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Class 342/162 - Digital


Subclass of Class 342 - Communications: directive radio wave systems and devices (e.g., radar, radio navigation)
Definition: Subject matter including means to process the returned radar
No. of applications: 36
Last issue date: 02/03/2011


Application No.Application TitleIssue Date
20110025546Mobile sense through the wall radar system
A method and apparatus for sensing a target through a wall or obstruction by a Moving Target Indicator (MTI) radar sensor. In an exemplary embodiment, a series of radar pulses are transmitted at frequencies less than about 5 GHz. Radar return signals are received at a p...
02/03/2011
20100302091WIDEBAND INTERFERENCE CANCELLATION USING DSP ALGORITHMS
A method and system is provided for detecting and characterizing pulsed threat radar emitters through heavy in-band interference. System includes an advanced digital signal processing method provides spatial and temporal interference cancellation, super-resolution direc...
12/02/2010
20100245157Generalized inner product method and apparatus for improved detection and discrimination
Method and apparatus for improving the detection and discrimination of slow moving or stationary range-Doppler spread objects on or in close proximity to the ground (or sea surface). Invention detects, discriminates and separates radar returns from interference includin...
09/30/2010
20090174595SAR ATR treeline extended operating condition
A synthetic aperture radar acquires an image of one or more objects and identifies them as targets. The objects are located in the proximity of clutter within the image such of trees, or a tree line. The radar acquires a SAR image having pixels descriptive of the clutte...
07/09/2009
20090109083Adaptive moving target indicator (MTI) clutter rejection filter for radar systems
Apparatus for providing moving target indicator (MTI) filtering in the presence of clutter for a radar receiver employing digital pulse compression to provide at an output a compressed digital pulse for application to the input of a MTI digital filter, including a digit...
04/30/2009
20090096662Moving Target Detector for Radar Systems
Various embodiments are described herein for a moving target detector that processes input data to perform detection for a current range cell. The moving target detector includes a Doppler filter bank module for processing the input data to provide several Doppler outpu...
04/16/2009
20080174475SIGNAL PROCESSING FOR ACCELERATING MOVING TARGETS
A method for performing signal processing for accelerating moving targets, in one implementation, encompasses a method for performing coherent integration of pulses within a CPI for SMTI radar. In an embodiment, the method comprises the steps of determining the Fast Fou...
07/24/2008
20070296625WIDEBAND INTERFERENCE CANCELLATION USING DSP ALGORITHMS
A method and system is provided for detecting and characterizing pulsed threat radar emitters through heavy in-band interference. System includes an advanced digital signal processing method provides spatial and temporal interference cancellation, super-resolution direc...
12/27/2007
20070285303Airborne 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 took-down Doppler radar that is compatible with the existing base of Doppler radars. This approach uses definable attributes of a helicopter rotor assemb...
12/13/2007
20070279278METHOD AND APPARATUS FOR EQUALIZING BROADBAND CHIRPED SIGNAL
In order to generate a signal for canceling a chirped signal, a transmitter generates a cancellation signal along with the transmitted signal, using a single term variable complex gain multiplier adapted to cancel the chirped signal only at its instantaneous frequency, ...
12/06/2007
20070247353Method and Apparatus for Performing Bistatic Radar Functions
A bistatic radar system having a transmitter that generates unique signals at spatially independent transmitter degrees of freedom and a receiver that filters the signal at each receiver degree of freedom into a group of signals identical in number to the number of tran...
10/25/2007
20070200751Correlation processor for receiver
A correlation processor for a receiver is capable of carrying out a correlation process with highly suppressed side lobes, improved resolution, and minimized S/N loss. The correlation processor is provided for a receiver that receives a signal having a specific time wid...
08/30/2007
20070200750UNIQUE SPACE TIME ADAPTIVE SYSTEM (USS)
A method of detecting radar returns and measuring their parameters with or without clutter present and no clutter cancellation employed which includes transmitting at least one pulse; processing the returns surpassing a threshold detected in one range azimuth bin and by...
08/30/2007
20070188377Novel waveform ambiguity optimization for bistatic radar operation
A radar transmitter is at a first location on a moving platform and illuminates a target with a sequence of frequency modulated radar pulses. The frequency modulated pulses are linear frequency modulated, i.e. chirped. The target reflects the frequency modulated radar p...
08/16/2007
20070188376RADAR PROTECTION DEVICE FOR WIRELESS NETWORKS
A method for radar protection. The method includes recording energy events and calculating differences in recorded energy events to determine pulses. The method further includes sorting intervals between pulses into histogram bins, each bin representing a range of time ...
08/16/2007
20070139258Apparatus and method for instantly automatic detecting clutter blocks and interference source and for dynamically establishing clutter map
An apparatus for detecting clutter blocks and an interference source for dynamically establishing a clutter map includes a clutter block detecting module accumulates a plurality of range cell data of each detecting area, and compares the accumulated value with a clutter...
06/21/2007
20070040729System 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 whose pulse-compressed signals are masked by the time-sidelobes of a large...
02/22/2007
20060273951Radar system and method for reducing clutter in a high-clutter environment
