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Class 342/192 - Spectrum analysis


Subclass of Class 342 - Communications: directive radio wave systems and devices (e.g., radar, radio navigation)
Definition: Subject matter including means to study the energy distribution
No. of patents: 395
Last issue date: 09/20/2011


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NumberTitleIssue Date
8022864Detection of transient signals in doppler spectra
Signal processing is used to detect transient signals in the presence of noise. Two embodiments are disclosed. In both embodiments, the time series from a remote sensor is broken into a number of short time series. The power spectrum of each short time series are th...
09/20/2011
7893868Radar device
A radar device is mounted on a vehicle, for detecting an object, and includes: a transmitting unit for transmitting an electromagnetic wave as a transmitter signal; a receiving unit for receiving a reflected signal that is reflected from the object as a receiver sig...
02/22/2011
7791532Radar
A radar wherein, in response to an increase in the level of noise appearing in a frequency spectrum caused by interference being superimposed on a beat signal, peaks exceeding a threshold are extracted as target peaks in an ordinary state and a predetermined number ...
09/07/2010
7432849Frequency modulation radar apparatus for vehicle use background of the invention
A frequency modulation radar apparatus for vehicle use can suppress the influence of noise to avoid incorrect estimation due to noise thereby to provide a beat frequency with high accuracy and at high speed without increasing the frequency resolution of the beat fre...
10/07/2008
7424269System, method and device of radar detection
Embodiments of the present invention provide a method, apparatus and system of radar detection. The method, according to some demonstrative embodiments of the invention, may include comparing an energy level of signals received over a wireless communication channel ...
09/09/2008
7421212Detecting and locating pulses using a Bragg cell
Detecting a pulse of a signal includes receiving the signal and a light beam. The signal drives a spatial light modulator to modulate the light beam, where the complex amplitude of the modulated light beam is proportional to the signal current. The modulated light b...
09/02/2008
7417579Weather radar with significance determination
A weather radar system includes processing electronics. The processing electronics sense weather and determine significant weather based upon the altitude of the weather. The altitude of the weather can be compared to a flight path to determine its significance. A d...
08/26/2008
7414567ADS-B radar system
A system and method of using a standard ADS-B transmitter and encoder to identify targets to provide a collision avoidance system, wherein the method includes the steps of providing a standard ADS-B transmitter and encoder, a phase modulator including a digital synt...
08/19/2008
7411540Synthetic aperture radar (SAR) data compression
A method of compressing phase history (PH) data includes (a) dividing PH data into multiple sub-apertures; (b) transforming the sub-apertures into multiple coarse resolution images; and (c) compressing each of the coarse resolution images. Compressing each of the co...
08/12/2008
7397421Method for detecting acoustic emission using a microwave Doppler radar detector
Acoustic emissions are detected by reflecting microwave radar signals off of an object, receiving reflected radar signals, generating an intermediate frequency, and filtering the intermediate frequency to remove low frequency signals associated with object movement ...
07/08/2008
7391361Signal processing method for FM-CW radar
Disclosed is a signal processing method for an FM-CW radar that can accurately detect the relative distance, relative velocity, etc. with respect to a target approaching or receding at a high relative velocity, wherein predicted values for peak frequencies currently...
06/24/2008
7382312Syntactic target classifier
Disclosed is a Syntactic Landmine Detector. The syntactic landmine detector processes a received signal from a ground penetrating RADAR which contains at least one spatial sequence, the spatial sequence containing relative spatial information locating impedance disc...
06/03/2008
7372394Variable loop gain and resolution pulse system and method with point target editing capability
A weather radar system is coupled to antenna. The weather radar system includes a processor for generating pulses and for processing return pulses received by the antenna. The processor generates high resolution data from the return pulses. The processor uses the hi...
05/13/2008
7365675Measuring wind vectors remotely using airborne radar
Airborne meteorological radars and related networks and models. In one embodiment a network for creating a meteorological model includes a mobile sensing node and a modeling node. The sensing node includes a meteorological RADAR that senses the wind velocity. Data f...
04/29/2008
7352321Determining statistical descriptors of a signal from a set of its samples
An entity is subjected to an interrogating signal, and the reflection from the entity is repeatedly sampled to obtain a first set of values each dependent on the intensity of the reflected signal. A logarithmic transformation is applied to the sample values to obtai...
