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6518916 |
Object recognition apparatus
This invention relates to an object recognition apparatus. This apparatus comprises an antenna which emits transmission beams toward a plurality of directions; a receiving circuit which receives...
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6509866 |
Fast chirp transform
A Fast Chirp Transform (FCT) for the digital processing of chirp signals and exemplary applications. The FCT is a generalization of a multidimensional Fast Fourier Transform. Phase coefficients for...
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6492936 |
Frequency spectrum analyzer
Circuitry and technique for improving the analysis of a signal, such as radar return, by eliminating the effects of frequency variations of the carrier and thereby stabilizing the modulation...
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6492932 |
System and method for processing squint mapped synthetic aperture radar data
A method for processing squint-mapped synthetic aperture radar data of the present invention. The inventive method includes the steps of effecting range compression of the data; deskewing the data;...
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6480142 |
Method and apparatus for measuring velocity and turbulence of atmospheric flows
A method and apparatus for measuring the parameters of atmospheric turbulent flows utilizes the Doppler shifted frequencies of received radar signals backscattered from sound generated...
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6469657 |
FFT-based filtering for low-quality signal direction finding
A radio direction finding system for a low signal quality transmission signal performs a Fast Fourier Transform (FFT) on an entire received RF band into a number of FFT bins, each serving as an IF...
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6469662 |
Procedure for the elimination of interference in a radar unit of the FMCW type
This invention concerns a procedure for the elimination of interferences, such as pulses and linear chirps, in a radar unit of the FMCW type. According to the procedure, the useable signal in the...
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6456227 |
Weather radar
An antenna section radiates a pulse beam and receives its reflected wave, and a signal processing section observes a rain or cloud occurring region within a covered area based on a signal intensity...
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6448921 |
Channelized monobit electronic warfare radio receiver
An electronic warfare radio receiver of the monobit type wherein the signal processing circuitry, including a bandpass filter array, analog to digital converter circuit and Fourier transformation...
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6445339 |
FM-CW radar apparatus
This FM-CW radar apparatus comprises a transmitter section, a receiver section, and a signal processing section. The transmitter section transmits a frequency-modulated continuous wave as a...
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6437729 |
Integrator for radar return signals with high acceleration uncertainty
A radar signal processing method and system for detecting target objects of unknown acceleration and having low SNRs which reduces the computational burdens and provides a more efficient way of...
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6437730 |
Method for checking an fm/cw type radio altimeter, and radio altimeter designed for the implementation of this method
A radio altimeter using a linear oscillator to send out a continuous wave that is frequency modulated linearly between two boundary values sends the antenna installation an incident signal,...
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6400306 |
Multi-channel moving target radar detection and imaging apparatus and method
A radar detection and imaging system provides for the simultaneous imaging of the stationary objects on the earth's surface and the detection and imaging of moving targets. The radar system...
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6396436 |
Radar method for measuring distances between and relative speeds of a vehicle and one or more obstacles
The present invention relates to a CW radar method for measuring distances between and relative speeds of a vehicle and one or more obstacles. The present invention further provides that the...
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6384769 |
Method for measuring distances/speeds of plural targets and radar apparatus, capable of discriminating moving targets from stationary targets
The present invention discriminates between moving targets and stationary targets in order to measure distances and speeds of the targets without producing a false target. The invention transmits...
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6380882 |
Motion detector based on the doppler principle
A motion detector based on the Doppler principle contains a microwave module for emitting a microwave signal containing at least two frequencies into a room under surveillance and for receiving the...
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6377206 |
Method for clutter rejection in digital imagery
A method for filtering clutter from a first digital input image is disclosed. Generally, the method includes the steps of applying at least first and second transforms to first digital image data...
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6373427 |
Radar distance measuring device
The invention relates to a radar distance measuring device. An especially linear frequency-modulated high frequency signal is emitted via an antenna and mixed with an echo signal reflected by a...
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6366232 |
Method and sensor for detecting foreign bodies in a medium with a radar
A method of detecting foreign bodies in a medium with a radar having a transceiver, and including emitting a radar wave through a wall surface into the medium with the transceiver, detecting a...
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6339395 |
Radar apparatus using digital beam forming techniques
A radar apparatus is provided which is designed to form digital beams using beat signals each of which is produced by one of a plurality of receivers and analyze the frequency of the beat signals...
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6335701 |
Radar system and coherent integrating method thereof
Disclosed is a radar system capable of obviating a problem that a sufficient improvement of an S/N ratio could not be obtained in the prior art, and comprising a transmitter/receiver for detecting...
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6320531 |
FM-CW radar system for measuring distance to and relative speed of target
An FM-CW radar is provided which may be employed in anti-collision systems or cruise control systems installed in moving objects such as automotive vehicles. The radar analyzes a beat signal in...
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6313781 |
Simultaneous intrapulse analysis, direction finding and LPI signal detection
The present invention relates to multi-function, multi-channel digital receiver architecture for performing three distinct receiver functions including simultaneous intrapulse analysis, direction...
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6313785 |
Dual detection processing for detecting signals with high acceleration uncertainty
Dual path detection processing in which a low SNR signal processor detects signals over a limited range of low acceleration values and a high SNR signal processor detects signals over a wider range...