A radar system transmits an environment-sensing pulse and processing circuitry time-reverses an order of radar return samples and generates a convolution matrix from the radar return samples resulting from a transmission of the environment-sensing pulse. The processing ...
12/07/2006
20060238412Method 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 pulse scan of a plurality of identical pulses, into corresponding binary...
10/26/2006
20060220949Interferometer-type rader
A transmitter for transmitting signals to targets and a receiver having a large-diameter array antenna for receiving signals reflected from targets are included. The transmitter has a function of outputting an FMCW signal for detecting direction and velocity of the targ...
10/05/2006
20060220946Interferometer-type radar
A transmitter for transmitting signals to targets and a receiver for receiving signals reflected from targets are included. The transmitter outputs CW signals for detecting direction and velocity of the target. The receiver performs: a function of receiving signals refl...
10/05/2006
20060152403Method and apparatus for a frequency diverse array
Method and apparatus for a frequency diverse array. Radio frequency signals are generated and applied to a power divider network. A progressive frequency shift is applied to all radio frequency signals across all spatial channels. Amplitude weighting signals are applied...
07/13/2006
20060109162Technique for enhanced quality high resolution 2D imaging of ground moving targets
A radar receiver on a moving platform images a moving target and non-moving clutter using a single SAR array. The radar receiver converts the radar returns into digital radar returns and motion compensates the digital radar returns with respect to a reference, then appl...
05/25/2006
20060109173Adaptive ground clutter cancellation
The present invention refers to an airborne radar device (1) comprising at least two antennas (2, 3) and clutter suppressing means (4). The radar device is arranged, via the antennas (2, 3) to send out radar pulses focused in main lobes (5...
05/25/2006
20060109164Efficient autofocus method for swath SAR
A moving radar generates a search mode synthetic aperture image of a patch from periodic pulse returns reflected from the patch. The patch is imaged from radar returns derived from two or more overlapping arrays. A strong scatterer is located within each array, then the...
05/25/2006
20060097909Multistatic adaptive pulse compression method and system
A radar receiver system includes a receiver, a processor, and a detector. The processor is programmed with a Multistatic Adaptive Pulse Compression (MAPC) algorithm for estimating adaptively a pulse compression filter, for each range cell of a plurality of range cells, ...
05/11/2006
20060097910Process for tracking vehicles
The invention is process for tracking a moving targeted vehicle from a remote sensor platform comprising the steps of 1) tracking the targeted vehicle and periodically recording its radar signature until its identity becomes ambiguous, 2) tracking the target after it ha...
05/11/2006
20060097908Radar pulse compression repair
A radar pulse compression repair (RPCR) system includes a receiver for receiving a radar return signal, a matched filter for applying matched filtering to the radar return signal to generate a matched filter output, a processor programmed for applying Radar Pulse Compre...
05/11/2006
20060066475Method for reducing angular blur in radar pictures
The invention refers to a method for reducing angular blur in radar pictures achieved in range bin based detection systems. A variable S(x,y) such as amplitude, power or the like is measured as a function of an angle x and a distance y. According to the invention an exp...
03/30/2006
20060033656System and method for adaptive broadcast radar system
An adaptive broadcast radar system for tracking targets is disclosed. The radar system includes a transmitter having sub-apertures and a receiver having sub-apertures. The transmitter sub-apertures generate and code a signal waveform. The signal waveform is coded with d...
02/16/2006
20060028376Radar protection device for wireless networks
A method for radar protection. The method includes recording energy events and calculating differences in recorded energy events to determine pulses. The method further includes sorting intervals between pulses into histogram bins, each bin representing a range of time ...
02/09/2006
20060028371CONFORMAL RANGE MIGRATION ALGORITHM (CRMA) "KARMA"
Motion compensation for coherent combination of pulses facilitates a SAR image of a scene on earth's surface. A great circle (406) is centered with respect to the earth's center, The great circle (406) has an axis (412) perpendicular to a first plan...
02/09/2006
20050219115Method for determining positions of targets by bistatic measurements using signals scatttered by the targets
The present invention relates to a method for determining the positions of targets by bistatic measurements using signals scattered by the targets. Also the velocities of the targets can be determined. The range of the transmitters is selected so that a target at an arb...
10/06/2005
200502126922-d range hopping spread spectrum encoder/decoder system for RF tags
An airborne radar interrogates tags on friendly ground vehicles, which when interrogated by a downlink signal from the radar, sends back a very low level uplink message signal that appears noise-like so as to avoid enemy detection and exploitation. This is achieved by r...
09/29/2005
20050073455Method for SAR processing without INS data
A SAR radar avoids the need for an INS/GPS by focusing a SAR image having discernible features and a center. The image is formed from digitized returns, each of said digitized returns having a phase and an amplitude. The focusing steps are: storing digitized returns acq...
04/07/2005
20050046610ADVANCED ASYNCHRONOUS PULSE DETECTOR
An asynchronous pulse detector including a data estimator which estimates the return signal based on the corrected return signal, a detector for detecting an asynchronous pulse in the return signal, and a selector for selectively outputting the estimated return signal i...
03/03/2005
 
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