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公开(公告)号：US20180364346A1
公开(公告)日：2018-12-20
申请号：US16062663
申请日：2016-12-16
申请人： SUEZ GROUPE
发明人： Guillaume SICOT , Nicolas THOMAS
摘要： A method for spectral estimation of the clutter of a haline liquid medium received by an oceanographic radar, such as a lake, a river, a sea or an ocean, from an array of antennas including at least three antennas. The method includes forming at least two sub-arrays of antennas from the array of antennas, each of the sub-arrays including at least one antenna less than the array of antennas, calculating a beam in one direction for each sub-array of antennas, locating in azimuth all the sources included in the beam from data of the beam coming from each of the sub-arrays, estimating the energy of each of the located sources, selecting a source, referred to as preferred source, among a plurality of sources according to a predetermined criterion when the beam includes a plurality of sources.
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公开(公告)号：US10061024B1
公开(公告)日：2018-08-28
申请号：US14843715
申请日：2015-09-02
申请人： Mark C. Fersdahl
发明人： Mark C. Fersdahl
CPC分类号： G01S13/953 , G01S7/06 , Y02A90/18
摘要： A weather radar module for an aircraft is described. The weather radar module includes a weather display and a processor. The processor is configured to control a radar antenna of the aircraft to perform a radar beam sweep and to receive radar returns. The processor is further configured to perform an estimation of a weather vertical location based on the radar returns, the estimation comprising estimating an altitude error correction due to a beam shape of the radar beam and due to weather model parameters of a weather model and correcting for the altitude error correction. The processor is further configured to cause the weather display to display weather based on the received radar returns, and the estimation of the weather vertical location.
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公开(公告)号：US10024958B2
公开(公告)日：2018-07-17
申请号：US14394734
申请日：2014-02-13
发明人： Takaaki Kishigami
摘要： A radar receiver receives reflection wave signals which are a radar transmission signal reflected by a target with plural respective antenna system processors, and estimates an incoming direction of the reflection wave signals. A correlation vector power calculator calculates a correlation vector power based on a correlation vector including outputs of the plural respective antenna system processors. A direction vector correlation calculator calculates a direction vector correlation power on the basis of the correlation vector and a direction vector including information of amplitude and phase deviations that occur between the plural respective antenna system processors for each azimuth angle range of an incoming direction of the reflection wave signals. A distance/azimuth angle detector estimates an azimuth angle of an incoming direction of the refection wave signals based on the correlation vector power and the direction vector correlation power.
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公开(公告)号：US20180164419A1
公开(公告)日：2018-06-14
申请号：US15123374
申请日：2015-03-05
申请人： Acconeer AB
发明人： Mats Ärlelid , Denis Chouvaev , Mikael Egard
CPC分类号： G01S13/103 , G01S7/28 , G01S2007/4065
摘要： According to one aspect of the inventive concept there is provided a transmitter-receiver system comprising: a transmitter arranged to transmit a wavelet; a receiver arranged to receive a wavelet; a wavelet generator arranged to generate a reference wavelet; and timing circuitry arranged to receive a reference clock signal, output a first trigger signal for triggering transmission of a wavelet and output a second trigger signal for triggering generation of a reference wavelet. The timing circuitry further comprises a delay line including at least one delay element and being arranged to receive a signal at an input of the delay line and transmit a delayed signal at an output of the delay line, wherein a state of each delay element of at least a subset of said at least one delay elements is switchable between at least a first state and a second state. A delay element in said first state, i.e. switched to its first state, presents a first propagation delay. A delay element in said second state, i.e. switched to its second state, presents a second propagation delay which differs from the first propagation delay by a value which is smaller than a period of the reference clock signal. Thereby a total propagation delay of the delay line is configurable by controlling the state of each delay element of said subset. The system further comprises a controller arranged to control a delay between the first trigger signal and the second trigger signal by controlling the total propagation delay of the delay line. The system is arranged to correlate the reference wavelet with a received wavelet for at least one setting of the total propagation delay.
