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Class 342/193 - Harmonic


Subclass of Class 342 - Communications: directive radio wave systems and devices (e.g., radar, radio navigation)
Definition: Subject matter including means to identify and evaluate
No. of patents: 65
Last issue date: 08/17/2010


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NumberTitleIssue Date
7777672Radar system and method
The invention relates to a radar system which comprises: (a) at least two transmitting units for simultaneously, and in synchronization transmitting electromagnetic radiation in distinct frequencies f1, f2, f3 . . . towards a space o...
08/17/2010
7777671Radar system and method
The invention relates to a radar system which comprises: (a) at least two transmitting units for simultaneously, and in synchronization transmitting electromagnetic radiation in distinct frequencies f1, f2, f3 . . . towards a space o...
08/17/2010
7382311Method, computer program product and system for differentiating physical sources from second order nonlinear signal effects
A system for differentiating between a signal from a physical source and a nonlinear signal effect includes an array, a delay control element and a signal processing element. The array is configured to detect a signal at a particular location using an initial time d...
06/03/2008
7372897Portable information communication terminal, program, and recording medium
The number of times for averaging operation for averaging a correlation value of a received signal and a reference signal is properly controlled. When the correlation value is not averaged, since a lower limit value TH_A of a correlation level of a distribution of t...
05/13/2008
7352800Method of partial parallel interference cancellation
A method of Partial Parallel Interference Cancellation (PPIC) is provided for recursively eliminating the Multiple Access Interference from a received signal. Such method is to use a recursion way to eliminate all the Multiple Access Interference (MAI) one by one fr...
04/01/2008
7295148Radar system with RCS correction
There is provided a radar system having an input amplitude correcting function in which even when a large reflection wave exceeding a dynamic range of an A/D converter is inputted, an RCS calculation without a time lag can be executed at high precision, high reliabi...
11/13/2007
7277681Interrogator of moving body identification device
To reduce the size, weight and cost of an interrogator which is included in an RFID system and required to have a high output power, the interrogator for transmitting a signal shares a radio wave source or a power supply with a portable wireless terminal such as a m...
10/02/2007
7221311Radar
A radar includes a transmitter circuit, a receiver circuit, an antenna and a circulator. The receiver circuit includes a low-noise amplifier which amplifies a received signal fed from the antenna through the circulator. A local oscillator provided in the receiver ci...
05/22/2007
7209071System and method for distance measurement
A system and method for performing distance measurement using wireless signals. A time of flight calculation is enabled by an interrogating device that transmits an interrogation signal to a responding device, which returns a synchronized signal back to the interrog...
04/24/2007
7106244Freight container monitoring system
A system and a method for monitoring a freight container are provided. The method includes the steps of generating a resonant spectrum representative of an initial condition of internal surfaces and contents of the freight container, and saving the resonant spectrum...
09/12/2006
7079072Helicopter recognition radar processor
A radar processor is disclosed for processing the radar return samples from a Doppler radar receiver to discriminate helicopter targets from fixed-wing targets. The radar processor defines the spectral components of the radar return components due to the helicopter ...
07/18/2006
7071869Radar system using quadrature signal
A radar system using a quadrature signal includes a quadrature push—push oscillator for generating four harmonics with a 90-degree phase difference from each other, and producing two-balanced 2nd harmonic signals from the harmonics; a first coupler bloc...
07/04/2006
7046192Radar process for classifying or identifying helicopters
A radar method of classifying generating or identifying helicopters, by generating a one-dimensional distance profile of the helicopter to be classified or to be identified by measuring the radar each of the helicopter fuselage, the radar echo of the rotor head of t...
05/16/2006
6967612System 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 to HCE threats. The system has radar only, or both radar and video se...
11/22/2005
6914552Magneto-radar detector and method
A varying magnetic field excites slight vibrations in an object and a radar sensor detects the vibrations at a harmonic of the excitation frequency. The synergy of the magnetic excitation and radar detection provides increased detection range compared to conventiona...
07/05/2005
6876296Smart license tag system
A system for providing the identification and tracking of motor vehicles that includes a probe device that transmits a radio frequency modulated signal to a transponder unit that is located within a vehicle registration tag of a vehicle. The transponder unit respond...
04/05/2005
6765527System and method of radar detection of non-linear interfaces
A harmonic radar nonlinear junction detector system for detecting concealed weapons, electronics, and other man-made objects utilizing state-of-the art wireless technology, circuit fabrication, signal synthesis, and computer processing techniques to detect and chara...
07/20/2004
6683559Unwanted peak detection for radar
An unwanted peak occurring due to an antenna sidelobe and an unwanted peak occurring due to a harmonic are eliminated in a radar apparatus. A peak from a target that can cause an unwanted peak is found based on the intensity of the peak, and a search is m...
01/27/2004
6677882Multi-octave high-resolution receiver for instantaneous frequency measurements
An RF band receiver for concurrently monitoring a plurality of contiguous channels within the RF spectrum to unambiguously detect time-coincident signals. The receiver includes a plurality of transmission paths feeding a like number of digital, mixed-base...
01/13/2004
6577265Multi-stage processing for efficient and accurate spectral moment estimation
A multi-stage processing system receives data from signals that indicate information related to scatterers, such as signals from a Doppler scanning system. The multi-stage processing system tracks allowed processing time for the data. The multi-stage proc...
