NL7205569A - - Google Patents
Info
- Publication number
- NL7205569A NL7205569A NL7205569A NL7205569A NL7205569A NL 7205569 A NL7205569 A NL 7205569A NL 7205569 A NL7205569 A NL 7205569A NL 7205569 A NL7205569 A NL 7205569A NL 7205569 A NL7205569 A NL 7205569A
- Authority
- NL
- Netherlands
Links
Classifications
-
- G—PHYSICS
- G06—COMPUTING OR CALCULATING; COUNTING
- G06G—ANALOGUE COMPUTERS
- G06G7/00—Devices in which the computing operation is performed by varying electric or magnetic quantities
- G06G7/12—Arrangements for performing computing operations, e.g. operational amplifiers specially adapted therefor
- G06G7/19—Arrangements for performing computing operations, e.g. operational amplifiers specially adapted therefor for forming integrals of products, e.g. Fourier integrals, Laplace integrals or correlation integrals; for analysis or synthesis of functions using orthogonal functions
- G06G7/1928—Arrangements for performing computing operations, e.g. operational amplifiers specially adapted therefor for forming integrals of products, e.g. Fourier integrals, Laplace integrals or correlation integrals; for analysis or synthesis of functions using orthogonal functions for forming correlation integrals; for forming convolution integrals
-
- G—PHYSICS
- G06—COMPUTING OR CALCULATING; 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
-
- G—PHYSICS
- G06—COMPUTING OR CALCULATING; COUNTING
- G06G—ANALOGUE COMPUTERS
- G06G7/00—Devices in which the computing operation is performed by varying electric or magnetic quantities
- G06G7/12—Arrangements for performing computing operations, e.g. operational amplifiers specially adapted therefor
- G06G7/19—Arrangements for performing computing operations, e.g. operational amplifiers specially adapted therefor for forming integrals of products, e.g. Fourier integrals, Laplace integrals or correlation integrals; for analysis or synthesis of functions using orthogonal functions
- G06G7/1921—Arrangements for performing computing operations, e.g. operational amplifiers specially adapted therefor for forming integrals of products, e.g. Fourier integrals, Laplace integrals or correlation integrals; for analysis or synthesis of functions using orthogonal functions for forming Fourier integrals, harmonic analysis and synthesis
Landscapes
- Physics & Mathematics (AREA)
- Mathematical Physics (AREA)
- Engineering & Computer Science (AREA)
- Theoretical Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Software Systems (AREA)
- Computational Mathematics (AREA)
- Computer Hardware Design (AREA)
- Mathematical Analysis (AREA)
- Mathematical Optimization (AREA)
- Pure & Applied Mathematics (AREA)
- Data Mining & Analysis (AREA)
- Discrete Mathematics (AREA)
- Algebra (AREA)
- Databases & Information Systems (AREA)
- General Engineering & Computer Science (AREA)
- Complex Calculations (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR717114988A FR2147770B1 (https=) | 1971-04-27 | 1971-04-27 |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| NL7205569A true NL7205569A (https=) | 1972-10-31 |
| NL176500B NL176500B (nl) | 1984-11-16 |
| NL176500C NL176500C (nl) | 1985-04-16 |
Family
ID=9076009
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NLAANVRAGE7205569,A NL176500C (nl) | 1971-04-27 | 1972-04-25 | Inrichting voor het berekenen van de discrete fourier-getransformeerde van een signaal. |
Country Status (8)
| Country | Link |
|---|---|
| US (1) | US3803391A (https=) |
| BE (1) | BE782711A (https=) |
| DE (1) | DE2220784C2 (https=) |
| FR (1) | FR2147770B1 (https=) |
| GB (1) | GB1397103A (https=) |
| IT (1) | IT957656B (https=) |
| NL (1) | NL176500C (https=) |
| SE (1) | SE385249B (https=) |
Families Citing this family (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3920978A (en) * | 1974-02-25 | 1975-11-18 | Sanders Associates Inc | Spectrum analyzer |