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6310575 |
Method for the detection especially of small sea targets
A method for the detection of a target by a radar in the presence of noise, the detection being performed on M antenna rotations, comprises at least: a first step for the estimation of the Doppler...
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6307500 |
Method of moment estimation and feature extraction for devices which measure spectra as a function of range or time
The computation system of the present invention comprises an improved method of moment estimation for devices which measure spectra as a function of range or time. The preferred embodiment of this...
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6297764 |
Radar receiver having matched filter processing
An electronic counter-measure receiver can be colocated with a threat simulator radar, which transmits a radar signal. As a pulsed-Doppler signal, this transmitted radar signal is sampled as a...
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6292129 |
Structure of radar system with multi-receiver channel
A radar apparatus is provided which includes a transmitter, a receiver, and a signal processor. The transmitter produces a transmit signal which is so modulated in frequency as to change with time...
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6292128 |
Time domain detection and clockless logic electronic warfare receiver
A broadband radio receiver of the type usable in receiving and identifying the pulsed signals of radar transmitters in an electronic warfare environment. The receiver includes signal presence...
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6281833 |
Range rate aiding in a pulsed radar system
A timing and control method and apparatus (111) for performing precise range rate aiding includes a range gate delay means (114) for generating an estimate of the range gate delay (135) each pulse...
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6278398 |
Sensor system operating method and a sensor system
A method in which a sensor system with a frequency-modulated signal source an a delay line for generating a time-delay reference signal is implemented. Phase errors are compensated by correcting...
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6275183 |
System and method for limiting histograms
Apparatus and methods for reducing data flow through a signal processing system are disclosed. A method according to the invention includes receiving a set of tags from an input system, where each...
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6275180 |
Collision warning system
A collision warning system (10) discriminates between objects which pose a threat of collision from those which do not by measuring the relative sightline rate of the object, this being a measure...
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6271787 |
System and method for detecting signals across radar and communications bands
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...
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6266004 |
Radar method used in a motor vehicle
The invention relates to a radar method for an automatic intelligent traffic control (AICC) in a motor vehicle. The use of a frequency modulation continuous wave method (FM-CM) is suggested in...
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6259397 |
Radio wave source information display apparatus
A radio wave source information display apparatus including: a signal processing circuit having a means for performing the Fourier transform with respect to azimuth of an electric field signal...
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6259399 |
GPS receivers and garments containing GPS receivers and methods for using these GPS receivers
A GPS receiver having multiple GPS antennas. Also described is a method of tracking employing the GPS receiver and a communication transmitter. Also described is a garment having a GPS receiver and...
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6255986 |
Calibration method and arrangement
To calibrate a transmitter and/or sender for controlling a beam forming network, each of the control signals is divided into a plurality of frequency segments. The control signal of each frequency...
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6252540 |
Apparatus and method for two stage hybrid space-time adaptive processing in radar and communication systems
A Two-Stage Hybrid algorithm offers significant improvement in the false alarm rate and detection performance of Space-Time Adaptive Processing in non-homogeneous environments for both radar and...
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6249243 |
Radar apparatus for use on vehicle
Provided is a radar apparatus for use on a vehicle and for detecting one target or two or more targets present in a scan range by scanning the scan range with a radar beam, which has a means for...
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6246354 |
Method of determining of permittivity of concrete and use of the method
A method of determining a relative permittivity (ε r ) of concrete including providing a radar apparatus to be positioned on a concrete mass and having a transmitting antenna (2) for emitting a...
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6246357 |
Radar apparatus
A radar apparatus is provided with signal converting means for FFT-transforming an output signal of reception means for detecting a reception electromagnetic wave; amplitude peak value detecting...
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6232912 |
Method for detecting a target by means of a high pulse repetition frequency radar system
The invention particularly relates to the detection of fast-flying targets by means of an HPRF radar system that operates with a plurality of switchable pulse-repetition frequencies (PRFs). In the...
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6229475 |
Pulse doppler radar system with improved cluster target resolution capability
A radar processing system is disclosed with an improved cluster target resolution capability. The invention provides a system and method for processing radar returns and generating first and second...
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6211815 |
Coherent radar detection using non-coherent architecture
In a radar system having a transmitter that produces pulses to be radiated by an antenna and a receiver that detects target information, complex demodulation is performed on an attenuated and...
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6204802 |
Apparatus for detecting relative velocity
In order to produce relative velocity signals in accordance with the relative velocity between a following and a preceding vehicle, a Doppler signal transmitter, which targets the preceding...
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6204800 |
Method for monitoring the earth surface
The invention relates to a method for monitoring the earth's surface with a moving aircraft using a radar sensor with a synthetic aperture. In order to produce high resolution radar images, the...
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6192322 |
Moving object and transient event detection using rotation strip aperture image measurements
A spinning strip aperture imaging radiometer sensor system and data processing methods for detecting moving objects derived from a plurality of image frames acquired by a strip aperture imaging...
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6188348 |
Radar ice sounder with parallel doppler processing
A radar ice sounder which employs parallel Doppler processing obtains more reliable and accurate radar ice sounding. The invention uses both incoherent and coherent techniques, in the same...
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6181270 |
Reference-based autofocusing method for IFSAR and other applications
A reference-based autofocusing procedure is particularly suited to existing and future interferometric SAR systems, though the principles are generally applicable to signal processing systems for...
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