GB2190221B - Signal transforming device - Google Patents

Signal transforming device

Info

Publication number
GB2190221B
GB2190221B GB8707301A GB8707301A GB2190221B GB 2190221 B GB2190221 B GB 2190221B GB 8707301 A GB8707301 A GB 8707301A GB 8707301 A GB8707301 A GB 8707301A GB 2190221 B GB2190221 B GB 2190221B
Authority
GB
United Kingdom
Prior art keywords
transforming device
signal transforming
signal
transforming
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 - Lifetime
Application number
GB8707301A
Other versions
GB8707301D0 (en
GB2190221A (en
Inventor
Stephen Piers Luttrel
Jonathan Alexander S Pritchard
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.)
UK Secretary of State for Defence
Original Assignee
UK Secretary of State for Defence
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 UK Secretary of State for Defence filed Critical UK Secretary of State for Defence
Publication of GB8707301D0 publication Critical patent/GB8707301D0/en
Publication of GB2190221A publication Critical patent/GB2190221A/en
Application granted granted Critical
Publication of GB2190221B publication Critical patent/GB2190221B/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H17/00—Networks using digital techniques
    • H03H17/02—Frequency selective networks
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Mathematical Physics (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Computational Mathematics (AREA)
  • Mathematical Analysis (AREA)
  • Mathematical Optimization (AREA)
  • Pure & Applied Mathematics (AREA)
  • Data Mining & Analysis (AREA)
  • Algebra (AREA)
  • Software Systems (AREA)
  • General Engineering & Computer Science (AREA)
  • Databases & Information Systems (AREA)
  • Computer Hardware Design (AREA)
  • Complex Calculations (AREA)
GB8707301A 1986-05-08 1987-03-26 Signal transforming device Expired - Lifetime GB2190221B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB868611180A GB8611180D0 (en) 1986-05-08 1986-05-08 Signal transforming device

Publications (3)

Publication Number Publication Date
GB8707301D0 GB8707301D0 (en) 1987-04-29
GB2190221A GB2190221A (en) 1987-11-11
GB2190221B true GB2190221B (en) 1990-05-02

Family

ID=10597489

Family Applications (2)

Application Number Title Priority Date Filing Date
GB868611180A Pending GB8611180D0 (en) 1986-05-08 1986-05-08 Signal transforming device
GB8707301A Expired - Lifetime GB2190221B (en) 1986-05-08 1987-03-26 Signal transforming device

Family Applications Before (1)

Application Number Title Priority Date Filing Date
GB868611180A Pending GB8611180D0 (en) 1986-05-08 1986-05-08 Signal transforming device

Country Status (1)

Country Link
GB (2) GB8611180D0 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB8826711D0 (en) * 1988-11-15 1988-12-21 Secr Defence Signal analysis device

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4023028A (en) * 1974-08-20 1977-05-10 The United States Of America As Represented By The Secretary Of The Navy Method and apparatus for computing the discrete Fourier transform recursively
GB1518501A (en) * 1975-08-13 1978-07-19 Nat Res Dev Apparatus for computing the discrete fourier transform
US4164021A (en) * 1976-10-06 1979-08-07 Nippon Electric Co., Ltd. 2M-point discrete Fourier transform calculator comprising a pre-processor for twice performing extraction of conjugate symmetric and/or antisymmetric components
GB1571702A (en) * 1976-07-12 1980-07-16 Philips Nv Digital signal processing arrangement
US4231103A (en) * 1979-02-12 1980-10-28 The United States Of America As Represented By The Secretary Of The Navy Fast Fourier transform spectral analysis system employing adaptive window
EP0046105A1 (en) * 1980-08-06 1982-02-17 Thomson-Csf Telephone Fast digital operator device
EP0080836A2 (en) * 1981-12-02 1983-06-08 Trw Inc. Monolithic discrete-time digital convolution circuit
EP0083967A2 (en) * 1982-01-11 1983-07-20 Trw Inc. Monolithic fast Fourier transform circuit

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4023028A (en) * 1974-08-20 1977-05-10 The United States Of America As Represented By The Secretary Of The Navy Method and apparatus for computing the discrete Fourier transform recursively
GB1518501A (en) * 1975-08-13 1978-07-19 Nat Res Dev Apparatus for computing the discrete fourier transform
GB1571702A (en) * 1976-07-12 1980-07-16 Philips Nv Digital signal processing arrangement
US4164021A (en) * 1976-10-06 1979-08-07 Nippon Electric Co., Ltd. 2M-point discrete Fourier transform calculator comprising a pre-processor for twice performing extraction of conjugate symmetric and/or antisymmetric components
US4231103A (en) * 1979-02-12 1980-10-28 The United States Of America As Represented By The Secretary Of The Navy Fast Fourier transform spectral analysis system employing adaptive window
EP0046105A1 (en) * 1980-08-06 1982-02-17 Thomson-Csf Telephone Fast digital operator device
EP0080836A2 (en) * 1981-12-02 1983-06-08 Trw Inc. Monolithic discrete-time digital convolution circuit
EP0083967A2 (en) * 1982-01-11 1983-07-20 Trw Inc. Monolithic fast Fourier transform circuit

Also Published As

Publication number Publication date
GB8611180D0 (en) 1986-06-18
GB8707301D0 (en) 1987-04-29
GB2190221A (en) 1987-11-11

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Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee

Effective date: 19960326