GB2006485A - Improvements in or relating to Spectrum Analysers - Google Patents

Improvements in or relating to Spectrum Analysers

Info

Publication number
GB2006485A
GB2006485A GB7838179A GB7838179A GB2006485A GB 2006485 A GB2006485 A GB 2006485A GB 7838179 A GB7838179 A GB 7838179A GB 7838179 A GB7838179 A GB 7838179A GB 2006485 A GB2006485 A GB 2006485A
Authority
GB
United Kingdom
Prior art keywords
weighting coefficients
frequencies
series
signal samples
frequency components
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.)
Granted
Application number
GB7838179A
Other versions
GB2006485B (en
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
Priority to GB7838179A priority Critical patent/GB2006485B/en
Publication of GB2006485A publication Critical patent/GB2006485A/en
Application granted granted Critical
Publication of GB2006485B publication Critical patent/GB2006485B/en
Expired legal-status Critical Current

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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

Abstract

A spectrum analyser operating according to the fast Fourier transform (FFT) algorithm comprises a first memory means (2) for receiving series of input signal samples, a second memory means (3) containing weighting coefficients, arithmetical processing means (6), and control means (1) for applying the signal samples and weighting coefficients to the arithmetical processing means (6) to derive, by a process of successive intercalation, coefficients appropriate to express the series of input samples as a sum of frequency components having equispaced frequencies, wherein the weighting coefficients applied by the control means (1) are such that the frequencies of the frequency components are displaced from integral multiples of the frequency spacing by one quarter of the frequency spacing. <IMAGE>
GB7838179A 1977-10-07 1978-09-26 Spectrum analysers Expired GB2006485B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB7838179A GB2006485B (en) 1977-10-07 1978-09-26 Spectrum analysers

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB4180977 1977-10-07
GB7838179A GB2006485B (en) 1977-10-07 1978-09-26 Spectrum analysers

Publications (2)

Publication Number Publication Date
GB2006485A true GB2006485A (en) 1979-05-02
GB2006485B GB2006485B (en) 1982-02-10

Family

ID=26264753

Family Applications (1)

Application Number Title Priority Date Filing Date
GB7838179A Expired GB2006485B (en) 1977-10-07 1978-09-26 Spectrum analysers

Country Status (1)

Country Link
GB (1) GB2006485B (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3416536A1 (en) * 1983-05-04 1984-11-08 Victor Company Of Japan, Ltd., Yokohama, Kanagawa COMPUTING DEVICE FOR FAST FOURIER TRANSFORMATION
DE3343912A1 (en) * 1983-12-05 1985-06-13 Detlef 4300 Essen Leseberg Synthetic production of rainbow holograms
US4547862A (en) * 1982-01-11 1985-10-15 Trw Inc. Monolithic fast fourier transform circuit
GB2189631A (en) * 1986-04-23 1987-10-28 Stc Plc R f spectrum analysing receiver
WO1998018083A1 (en) * 1996-10-21 1998-04-30 Telefonaktiebolaget Lm Ericsson (Publ) A device and method for calculating fft

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4547862A (en) * 1982-01-11 1985-10-15 Trw Inc. Monolithic fast fourier transform circuit
DE3416536A1 (en) * 1983-05-04 1984-11-08 Victor Company Of Japan, Ltd., Yokohama, Kanagawa COMPUTING DEVICE FOR FAST FOURIER TRANSFORMATION
DE3343912A1 (en) * 1983-12-05 1985-06-13 Detlef 4300 Essen Leseberg Synthetic production of rainbow holograms
GB2189631A (en) * 1986-04-23 1987-10-28 Stc Plc R f spectrum analysing receiver
WO1998018083A1 (en) * 1996-10-21 1998-04-30 Telefonaktiebolaget Lm Ericsson (Publ) A device and method for calculating fft

Also Published As

Publication number Publication date
GB2006485B (en) 1982-02-10

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Legal Events

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