or methods, specially adapted for specific functions
- G06F17/10—Complex mathematical operations
- G06F17/14—Fourier, Walsh or analogous domain transformations, e.g. Laplace, Hilbert, Karhunen-Loeve, transforms
- G06F17/141—Discrete Fourier transforms
- G06F17/142—Fast Fourier transforms, e.g. using a Cooley-Tukey type algorithm
-
- 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
-
- 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
- H04L27/2651—Modification of fast Fourier transform [FFT] or discrete Fourier transform [DFT] demodulators for performance improvement
-
- 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
- H04L27/2655—Synchronisation arrangements
- H04L27/2662—Symbol synchronisation
Landscapes
- Physics & Mathematics (AREA)
- Mathematical Physics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Discrete Mathematics (AREA)
- Mathematical Analysis (AREA)
- Signal Processing (AREA)
- Computational Mathematics (AREA)
- Computer Networks & Wireless Communication (AREA)
- Mathematical Optimization (AREA)
- Pure & Applied Mathematics (AREA)
- Data Mining & Analysis (AREA)
- Theoretical Computer Science (AREA)
- Algebra (AREA)
- Databases & Information Systems (AREA)
- Software Systems (AREA)
- General Engineering & Computer Science (AREA)
- Complex Calculations (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US11/302,243 US7685220B2 (en) | 2005-12-14 | 2005-12-14 | Circular fast fourier transform |
Publications (1)
Publication Number | Publication Date |
---|---|
TW200741487A true TW200741487A (en) | 2007-11-01 |
Family
ID=38051780
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
TW095144476A TW200741487A (en) | 2005-12-14 | 2006-11-30 | Circular fast fourier transform |
Country Status (8)
Country | Link |
---|---|
US (1) | US7685220B2 (zh) |
EP (1) | EP1960905A2 (zh) |
JP (1) | JP4903810B2 (zh) |
KR (1) | KR101229648B1 (zh) |
CN (1) | CN101331479B (zh) |
BR (1) | BRPI0619920A2 (zh) |
TW (1) | TW200741487A (zh) |
WO (1) | WO2007068438A2 (zh) |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102005045519A1 (de) * | 2005-09-23 | 2007-03-29 | Newlogic Technologies Ag | Verfahren und Vorrichtung zur FFT Berechnung |
DE602006013964D1 (de) * | 2006-07-18 | 2010-06-10 | Ericsson Telefon Ab L M | Faltung von Eingabedatenwerten für eine Transformation |
CN101930425B (zh) * | 2009-06-24 | 2015-09-30 | 华为技术有限公司 | 信号处理方法、数据处理方法及装置 |
CN102592601B (zh) * | 2011-01-10 | 2014-09-17 | 华为技术有限公司 | 一种信号处理方法和装置 |
CN102152910B (zh) * | 2011-04-27 | 2013-04-10 | 山东电力研究院 | 滤膜存放箱 |
CN102955760A (zh) * | 2011-08-23 | 2013-03-06 | 上海华魏光纤传感技术有限公司 | 基于dif的基-2并行fft处理器及其处理方法 |
US11129596B2 (en) * | 2016-10-06 | 2021-09-28 | General Electric Company | Systems and methods for ultrasound multiplexing |
Family Cites Families (34)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3638004A (en) | 1968-10-28 | 1972-01-25 | Time Data Corp | Fourier transform computer |
US3767905A (en) | 1971-05-12 | 1973-10-23 | Solartron Electronic Group | Addressable memory fft processor with exponential term generation |
US3927312A (en) | 1974-10-31 | 1975-12-16 | Us Army | Vector rotator |
US4327367A (en) * | 1978-04-24 | 1982-04-27 | Electric Power Research Institute, Inc. | Thyristor with even turn-on line potential and method with 1-micron to 5-mil wide alignment region band |
US4231102A (en) | 1978-12-21 | 1980-10-28 | Raytheon Company | Cordic FFT processor |
US4563750A (en) | 1983-03-04 | 1986-01-07 | Clarke William L | Fast Fourier transform apparatus with data timing schedule decoupling |
FR2584213B1 (fr) | 1985-06-28 | 1994-03-11 | Thomson Csf | Dispositif de calcul d'une transformee de fourier discrete, glissante, et son application a un systeme radar. |
FR2587819B1 (fr) | 1985-09-24 | 1989-10-06 | Thomson Csf | Dispositif de calcul d'une transformee de fourier discrete, glissante et non recursive, et son application a un systeme radar |
FR2588680B1 (fr) | 1985-10-16 | 1989-08-25 | Thomson Csf | Dispositif de calcul d'une transformee de fourier discrete, et son application a la compression d'impulsion dans un systeme radar |
US5034910A (en) | 1988-03-14 | 1991-07-23 | E-Systems, Inc. | Systolic fast Fourier transform method and apparatus |