06/10/2003
6573861Target classification method
A target classification method for radar systems wherein, in particular, jet aircraft, are classified in that the blade repetition rate and, in a further step, the number of blades, of an engine rotor wheel are determined and thus the type of engine is id...
06/03/2003
6531979Adaptive time-compression stabilizer
Circuit for stabilizing the spectral extent of a varying signal containing harmonically related frequency components and having particular utility in the spectral analysis of radar return for the purpose of target identification. The variable signal is wr...
03/11/2003
6469656Method of detecting moving and/or stationary objects in the path of a vehicle
A method is described for detecting moving and/or stationary objects in the path of a vehicle, where the distance and velocity of the reflecting object are determined by using a radar sensor, where the frequency of the signal transmitted is modulated in t...
10/22/2002
6400305Wide band radar detector with three-sweep input stage
A police radar detector detects police radar signals in the X, K and wide Ka police radar bands and rejects interfering Ka band signals that are a higher harmonic of a nuisance source having a fundamental frequency adjacent to the X police radar bands. Ea...
06/04/2002
6344818Apparatus and method for the detection of materials
A device to detect the presence of a target material comprising a source module and detector module. The source module includes a generator to producing a source signal corresponding to a characteristic frequency of the target material. The detection nodu...
02/05/2002
6243036Signal processing for object detection system
Methods and apparatus for detecting objects are disclosed. In one embodiment of the invention, a person entering a secured or "Safe Zone™" is illuminated with low-power polarized radio waves. Differently polarized waves which are reflected back from the...
06/05/2001
6040796Radar system installable in an automotive vehicle for detecting a target object
A modulation signal generating section produces a modulation signal for controlling an oscillation frequency of a voltage-controlled oscillator. The modulation signal generating section comprises a triangular wave oscillator producing a linear modulation ...
03/21/2000
5872536Multi-sensor anticipatory object detection system
A multi-sensor anticipatory object detection system for detecting the instantaneous range, relative velocity, collision angle and point of impact of a colliding object includes a plurality of transducer devices angle a fixed distance in which each said tr...
02/16/1999
5867118Apparatus for and method of classifying patterns
An apparatus for and method of classifying a pattern including performing a wavelet transform. The invention finds particular application in the field of automatic target recognition, in which the pattern appears in a return radar signal, and the classifi...
02/02/1999
5757309Spatial frequency feature extraction for a classification system using wavelets
An iterative process to determine the wavelet function and combination of ales of the function which provides data where there is a large separability compared to the separability of the data set prior to processing. Wavelets are selected for inclusion in...
05/26/1998
5706010Method and apparatus for determining location of an unknown signal transmitter
A method and apparatus determines the location of a signal transmitter located at an unknown location by using externally-induced intermodulation distortion emitted from the signal transmitter. A transmitter locator emits an interrogation signal having a ...
01/06/1998
5592171Wind profiling radar
Clutter present in radar return signals as used for wind profiling is substantially removed by carrying out a Daubechies wavelet transformation on a time series of radar return signals. The smoothly varying nature of the return from clutter provides a rel...
01/07/1997
5565872System and method for detecting and characterizing vibrating targets
A method and system for processing radar return signals reflected from a vibrating target to determine the actual vibration frequency and to isolate a characteristic vibration of the vibrating target, including an oscillation signature function (OSF). A r...
10/15/1996
5561431Wavelet transform implemented classification of sensor data
An improved classifier estimates a classification of a sensed object. Data representing the sensed object are received by a sensor, such as a radar, and transformed into wavelet transform coefficients. A subset of the wavelet transform coefficients are se...
10/01/1996
5546088High-precision radar range finder
The present invention pertains to a radar range finder for high-precision, contactless range measurement, which is based on the FMCW principle and operates with digital signal processing at a limited frequency shift. One exemplary embodiment is described....
08/13/1996
5376940Helicopter recognition radar processor
A radar processor is disclosed for processing the radar return samples from a Doppler radar receiver to discriminate helicopter targets from fixed-wing targets. The samples are passed through a helicopter filter which eliminates the target skin Doppler re...
12/27/1994
5347282Apparatus for the observation and indentification of helicopters
Apparatus for the observation and identification of helicopters by means of an FM-CW radar apparatus provided with transmitter means (1), antenna means (2) and receiver means (3). Blade flashes caused by the rotor blades are digitized by A/D converter (4)...
09/13/1994
5191343Radar target signature detector
An improved radar system utilizing the principle of nonlinear contact effects for detecting and identifying a target, includes two radar transmitters (12,16) at least one of which is a baseband pulse radar transmitter. Both transmitters illuminate the sam...
03/02/1993
5150124Bandpass filter demodulation for FM-CW systems
A method and device for bandpass filter demodulation for FM-CW systems which includes providing a FM-CW signal to an input of a bandpass demodulator, amplifying the FM-CW signal, timing the bandpass demodulator at an integer multiple of the FM-CW signal f...
09/22/1992
5073780Cooperative passive identification system for moving or stationary objects
This method can be used either as an independent radar system or as an adct to an existing radar system, after suitably modifying the existing system, and will provide a cooperative, Radio Frequency passive, identification system for either stationary or...
12/17/1991
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