| US3926367A (en) * | 1974-09-27 | 1975-12-16 | Us Navy | Complex filters, convolvers, and multipliers |
| FR2303326A1 (fr) * | 1975-03-05 | 1976-10-01 | Trt Telecom Radio Electr | Dispositif de calcul de transformee de fourier discrete |
| FR2308143A1 (fr) * | 1975-04-16 | 1976-11-12 | Ibm France | Dispositif generateur de fonction de convolution discrete et filtre numerique incorporant ledit dispositif |
| US3971927A (en) * | 1975-11-03 | 1976-07-27 | The United States Of America As Represented By The Secretary Of The Navy | Modular discrete cosine transform system |
| JPS597990B2 (ja) * | 1976-10-06 | 1984-02-22 | 日本電気株式会社 | Ｎ点離散的フ−リエ変換演算装置 |
| JPS5955523A (ja) * | 1982-09-24 | 1984-03-30 | Advantest Corp | デジタルスペクトルアナライザ用信号発生器 |
| US4612626A (en) * | 1983-12-27 | 1986-09-16 | Motorola Inc. | Method of performing real input fast fourier transforms simultaneously on two data streams |
| US4689762A (en) * | 1984-09-10 | 1987-08-25 | Sanders Associates, Inc. | Dynamically configurable fast Fourier transform butterfly circuit |
| US4698769A (en) * | 1985-02-04 | 1987-10-06 | American Telephone And Telegraph Company | Supervisory audio tone detection in a radio channel |
| US4764974A (en) * | 1986-09-22 | 1988-08-16 | Perceptics Corporation | Apparatus and method for processing an image |
| US5594655A (en) * | 1993-08-20 | 1997-01-14 | Nicolet Instrument Corporation | Method and apparatus for frequency triggering in digital oscilloscopes and the like |
| US6169723B1 (en) | 1997-07-02 | 2001-01-02 | Telefonaktiebolaget Lm Ericsson | Computationally efficient analysis and synthesis of real signals using discrete fourier transforms and inverse discrete fourier transforms |
| US5987005A (en) * | 1997-07-02 | 1999-11-16 | Telefonaktiebolaget Lm Ericsson | Method and apparatus for efficient computation of discrete fourier transform (DFT) and inverse discrete fourier transform |
| US6023719A (en) * | 1997-09-04 | 2000-02-08 | Motorola, Inc. | Signal processor and method for fast Fourier transformation |
| US7203717B1 (en) | 1999-10-30 | 2007-04-10 | Stmicroelectronics Asia Pacific Pte. Ltd. | Fast modified discrete cosine transform method |
| FR2815723B1 (fr) * | 2000-10-24 | 2004-04-30 | Thomson Csf | Procede systeme et sonde pour l'obtention d'images par l'intermediaire d'ondes emises par une antenne apres reflexion de ces ondes au niveau d'un ensemble servant de cible |
| KR100836050B1 (ko) * | 2001-05-23 | 2008-06-09 | 엘지전자 주식회사 | 고속 푸리에 변환 연산 장치 |
-
1971
- 1971-04-27 FR FR717114988A patent/FR2147770B1/fr not_active Expired
-
1972
- 1972-04-25 US US00247476A patent/US3803391A/en not_active Expired - Lifetime
- 1972-04-25 NL NLAANVRAGE7205569,A patent/NL176500C/xx not_active IP Right Cessation
- 1972-04-26 IT IT49840/72A patent/IT957656B/it active
- 1972-04-26 GB GB1949172A patent/GB1397103A/en not_active Expired
- 1972-04-26 SE SE7205514A patent/SE385249B/xx unknown
- 1972-04-27 BE BE782711A patent/BE782711A/xx not_active IP Right Cessation
- 1972-04-27 DE DE2220784A patent/DE2220784C2/de not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| DE2220784A1 (de) | 1972-11-09 |
| DE2220784C2 (de) | 1983-03-03 |
| BE782711A (fr) | 1972-08-16 |
| US3803391A (en) | 1974-04-09 |
| FR2147770A1 (https=) | 1973-03-11 |
| NL176500B (nl) | 1984-11-16 |
| GB1397103A (en) | 1975-06-11 |
| FR2147770B1 (https=) | 1974-06-21 |
| SE385249B (sv) | 1976-06-14 |
| IT957656B (it) | 1973-10-20 |
| NL176500C (nl) | 1985-04-16 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| BB | A search report has been drawn up | ||
| BC | A request for examination has been filed | ||
| A85 | Still pending on 85-01-01 | ||
| V1 | Lapsed because of non-payment of the annual fee |