IL83694A - Wideband adaptive array using the chirp transform - Google Patents

Wideband adaptive array using the chirp transform

Info

Publication number
IL83694A
IL83694A IL83694A IL8369487A IL83694A IL 83694 A IL83694 A IL 83694A IL 83694 A IL83694 A IL 83694A IL 8369487 A IL8369487 A IL 8369487A IL 83694 A IL83694 A IL 83694A
Authority
IL
Israel
Prior art keywords
adaptive array
wideband adaptive
chirp transform
chirp
transform
Prior art date
Application number
IL83694A
Other languages
English (en)
Original Assignee
Hughes Aircraft Co
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 Hughes Aircraft Co filed Critical Hughes Aircraft Co
Publication of IL83694A publication Critical patent/IL83694A/xx

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q3/00—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system
    • H01Q3/26—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the relative phase or relative amplitude of energisation between two or more active radiating elements; varying the distribution of energy across a radiating aperture
    • H01Q3/2605—Array of radiating elements provided with a feedback control over the element weights, e.g. adaptive arrays
    • H01Q3/2611—Means for null steering; Adaptive interference nulling
    • H01Q3/2629—Combination of a main antenna unit with an auxiliary antenna unit
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H21/00—Adaptive networks
    • H03H21/0012—Digital adaptive filters
    • H03H21/0025—Particular filtering methods
    • H03H21/0027—Particular filtering methods filtering in the frequency domain
IL83694A 1986-09-10 1987-08-31 Wideband adaptive array using the chirp transform IL83694A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US06/905,824 US4821037A (en) 1986-09-10 1986-09-10 Wideband adaptive array using the chirp transform

Publications (1)

Publication Number Publication Date
IL83694A true IL83694A (en) 1992-08-18

Family

ID=25421541

Family Applications (1)

Application Number Title Priority Date Filing Date
IL83694A IL83694A (en) 1986-09-10 1987-08-31 Wideband adaptive array using the chirp transform

Country Status (5)

Country Link
US (1) US4821037A (ja)
JP (1) JPS6370602A (ja)
CA (1) CA1288863C (ja)
GB (1) GB2195515B (ja)
IL (1) IL83694A (ja)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5105294A (en) * 1988-06-21 1992-04-14 Canon Kabushiki Kaisha Digital communicating method and apparatus
US5021793A (en) * 1989-10-18 1991-06-04 Unisys Corporation Phased array antenna method and system for adaptively positioning nulls
USH1331H (en) 1992-06-17 1994-07-05 The United States Of America As Represented By The Secretary Of The Army Wide bandwidth, high resolution circuitry for phase shifted frequency detection
US5481570A (en) * 1993-10-20 1996-01-02 At&T Corp. Block radio and adaptive arrays for wireless systems
US6336106B1 (en) * 1994-02-15 2002-01-01 R.R. Donnelley & Sons Company System and method for partitioning a real-valued attribute exhibiting windowed data characteristics
US5608514A (en) * 1995-04-19 1997-03-04 The United States Of America As Represented By The Secretary Of The Army High range resolution ladar
US6980614B2 (en) * 2002-01-14 2005-12-27 Raytheon Company System and method for subband beamforming using adaptive weight normalization
US6891497B2 (en) * 2003-06-25 2005-05-10 Harris Corporation Chirp-based method and apparatus for performing phase calibration across phased array antenna
US6861975B1 (en) * 2003-06-25 2005-03-01 Harris Corporation Chirp-based method and apparatus for performing distributed network phase calibration across phased array antenna

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4017859A (en) * 1975-12-22 1977-04-12 The United States Of America As Represented By The Secretary Of The Navy Multi-path signal enhancing apparatus
US4255791A (en) * 1978-12-04 1981-03-10 Harris Corporation Signal processing system
US4254417A (en) * 1979-08-20 1981-03-03 The United States Of America As Represented By The Secretary Of The Navy Beamformer for arrays with rotational symmetry
US4287475A (en) * 1979-10-05 1981-09-01 The United States Of America As Represented By The Secretary Of The Air Force Circuit for the adaptive suppression of narrow band interference
US4641143A (en) * 1983-09-28 1987-02-03 Sanders Associates, Inc. Two-dimensional acquisition system using circular array
NL8402559A (nl) * 1984-08-21 1986-03-17 Hollandse Signaalapparaten Bv Zijlus-'blanking' circuit.
US4654667A (en) * 1984-12-21 1987-03-31 Sanders Associates, Inc. Signal-acquisition system for a circular array

Also Published As

Publication number Publication date
JPS6370602A (ja) 1988-03-30
GB8720554D0 (en) 1987-10-07
GB2195515B (en) 1990-08-01
GB2195515A (en) 1988-04-07
US4821037A (en) 1989-04-11
CA1288863C (en) 1991-09-10
JPH0520706B2 (ja) 1993-03-22

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Legal Events

Date Code Title Description
KB Patent renewed
HC Change of name of proprietor(s)