GB1405168A - Hiblert transformation system - Google Patents

Hiblert transformation system

Info

Publication number
GB1405168A
GB1405168A GB5425072A GB5425072A GB1405168A GB 1405168 A GB1405168 A GB 1405168A GB 5425072 A GB5425072 A GB 5425072A GB 5425072 A GB5425072 A GB 5425072A GB 1405168 A GB1405168 A GB 1405168A
Authority
GB
United Kingdom
Prior art keywords
filters
signal
signals
input
frequency
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
Application number
GB5425072A
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.)
Boeing North American Inc
Original Assignee
Rockwell International Corp
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 Rockwell International Corp filed Critical Rockwell International Corp
Publication of GB1405168A publication Critical patent/GB1405168A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR 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
    • G06G7/19—Arrangements for performing computing operations, e.g. operational amplifiers for forming integrals of products, e.g. Fourier integrals, Laplace integrals, correlation integrals; for analysis or synthesis of functions using orthogonal functions
    • G06G7/1942—Arrangements for performing computing operations, e.g. operational amplifiers for forming integrals of products, e.g. Fourier integrals, Laplace integrals, correlation integrals; for analysis or synthesis of functions using orthogonal functions for forming other integrals of product, e.g. orthogonal functions, Laplace, Laguerre, Walsh, Hadamard, Hilbert
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H17/00—Networks using digital techniques
    • H03H17/02—Frequency selective networks
    • H03H17/0211—Frequency selective networks using specific transformation algorithms, e.g. WALSH functions, Fermat transforms, Mersenne transforms, polynomial transforms, Hilbert transforms

Landscapes

  • Physics & Mathematics (AREA)
  • Mathematical Physics (AREA)
  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Computer Hardware Design (AREA)
  • General Physics & Mathematics (AREA)
  • Software Systems (AREA)
  • Algebra (AREA)
  • Computing Systems (AREA)
  • Mathematical Analysis (AREA)
  • Mathematical Optimization (AREA)
  • Pure & Applied Mathematics (AREA)
  • Amplitude Modulation (AREA)
  • Networks Using Active Elements (AREA)
  • Complex Calculations (AREA)

Abstract

1405168 Active filters ROCKWELL INTERNATIONAL CORP 23 Nov 1972 [27 March 1972] 54250/72 Heading H3U A Hilbert transformation arrangement for transforming an input signal x(t) and providing the transformed signal as in-phase and quadrature components Y 1 (j#), Y 2 (j#) comprises: a first channel 11 including indentical filters H(j#) for transforming the input signal, multipliers 27, 28 for shifting the signals through the filters up and down in frequency respectively by the same amounts # 5 , and means 29 for adding the two shifted signals to provide the in-phase signal; and a second channel 12 comprising similar filters, multipliers 19a, 20a which also produce a 90 degree phase shift, and a difference circuit 21 to provide the quadrature signal. As described ,the filters H(j#) are lowpass filters, and the input signals are first shifted down in frequency by input frequency changers 25, 26, 15a, 16a. The lowpass filters may be simple LC sections or their digital equivalent, Fig. 5 (not shown).
GB5425072A 1972-03-27 1972-11-23 Hiblert transformation system Expired GB1405168A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US00238213A US3800131A (en) 1972-03-27 1972-03-27 Hilbert transformer

Publications (1)

Publication Number Publication Date
GB1405168A true GB1405168A (en) 1975-09-03

Family

ID=22896948

Family Applications (1)

Application Number Title Priority Date Filing Date
GB5425072A Expired GB1405168A (en) 1972-03-27 1972-11-23 Hiblert transformation system

Country Status (6)

Country Link
US (1) US3800131A (en)
JP (1) JPS4915339A (en)
CA (1) CA979078A (en)
DE (1) DE2302298C3 (en)
FR (1) FR2177725A1 (en)
GB (1) GB1405168A (en)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3908114A (en) * 1974-08-12 1975-09-23 Rockwell International Corp Digital Hilbert transformation system
US4287418A (en) * 1978-07-06 1981-09-01 Divin Jury Y Method for measuring the spectral distribution of electromagnetic radiation intensity and spectrometer of millimetric and far-infrared ranges for effecting same
US4509135A (en) * 1980-07-02 1985-04-02 Motorola, Inc. Cosine signal correction circuit
US4462114A (en) * 1980-07-02 1984-07-24 Motorola, Inc. Signum signal generator
US4525862A (en) * 1980-07-02 1985-06-25 Motorola, Inc. Transform modulation system
DE3585502D1 (en) * 1984-12-10 1992-04-09 Nippon Telegraph & Telephone SINGLE-SIDED TAPE TRANSFER SYSTEM.
JPH0258410A (en) * 1988-08-24 1990-02-27 Hitachi Ltd Method and device for processing signal
DE3830729C2 (en) * 1988-09-09 1998-04-09 Hagenuk Marinekommunikation Gm Method for generating a single sideband signal and circuit arrangement for carrying out the method
DE4210069A1 (en) * 1992-03-27 1993-09-30 Asea Brown Boveri Amplitude-modulated radio transmitter for various types of modulation, especially DSB, SSB and ISB

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2020409A (en) * 1933-08-15 1935-11-12 American Telephone & Telegraph Band separation system
US2605396A (en) * 1949-01-21 1952-07-29 Westinghouse Electric Corp Frequency selective device
GB913089A (en) * 1960-10-26 1962-12-19 Communications Patents Ltd Improvements in or relating to multi-channel electric wave signalling systems
US3548210A (en) * 1965-08-30 1970-12-15 Bendix Corp Automatic stereoplotter
GB1220831A (en) * 1967-04-25 1971-01-27 Textron Inc Shock spectrum analyzer
US3621388A (en) * 1968-11-04 1971-11-16 Spectral Dynamics Corp Electronic wave analyzer for determining the frequency and amplitude of components in a complex waveform
US3585529A (en) * 1968-11-18 1971-06-15 Bell Telephone Labor Inc Single-sideband modulator

Also Published As

Publication number Publication date
FR2177725A1 (en) 1973-11-09
DE2302298B2 (en) 1974-03-28
US3800131A (en) 1974-03-26
DE2302298C3 (en) 1974-10-24
CA979078A (en) 1975-12-02
JPS4915339A (en) 1974-02-09
DE2302298A1 (en) 1973-10-11

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PCNP Patent ceased through non-payment of renewal fee