AU3418589A – Method for processing transmitted and reflected signals for removing unwanted signals and noise from wanted signals
– Google Patents
AU3418589A – Method for processing transmitted and reflected signals for removing unwanted signals and noise from wanted signals
– Google Patents
Method for processing transmitted and reflected signals for removing unwanted signals and noise from wanted signals
Info
Publication number
AU3418589A
AU3418589A
AU34185/89A
AU3418589A
AU3418589A
AU 3418589 A
AU3418589 A
AU 3418589A
AU 34185/89 A
AU34185/89 A
AU 34185/89A
AU 3418589 A
AU3418589 A
AU 3418589A
AU 3418589 A
AU3418589 A
AU 3418589A
Authority
AU
Australia
Prior art keywords
signals
reflected
noise
signal
receiver
Prior art date
1988-10-27
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
AU34185/89A
Other versions
AU625991B2
(en
Inventor
Steffen Kirknes
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.)
Q Free ASA
Original Assignee
Micro Design AS
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.)
1988-10-27
Filing date
1989-04-24
Publication date
1990-05-14
1989-04-24
Application filed by Micro Design AS
filed
Critical
Micro Design AS
1990-05-14
Publication of AU3418589A
publication
Critical
patent/AU3418589A/en
1992-07-23
Application granted
granted
Critical
1992-07-23
Publication of AU625991B2
publication
Critical
patent/AU625991B2/en
1999-05-06
Assigned to Q-FREE ASA
reassignment
Q-FREE ASA
Request to Amend Deed and Register
Assignors: MICRO DESIGN AS
2009-04-24
Anticipated expiration
legal-status
Critical
Status
Ceased
legal-status
Critical
Current
Links
Espacenet
Global Dossier
Discuss
Classifications
G—PHYSICS
G01—MEASURING; TESTING
G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
G01S13/00—Systems using the reflection or reradiation of radio waves, e.g. radar systems; Analogous systems using reflection or reradiation of waves whose nature or wavelength is irrelevant or unspecified
G01S13/74—Systems using reradiation of radio waves, e.g. secondary radar systems; Analogous systems
G01S13/79—Systems using random coded signals or random pulse repetition frequencies, e.g. «Separation and Control of Aircraft using Non synchronous Techniques» [SECANT]
Abstract
In an identification system based on reflection of radar signals from a bit-coded transponder, the received signals are processed to remove unwanted signals and noise from the required, reflected and received signals that have a recurrent cycle. The reflected signals are extremely weak in relation to the unwanted signals and noise. A random bit sequencer and a time slot generator are used to generate a single phase modulated pulse train which is transmitted by an RF transmitter. The pulse train signal is received and reflected from a coded passive transponder back to a comparable receiver. The receiver demodulates the incoming reflected signal and directs the demodulated signal to an integrator array. An inverted signal from the receiver is also utilized. Synchronization of the transmitted and received signals is performed through a shift register while the bit sequencer controls a second integrator array. In this way, the unwanted signals and noise associated with the low power reflected signal is substantially eliminated.
AU34185/89A
1988-10-27
1989-04-24
Method for processing transmitted and reflected signals for removing unwanted signals and noise from wanted signals
Ceased
AU625991B2
(en)
Applications Claiming Priority (2)
Application Number
Priority Date
Filing Date
Title
NO884784A
NO169983C
(en)
1988-10-27
1988-10-27
PROCEDURE AND DEVICE FOR INDIVIDUAL IDENTIFICATION
NO884784
1988-10-27
Publications (2)
Publication Number
Publication Date
AU3418589A
true
AU3418589A
(en)
1990-05-14
AU625991B2
AU625991B2
(en)
1992-07-23
Family
ID=19891368
Family Applications (1)
Application Number
Title
Priority Date
Filing Date
AU34185/89A
Ceased
AU625991B2
(en)
1988-10-27
1989-04-24
Method for processing transmitted and reflected signals for removing unwanted signals and noise from wanted signals
Country Status (12)
Country
Link
US
(1)
US5144313A
(en)
EP
(1)
EP0440624B1
(en)
JP
(1)
JPH04502059A
(en)
AT
(1)
ATE133496T1
(en)
AU
(1)
AU625991B2
(en)
CA
(1)
CA1337829C
(en)
DE
(1)
DE58909583D1
(en)
DK
(1)
DK74891A
(en)
ES
(1)
ES2016047A6
(en)
FI
(1)
FI102418B
(en)
NO
(1)
NO169983C
(en)
WO
(1)
WO1990004794A1
(en)
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1992-05-12
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Unisys Corporation
Covert electronic battlefield identification system
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1992-12-15
1996-03-19
Micron Technology, Inc.
