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7522089 |
Airborne look-down doppler radar tracking of hovering helicopters using rotor features
A system and method is presented for detecting and classifying slow-moving and hovering helicopters from a missile's look-down Doppler radar that is compatible with the existing base of Doppler...
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7477181 |
Method of adaptively adjusting the target detection sensitivity of a motor vehicle radar
The factory-calibrated target discrimination threshold of a radar-based motor vehicle back-up aid is adaptively lowered under specified vehicle operating conditions to provide enhanced target...
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7474255 |
Target tracking method of radar with frequency modulated continuous wave
The present invention relates to a target tracking method of radar with frequency modulated continuous wave, which transmits a transmitted signal to receive a return wave of the transmitted signal...
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7286079 |
Method and apparatus for detecting slow-moving targets in high-resolution sea clutter
An apparatus for non-coherently detecting slow-moving targets in high resolution sea clutter includes a binary detector for converting high resolution radar returns, produced in response to a radar...
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7250900 |
System and method for sidelobe reduction using detect-and-subtract techniques
A radar system and method for detecting targets using pulse-compressed signals is disclosed. In one application, the systems and methods can be used to detect one or more relatively small targets...
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7248207 |
System and method for sidelobe reduction using point spread function expansion
Systems and methods for detecting targets using pulse-compressed radar signals are disclosed. In one application, relatively small targets that are masked by the time-sidelobes of a larger target's...
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7218269 |
Method for enlarging the interference-free dynamic range of non-linear signal processing components
A method for enlarging the interference-free dynamic range of non-linear signal-processing components in receiver systems, in the conversion of input frequencies f in into output frequencies f out...
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7205929 |
Radar system and vehicle controller incorporating radar system
An electromagnetic wave is transmitted from a signal transmission antenna using a signal transmission IC; this electromagnetic wave is received, after having been reflected by a target object, by...
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7145503 |
Surface wave radar
A surface wave radar system including a receive antenna array ( 20, 22 ) for generating receive signals, and a data processing system ( 24 ) for processing received data representing the receive...
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6967612 |
System and method for standoff detection of human carried explosives
The system and method for standoff detection of human carried explosives (HCE) is a portable system that automatically detects HCE up to a range of 200 meters and within seconds alerts an operator...
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6873287 |
Signal processing arrangement
The present invention relates to a method and an arrangement suitable for embedded signal processing, comprising a number of computational units ( 100 ), each computational unit comprising a number...
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6850186 |
System for determining position and velocity of targets from signals scattered by the targets
The present invention relates to a system for using signals scattered by targets to determine position and velocity for each of the targets and comprises a set of transmitters and receivers of...
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6844843 |
Signal processing apparatus of radio radar
A signal from CW radar is received, and the received power detected by the CW radar's swinging in all directions is averaged in each direction. Then, the maximum value and the minimum value of the...
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6822222 |
Threat identification for mass spectrometer system
A controller that processes the mass spectrum of a sample provided by a detector of a mass spectrometer, for example, by a field portable mass spectrometer system. The controller provides a...
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6816798 |
Network-based method and system for analyzing and displaying reliability data
A network-based method and system for analyzing and displaying reliability data from a user is provided. The method includes recording reliability data, obtaining unreliability plots, obtaining...
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6771209 |
Automatic radar target detector
The invention provides improved target detection and clutter rejection, and is applicable to pulse radars operating a mixed clutter and noise environment. It employs a signal amplitude expandor...
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6765525 |
Method for reducing false alarm rate in radar images
A method for reducing the false alarm rate, i.e. the number of alarms of fixed targets erroneously declared as moving targets in the radar images of two- or multi-channel MTI radar devices, wherein...
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6717545 |
Adaptive system and method for radar detection
This invention relates to an adaptive detection system and method for analyzing range-doppler-azimuth data for target detection. The detection system has a threshold calculator for calculating a...
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6677886 |
Weather and airborne clutter suppression using a cluster shape classifier
A method of determining the presence of a weather or other airborne (non-aircraft) clutter in a radar detection system is disclosed. The method includes feature calculations of a cluster of...
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6456231 |
Radar sensor having a CFAR detector
A constant false alarm rate (CFAR) detector prevents false radar triggers due to RF interference by proportionally increasing the radar detection threshold as interference increases. The radar...
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6433730 |
Noise riding threshold control with immunity to signals with high pulse repetition frequencies and high duty cycles
A system and method is disclosed for a radar receiver, such as a wideband crystal video early warning receiver, to automatically detect the noise level of the radar receiver with immunity to high...
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6426716 |
Modulated pulse doppler sensor
A range gated microwave motion sensor having adjustable minimum and maximum detection ranges with little response to close-in false alarm nuisances such as insects or vibrating panels. The sensor...
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6411250 |
Electromagnetic sensor system
A vehicle ( 160 ) such as a motor road vehicle is fitted with an electromagnetic sensor system comprising transmitting means (e.g. 4, 1 ) for transmitting a radio frequency signal, receiving means...