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公开(公告)号：US09846223B1
公开(公告)日：2017-12-19
申请号：US14208771
申请日：2014-03-13
摘要： Systems, devices, and methods efficiently calculate optimal flight paths for protected entities given terrain data, aircraft position, flight characteristics, and positions of known threat emitters. The systems and methods execute within the mission planning timeline, and the developed processes allow users to retrieve data from the calculations to effectively place an electronic attack platform at the right place and at the right time to be effective. The calculated optimal flight paths are displayed or otherwise visualized in the mission space. Electronic attack jamming capabilities are combined with projected threat emitter performance information in order to obtain optimal geometrical positioning of the electronic attack relative to the threat emitter. Threat emitter system characteristics are combined with electronic attack aircraft capabilities while simultaneously incorporating the position of the protected entity aircraft and rendered to assist the electronic attack aircrew in providing optimal electronic attack capabilities to protect one or more entities.
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公开(公告)号：US09841499B2
公开(公告)日：2017-12-12
申请号：US14510394
申请日：2014-10-09
发明人： David Ding
CPC分类号： G01S13/04 , G01S7/28 , G01S7/285 , G01S13/56 , G08B13/2491 , G08B29/185
摘要： A motion detector includes a microwave-based module to detect movement. Intermediate processing circuitry is coupled to an output from the module. The processing circuitry is activated intermittently to produce first and second pulsed output signals. Cross-correlation circuitry processes the two signals to produce a motion indicating output signal.
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公开(公告)号：US09829566B2
公开(公告)日：2017-11-28
申请号：US14552505
申请日：2014-11-25
发明人： Sandeep Rao , Karthik Subburaj
CPC分类号： G01S7/023 , G01S7/28 , G01S7/354 , G01S13/34 , G01S13/343 , G01S13/38 , G01S13/583 , G01S13/931
摘要： Radar detection of an object is achieved by identifying a first range associated with a possible object based on a first return from a first radar transmission having a first chirp rate, and identifying a second range associated with the possible object based on a second return from a second radar transmission having a second chirp rate that differs from the first chirp rate. The first and second ranges are evaluated together to determine whether the possible object is a true object.
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公开(公告)号：US09810568B2
公开(公告)日：2017-11-07
申请号：US14512814
申请日：2014-10-13
发明人： Stuart James Heath
摘要： A guided wave radar level measurement device includes a process connection composed of an outer conductor and a central conductor. The central conductor is surrounded at least in part by a dielectric material. One or more resilient metal seals can be employed to form a hermetic seal around a portion of the probe. The metal seal protects the dielectric material such that the hermetic seal is isolated from process and temperature shock. The metal seal(s) can be further mated with one or more insulators and one or more gaskets, the metal seal(s) to provide a thermal and mechanical barrier as well as offering chemical resistance to the guided wave radar level measurement apparatus.
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公开(公告)号：US09791552B1
公开(公告)日：2017-10-17
申请号：US14547461
申请日：2014-11-19
申请人： SRC, Inc.
发明人： Harvey K. Schuman
CPC分类号： G01S7/4026 , G01S7/2813 , G01S7/40 , G01S13/4463
摘要： The present invention is directed to an antenna system and a method that is configured to compute calibration element voltage gain patterns as functions of a digital antenna model and a plurality of complex beamformer voltages, determine calibration through path transfer functions from the plurality of complex voltages, and remove the calibration element voltage gain patterns from the calibration through path transfer functions to determine a beamforming network transfer function. The beamforming network transfer function and the far-field element voltage gain patterns are combined to obtain a system transfer function used to revise a calibration table.
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公开(公告)号：US09791548B2
公开(公告)日：2017-10-17
申请号：US14429343
申请日：2013-09-10
发明人： Yasunobu Asada , Takuya Okimoto
CPC分类号： G01S7/282 , G01S7/4004 , G01S7/4008 , G01S13/28 , H03F1/3247 , H03F3/24
摘要： A pulse compression radar for performing pre-distortion is provided, which has a configuration simplified in circuit structure. A radar apparatus (pulse compression radar) includes an antenna configured to externally transmit a transmission signal transmitted by a power amplifier and receive a reflection signal caused thereby as a reception signal. The radar apparatus includes a reception circuit configured to propagate this reception signal to a radar image creating module. The radar apparatus corrects beforehand, by utilizing the transmission signal (feedback signal) transmitted from the power amplifier, a transmission signal to be inputted into the power amplifier so as to cancel distortion of the transmission signal caused by amplification effect of the power amplifier. Further, a circuit where the reception signal passes and a circuit where the feedback signal passes share a part of each other.
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