Data communication method using identification protocol
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1992-12-15
1994-11-15
Micron Technology, Inc.
Data communication transceiver using identification protocol
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1992-08-12
2007-01-02
Micron Technology, Inc.
Thin, flexible, RFID label and system for use
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1992-08-26
2004-11-23
British Technology Group Ltd.
Synchronised electronic identification system
US20050040961A1
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1995-04-11
2005-02-24
Tuttle John R.
RF identification system with restricted range
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1996-04-04
2000-08-01
Micron Communications, Inc.
RF identification system with restricted range
US5349355A
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1993-01-21
1994-09-20
The United States Of America As Represented By The Secretary Of The Navy
Credential tracking system
US6150921A
(en)
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1996-10-17
2000-11-21
Pinpoint Corporation
Article tracking system
US6812824B1
(en)
1996-10-17
2004-11-02
Rf Technologies, Inc.
Method and apparatus combining a tracking system and a wireless communication system
US6107910A
(en)
1996-11-29
2000-08-22
X-Cyte, Inc.
Dual mode transmitter/receiver and decoder for RF transponder tags
US6114971A
(en)
1997-08-18
2000-09-05
X-Cyte, Inc.
Frequency hopping spread spectrum passive acoustic wave identification device
US5986382A
(en)
1997-08-18
1999-11-16
X-Cyte, Inc.
Surface acoustic wave transponder configuration
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(en)
*
1997-08-18
2001-03-27
X-Cyte, Inc.
Surface acoustic wave transponder configuration
US6060815A
(en)
1997-08-18
2000-05-09
X-Cyte, Inc.
Frequency mixing passive transponder
US6339385B1
(en)
1997-08-20
2002-01-15
Micron Technology, Inc.
Electronic communication devices, methods of forming electrical communication devices, and communication methods
US6118789A
(en)
1998-02-19
2000-09-12
Micron Technology, Inc.
Method of addressing messages and communications system
USRE43382E1
(en)
1998-02-19
2012-05-15
Round Rock Research, Llc
Method of addressing messages and communications systems
US6072801A
(en)
1998-02-19
2000-06-06
Micron Technology, Inc.
Method of addressing messages, method of establishing wireless communications, and communications system
US6275476B1
(en)
1998-02-19
2001-08-14
Micron Technology, Inc.
Method of addressing messages and communications system
US6061344A
(en)
1998-02-19
2000-05-09
Micron Technology, Inc.
Method of addressing messages and communications system
US6714121B1
(en)
*
1999-08-09
2004-03-30
Micron Technology, Inc.
RFID material tracking method and apparatus
US7054348B2
(en)
*
2001-11-15
2006-05-30
Koninklijke Philips Electronic N.V.