JPH05158967A (ja) | 1991-12-05 | 1993-06-25 | Nec Corp | 計算機システム |
US5371696A (en) | 1992-12-24 | 1994-12-06 | Sundararajan; Duraisamy | Computational structures for the fast Fourier transform analyzers |
US5577072A (en) | 1994-03-07 | 1996-11-19 | Hyundai Electronics Industries Co., Ltd. | Timing phase detector and timing recovery using the same |
JP3541526B2 (ja) * | 1995-10-24 | 2004-07-14 | 日本ビクター株式会社 | 周波数分割多重信号生成方法及び復号方法 |
US5717620A (en) | 1995-10-24 | 1998-02-10 | Airnet Communications Corporation | Improved-accuracy fast-Fourier-transform butterfly circuit |
JP3821316B2 (ja) | 1996-08-06 | 2006-09-13 | ソニー株式会社 | 演算装置および方法 |
JP3797400B2 (ja) | 1997-05-23 | 2006-07-19 | ソニー株式会社 | 演算装置および方法 |
US6370188B1 (en) | 1999-03-31 | 2002-04-09 | Texas Instruments Incorporated | Phase and frequency offset compensation in a telecommunications receiver |
FR2794921B1 (fr) * | 1999-06-14 | 2001-09-14 | St Microelectronics Sa | Procede et dispositif de transformation de donnees reelles en symboles complexes, notamment pour la reception de porteuses modulees en phase et en amplitude et transmises sur une ligne telephonique |
US6658441B1 (en) | 1999-08-02 | 2003-12-02 | Seung Pil Kim | Apparatus and method for recursive parallel and pipelined fast fourier transform |
US6772181B1 (en) | 1999-10-29 | 2004-08-03 | Pentomics, Inc. | Apparatus and method for trigonometric interpolation |
US6567042B2 (en) | 2000-12-04 | 2003-05-20 | The United States Of America As Represented By The Secretary Of The Air Force | Acquisition through circular correlation by partition for GPS C/A code and P(Y) code |
US6633616B2 (en) | 2001-02-21 | 2003-10-14 | Magis Networks, Inc. | OFDM pilot tone tracking for wireless LAN |
US7020218B2 (en) | 2001-06-18 | 2006-03-28 | Arnesen David M | Sliding-window transform with integrated windowing |
US7020222B2 (en) | 2001-10-24 | 2006-03-28 | Texas Instruments Incorporated | Efficient method and system for offset phasor determination |
US20030182342A1 (en) | 2002-03-25 | 2003-09-25 | Murphy Charles Douglas | Low-cost multiplication in small DFT butterflies |
CN1180592C (zh) * | 2002-04-01 | 2004-12-15 | 北京六合万通微电子技术有限公司 | 快速傅立叶变换和反变换的模拟数字混合电路及其在通信系统中的应用 |
CN100563226C (zh) * | 2002-06-27 | 2009-11-25 | 三星电子株式会社 | 利用混合基数快速付里叶变换的调制设备 |
JP2004032568A (ja) * | 2002-06-28 | 2004-01-29 | Hitachi Kokusai Electric Inc | 相関検出装置およびフーリエ変換装置 |
US7082451B2 (en) | 2002-09-09 | 2006-07-25 | Freescale Semiconductor, Inc. | Reconfigurable vector-FFT/IFFT, vector-multiplier/divider |
US20050015420A1 (en) | 2003-07-18 | 2005-01-20 | Gibb Sean G. | Recoded radix-2 pipeline FFT processor |
US8266196B2 (en) * | 2005-03-11 | 2012-09-11 | Qualcomm Incorporated | Fast Fourier transform twiddle multiplication |
US8229014B2 (en) * | 2005-03-11 | 2012-07-24 | Qualcomm Incorporated | Fast fourier transform processing in an OFDM system |
JP4698394B2 (ja) * | 2005-11-25 | 2011-06-08 | パナソニック株式会社 | 高速フーリエ変換回路 |
-
2005
- 2005-12-14 US US11/302,243 patent/US7685220B2/en not_active Expired - Fee Related
-
2006
- 2006-11-30 TW TW095144476A patent/TW200741487A/zh unknown
- 2006-12-12 BR BRPI0619920-8A patent/BRPI0619920A2/pt not_active IP Right Cessation
- 2006-12-12 KR KR1020087017045A patent/KR101229648B1/ko not_active IP Right Cessation
- 2006-12-12 CN CN2006800472468A patent/CN101331479B/zh not_active Expired - Fee Related
- 2006-12-12 JP JP2008544853A patent/JP4903810B2/ja not_active Expired - Fee Related
- 2006-12-12 EP EP06829521A patent/EP1960905A2/en not_active Withdrawn
- 2006-12-12 WO PCT/EP2006/011935 patent/WO2007068438A2/en active Application Filing
Also Published As
Publication number | Publication date |
---|---|
US20070133389A1 (en) | 2007-06-14 |
JP2009519637A (ja) | 2009-05-14 |
US7685220B2 (en) | 2010-03-23 |
WO2007068438A3 (en) | 2008-06-05 |
JP4903810B2 (ja) | 2012-03-28 |
WO2007068438A2 (en) | 2007-06-21 |
EP1960905A2 (en) | 2008-08-27 |
CN101331479B (zh) | 2012-01-11 |
BRPI0619920A2 (pt) | 2011-10-25 |
CN101331479A (zh) | 2008-12-24 |
KR20080078062A (ko) | 2008-08-26 |
KR101229648B1 (ko) | 2013-02-04 |
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