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6388608 |
Method and system for detecting turbulence with reduced errors resulting from vertical shear components
A system and method for enhancing turbulence detection, display and alerting with avionics weather radars which includes automatically making multiple scans, measuring a wind velocity gradient at...
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6369749 |
Adaptive control of the detection threshold of a binary integrator
The present invention provide a method and system of dynamically estimating a coefficient of variation of the fluctuation of a waveform and an optimal binary detection threshold using the estimated...
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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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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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6259396 |
Target acquisition system and radon transform based method for target azimuth aspect estimation
A Radon transform based method that provides for target azimuth aspect estimation and target shape measurement. A Radon transform is applied to a binary (N×N pixels) target chip to extract target...
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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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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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6201496 |
Target angle estimator for search radars
A search radar including the improvement of apparatus for enhancing the estimation of the target angle within a search scan of the radar is disclosed. More specifically, the improvement apparatus...
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6087977 |
False alarm rate and detection probability in a receiver
An improved performance receiver associated with a radar system for detecting targets over a specified range area whereby the receiver, which is responsive to a return signal corresponding to an...
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6081225 |
Radar signal processing chip
A radar signal processing (RSP) chip is used to process massive radar signals. The RSP chip includes a multiply and accumulate (MAC) array and a programmable delayer. The programmable delayer...
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6064334 |
Clutter resistant target detector
A ranging device is disclosed that monitors for changes in a scene of interest. The ranging device includes a transmitter that sends pulses into the scene, a receiver that generates pulse samples...
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6018310 |
Radar device with false-alarm control on scatter
The invention relates to a radar device comprising two antennae fed by the same emission means, but serving reception means which are separated at least in part into two channels, followed by...
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5949368 |
Adaptive constant false alarm rate circuit with extremely low loss
A false alarm rate is maintained at or below a desired rate over a fluctuating mean noise level for providing additional sensitivity and increased range performance in a constant false alarm rate...
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5905459 |
Methods and apparatus for stabilizing radar false alarm rate
A radar system and method for operation of the same in a manner in which the false alarm rate is stabilized is provided. The system includes an automatic gain control (AGC) processing function...
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5861837 |
Poly-frequency CW doppler radar system with leakage cancellation and method
A single antenna poly-frequency Continuous Wave (CW) Doppler radar system having leakage cancellation. The system provides for transmitting a plurality of carrier frequency signals and receiving...
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5808579 |
Radar system using a cell averaging constant false alarm rate device
A cell averaging (CA) constant false alarm rate (CFAR) device for use in a radar system which filters noise and clutter from a signal containing a plurality of range cells. A moving window average...
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5798728 |
Radar signal processing apparatus
The radar signal processing apparatus according to the present invention comprises a noise distribution measurement system comprising an edge detecting circuit, a noise distribution measuring...
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5793326 |
Methods of generating a clutter threshold and arrangements for executing the methods
A method and arrangement for generating a clutter threshold by means of a CFAR circuit. In the process the partial registers of the CFAR are subdivided into storage blocks each containing a...
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5764182 |
Polarimetrical processing detection circuit for radar receiver
This target detection polarimetrical processing circuit comprises, in parallel, a polarimetrical CFAR detector provided with a target detection output, a polarimetrical clutter-rejection filter...
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5748142 |
Pulse doppler radar system which identifies and removes electromagnetic interference
A radar system for identifying an object of interest. A transmitter produces a first signal and a duplexer receives the first signal from the transmitter. An antenna transmits the first signal into...
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H001726 |
CFAR time-frequency processor for signal detection and extraction in noise
Detection and extraction of unknown signal in noise may be important in radar When an unknown signal of a transient nature is received, representation in terms of basis functions, localized in both...
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5703592 |
Method and apparatus for estimating the detection range of a radar
A method and apparatus estimate the detection range R 1 of a radar in the presence of noise and clutter. The radar return signals from a range cell under test and from a plurality of surrounding...
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5652594 |
Signal processor affording improved immunity to medium anomalies and interference in remote object detection system
A signal processor is described for object detection systems such as radar and sonar systems in which wave energy is transmitted and received as a train of discrete pulses of frequencies stepped in...
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5644315 |
Doppler ratio detection radar with range CFAR
This invention improves the detection performance of doppler radar by censoring clutter at the output of the doppler processor, and it functions in operative association with a range CFAR. By a...
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5640429 |
Multichannel non-gaussian receiver and method
A process and system for improving the detection of signals in additive correlated non-Gaussian noise using multichannel data. This improves detection performance of receivers through the signal...
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5546089 |
Optical monopulse chirp processor
An optical chirp processor for the collection and processing clutter samples is presented that allows the simultaneous estimation of both the clutter mean and variance. The estimated clutter mean...
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5539409 |
Apparatus and method for windshear data processing
The present invention improves upon conventional windshear data processing techniques in three mutually exclusive aspects. First, the present invention provides an improved method and system for...
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