Using real random number generator as proof of time
US7420458B1
(en)
2004-01-20
2008-09-02
Charles A. Eldering
Secondary card reader
US7298264B1
(en)
2004-01-20
2007-11-20
Charles A. Eldering
RFID tag filtering and monitoring
US20080109502A1
(en)
*
2004-09-30
2008-05-08
Benjamin Aaron Gittins
Method And Apparatus For Partitioning Of A Bitstream
US7973644B2
(en)
2007-01-30
2011-07-05
Round Rock Research, Llc
Systems and methods for RFID tag arbitration where RFID tags generate multiple random numbers for different arbitration sessions
US20080212303A1
(en)
*
2007-03-02
2008-09-04
Warren Farnworth
Device for reducing or preventing exchange of information
US8134452B2
(en)
*
2007-05-30
2012-03-13
Round Rock Research, Llc
Methods and systems of receiving data payload of RFID tags
WO2012055148A1
(en)
*
2010-10-27
2012-05-03
中国人民解放军第四军医大学
Multichannel ultra wide band based (uwb-based) radar life detector and positioning method thereof
US8576114B2
(en)
*
2011-06-24
2013-11-05
Thales Canada Inc.
Location of a transponder center point
CN112098927B
(en)
*
2020-08-19
2022-06-21
中国电子科技集团公司第二十九研究所
Multi-channel direction finding method based on signal synthesis
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Assignee
Title
US3663935A
(en)
*
1967-06-05
1972-05-16
Hughes Aircraft Co
Pulse compression code sequencing system
US3691557A
(en)
*
1969-09-22
1972-09-12
James Nickolas Constant
System for identifying objects using an encoding array for each object
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(en)
*
1970-02-26
1972-12-12
Peter Harold Cole
Electronic surveillance system
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(en)
*
1973-10-23
1978-08-04
Sercel Rech Const Elect
GB1605271A
(en)
*
1975-04-03
1987-06-10
Secr Defence
Radio signalling equipment
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(en)
*
1975-05-21
1977-03-29
The United States Of America As Represented By The Secretary Of The Army
Method and apparatus for interrogating and identifying fixed or moving targets
US4725841A
(en)
*
1983-06-30
1988-02-16
X-Cyte, Inc.
System for interrogating a passive transponder carrying phase-encoded information
1988
1988-10-27
NO
NO884784A
patent/NO169983C/en
not_active
IP Right Cessation
1989
1989-04-24
WO
PCT/NO1989/000034
patent/WO1990004794A1/en
active
IP Right Grant
1989-04-24
AT
AT89904622T
patent/ATE133496T1/en
not_active
IP Right Cessation
1989-04-24
JP
JP1504213A
patent/JPH04502059A/en
active
Pending
1989-04-24
EP
EP89904622A
patent/EP0440624B1/en
not_active
Expired – Lifetime
1989-04-24
AU
AU34185/89A
patent/AU625991B2/en
not_active
Ceased
1989-04-24
DE
DE58909583T
patent/DE58909583D1/en
not_active
Expired – Fee Related
1989-06-15
CA
CA000602914A
patent/CA1337829C/en
not_active
Expired – Lifetime
1989-07-27
ES
ES8902660A
patent/ES2016047A6/en
not_active
Expired – Fee Related
1991
1991-04-23
DK
DK074891A
patent/DK74891A/en
not_active
Application Discontinuation
1991-04-24
US
US07/690,498
patent/US5144313A/en
not_active
Expired – Lifetime
1991-04-29
FI
FI912068A
patent/FI102418B/en
not_active
IP Right Cessation
Also Published As
Publication number
Publication date
EP0440624B1
(en)
1996-01-24
AU625991B2
(en)
1992-07-23
NO884784L
(en)
1990-04-30
NO169983B
(en)
1992-05-18
US5144313A
(en)
1992-09-01
WO1990004794A1
(en)
1990-05-03
ATE133496T1
(en)
1996-02-15
ES2016047A6
(en)
1990-10-01
NO884784D0
(en)
1988-10-27
DK74891D0
(en)
1991-04-23
EP0440624A1
(en)
1991-08-14
JPH04502059A
(en)
1992-04-09
FI102418B1
(en)
1998-11-30
DE58909583D1
(en)
1996-03-07
CA1337829C
(en)
1995-12-26
DK74891A
(en)
1991-06-25
FI912068A0
(en)
1991-04-29
NO169983C
(en)
1992-08-26
FI102418B
(en)
1998-11-30
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