WO2000051246A3 - System and method for detecting signals across radar and communications bands - Google Patents

System and method for detecting signals across radar and communications bands Download PDF

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Publication number
WO2000051246A3
WO2000051246A3 PCT/US1999/029021 US9929021W WO0051246A3 WO 2000051246 A3 WO2000051246 A3 WO 2000051246A3 US 9929021 W US9929021 W US 9929021W WO 0051246 A3 WO0051246 A3 WO 0051246A3
Authority
WO
WIPO (PCT)
Prior art keywords
frequency
energy
samples
present
signal
Prior art date
Application number
PCT/US1999/029021
Other languages
French (fr)
Other versions
WO2000051246A2 (en
Inventor
Joseph F Springer
Conrad H Haber
Original Assignee
L 3 Comm 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 L 3 Comm Corp filed Critical L 3 Comm Corp
Priority to AU55854/00A priority Critical patent/AU5585400A/en
Priority to JP2000601747A priority patent/JP2002538442A/en
Priority to EP99973639A priority patent/EP1141743A4/en
Publication of WO2000051246A2 publication Critical patent/WO2000051246A2/en
Publication of WO2000051246A3 publication Critical patent/WO2000051246A3/en

Links

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
    • G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
    • G01S7/02—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S13/00
    • G01S7/28—Details of pulse systems
    • G01S7/285—Receivers
    • G01S7/295—Means for transforming co-ordinates or for evaluating data, e.g. using computers
    • 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
    • G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
    • G01S7/02—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S13/00
    • G01S7/021—Auxiliary means for detecting or identifying radar signals or the like, e.g. radar jamming signals
    • 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
    • G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
    • G01S7/02—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S13/00
    • G01S7/28—Details of pulse systems
    • G01S7/285—Receivers
    • 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
    • G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
    • G01S7/02—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S13/00
    • G01S7/28—Details of pulse systems
    • G01S7/285—Receivers
    • G01S7/288—Coherent receivers
    • 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
    • G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
    • G01S7/02—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S13/00
    • G01S7/28—Details of pulse systems
    • G01S7/285—Receivers
    • G01S7/292—Extracting wanted echo-signals
    • 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
    • G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
    • G01S7/02—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S13/00
    • G01S7/28—Details of pulse systems
    • G01S7/285—Receivers
    • G01S7/288—Coherent receivers
    • G01S7/2883—Coherent receivers using FFT processing

Abstract

Apparatus and methods for processing RF signals are disclosed. A method according to the invention includes receiving a set of time domain energy samples representing signal energy present in an RF spectrum, transforming the set of time domain energy samples into a set of frequency domain power samples (106), determining from the set of frequency domain power samples whether a signal of interest is present in the RF spectrum, and forwarding to a follow on system a subset of the set of frequency domain power samples, wherein the subset corresponds to the signal of interest. Transforming the time domain samples can include dividing the set of time domain energy samples into a plurality of N windows (106), each of which is associated with a predefined window period, and performing an FFT on each said window to generate a set of K frequency bins, wherein each frequency bin has a value based on energy present in a predefined band during the corresponding window period. Determining whether the signal is present can include generating an energy map that represents energy present in the RF spectrum as a function of frequency and time. The energy map can be a bitmap having NxK frequency cells, wherein each frequency cell has a binary value based on the value of a corresponding frequency bin. The binary value can be based on whether the value of the corresponding frequency bin exceeds a predefined threshold (108).
PCT/US1999/029021 1998-12-09 1999-12-08 System and method for detecting signals across radar and communications bands WO2000051246A2 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
AU55854/00A AU5585400A (en) 1998-12-09 1999-12-08 System and method for detecting signals across radar and communications bands
JP2000601747A JP2002538442A (en) 1998-12-09 1999-12-08 System and method for detecting radar and communication band signals
EP99973639A EP1141743A4 (en) 1998-12-09 1999-12-08 System and method for detecting signals across radar and communications bands

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
US11156098P 1998-12-09 1998-12-09
US11155898P 1998-12-09 1998-12-09
US60/111,558 1998-12-09
US60/111,560 1998-12-09

Publications (2)

Publication Number Publication Date
WO2000051246A2 WO2000051246A2 (en) 2000-08-31
WO2000051246A3 true WO2000051246A3 (en) 2000-11-23

Family

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Family Applications (2)

Application Number Title Priority Date Filing Date
PCT/US1999/029021 WO2000051246A2 (en) 1998-12-09 1999-12-08 System and method for detecting signals across radar and communications bands
PCT/US1999/029022 WO2000034801A1 (en) 1998-12-09 1999-12-08 System and method for limiting histograms

Family Applications After (1)

Application Number Title Priority Date Filing Date
PCT/US1999/029022 WO2000034801A1 (en) 1998-12-09 1999-12-08 System and method for limiting histograms

Country Status (5)

Country Link
US (3) US6275183B1 (en)
EP (2) EP1141743A4 (en)
JP (2) JP2002538442A (en)
AU (2) AU1843000A (en)
WO (2) WO2000051246A2 (en)

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US7193555B2 (en) * 2005-03-31 2007-03-20 Lockheed Martin Corporation System and method for detecting emitter signals in the presence of unwanted signals
US8354917B2 (en) * 2007-02-21 2013-01-15 Impinj, Inc. RFID tag chips and tags complying with only a limited number of remaining commands and methods
US8022864B2 (en) * 2007-11-08 2011-09-20 The United States Of America As Represented By The Secretary Of Commerce Detection of transient signals in doppler spectra
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US8484274B2 (en) * 2009-08-27 2013-07-09 The United States of America represented by the Administrator of the National Aeronautics Space Administration Optimal padding for the two-dimensional fast fourier transform
US8238924B2 (en) 2010-04-30 2012-08-07 The United States Of America As Represented By The Secretary Of The Navy Real-time optimization of allocation of resources
US8831155B2 (en) 2011-12-29 2014-09-09 Qualcomm Incorporated Radar detection method and system using low-resolution FFTS
US9250314B2 (en) * 2013-03-08 2016-02-02 Qualcomm Incorporated Enhanced radar detection for communication networks
US20140315506A1 (en) * 2013-04-18 2014-10-23 Qualcomm Incorporated Determining radar sub-channel in communication networks
CN105158735B (en) * 2015-06-03 2017-06-16 西安电子科技大学 Null tone Two-Dimensional Spectral Estimation method based on compression sampling array
US9429642B1 (en) * 2015-08-21 2016-08-30 Qualcomm Incorporated Radar detection for adjacent segments in wireless communications
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Also Published As

Publication number Publication date
EP1141743A4 (en) 2002-11-27
AU1843000A (en) 2000-06-26
AU5585400A (en) 2000-09-14
EP1135697A4 (en) 2002-10-25
EP1135697A1 (en) 2001-09-26
WO2000034801A1 (en) 2000-06-15
EP1141743A2 (en) 2001-10-10
US6271787B1 (en) 2001-08-07
US6275183B1 (en) 2001-08-14
JP2002538442A (en) 2002-11-12
JP2002532692A (en) 2002-10-02
US6191727B1 (en) 2001-02-20
WO2000051246A2 (en) 2000-08-31

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