04/01/2008
7339518FMCW radar device and method for detecting interference
An FMCW radar device executes a frequency analysis for a beat signal in a frequency increase interval and a frequency decrease interval, to obtain frequency components in a predetermined high frequency range exceeding a frequency range corresponding to a target dete...
03/04/2008
7339517Radar
A radar wherein a first threshold value is determined in accordance with the intensity of background noise; second threshold values are set in a fixed frequency area around base portions of peaks in the frequency spectrum; the higher one of these second threshold va...
03/04/2008
7336218Radar system with peak frequency analysis and window functions
A radar system in which a beat signal is generated by transmitting a transmission signal that is subjected to frequency modulation into a triangular wave and receiving a reflection signal from a target, the beat signal is sampled, and a window function is applied to...
02/26/2008
7333048Periphery monitoring system
In a periphery monitoring system for monitoring movements of a mobile object around an installation location of a Doppler sensor, a signal output from the Doppler sensor is subjected to an FFT analysis, and a total sum of the frequency levels of all of the frequency...
02/19/2008
7327304System and method for minimizing background noise in a microwave image using a programmable reflector array
A microwave imaging system captures a microwave image of a target and minimizes noise in the microwave image using phase differentiation. A reflector antenna array is provided including a plurality of antenna elements for reflecting microwave radiation towards the t...
02/05/2008
7319320Rotation angle detecting device
An improved rotation angle detecting device that detects a rotation angle of a first member relative to a second member is proposed. The rotation angle detecting device includes a magnet unit fixed to the first member and a pair of magnetic sensors fixed to the seco...
01/15/2008
7304604Radar sensor and method for operating a radar sensor
In a radar sensor, a continuous microwave signal is passed through an RF switch which is periodically controlled by a pulse signal. The pulse signal is frequency modulated in such a way that the spectrum of the pulse signal is expanded without decorrelation occurrin...
12/04/2007
7301495Interrupt SAR implementation for range migration (RMA) processing
A moving radar (405) generates a synthetic aperture image from an incomplete sequence of periodic pulse returns. The incomplete sequence of periodic pulse returns has one or more missing pulses. The radar converts the incomplete sequence of pulse returns into...
11/27/2007
7295149Method for determining missile information from radar returns
A target missile identifier compares radar cross-section (RCS) information about the missile with a set including at least one template of RCS to make determination(s) of at least one of (a) the missile type (solid/liquid propellant), (b) missile main engine cutoff,...
11/13/2007
7295153Acousto-radio frequency modulator and applications therefore
An acousto-radio frequency modulator and an apparatus employing the same are disclosed. The acousto-radio frequency modulator includes a radiowave waveguide including a first end defining an input and a second end defining an output; an acousto-radio material positi...
11/13/2007
7292178Aircraft hazard detection and alerting in terminal areas
A weather radar system or method can be utilized to determine potential weather hazard for an aircraft in a terminal area. The weather radar system can utilize processing electronics coupled to an antenna. The processing electronics can determine presence of the pot...
11/06/2007
7286078Radar system for motor vehicles
A radar system for motor vehicles, having an antenna, a first processor which is developed to transform signals supplied by the antenna via a primary signal path into a spectrum, and a second processor for the additional evaluation of the spectrum, wherein at least ...
10/23/2007
7274322Systems and methods for automatic gain control for multichannel receivers
Apparatus and methods for performing automatic gain control in a radar system. One embodiment of the system includes an attenuator that controls gain of signals received from a radar receiver. A digital signal processor determines coarse gain correction based on dig...
09/25/2007
7266043Method for directional location and locating system
In order to locate electromagnetic or acoustic signal sources of a sensor configuration (1a through 1c) fitted with at least two electric outputs; where the incidence-dependent transfer functions between the acoustic signals incident on t...
09/04/2007
7248208Methods and systems for maintaining a position during hovering operations
A method for maintaining a position of a hovering vehicle that incorporates a radar altimeter is described. The method includes receiving signals at the radar altimeter based on a change of horizontal direction, operating the radar altimeter to generate a Doppler fr...
07/24/2007
7245250Synthetic aperture radar image compression
A method is disclosed of generating multi-resolution images using synthetic aperture radar (SAR) phase history data. A high resolution SAR image may be formed from the phase history data, or a lower resolution SAR image may be formed from a sub-aperture of the phase...
07/17/2007
7236124Radar 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 process...
06/26/2007
7218271System and method for determining patrol speed
A system for processing vehicle speed data for a vehicle is provided. The system includes a front antenna assembly of the vehicle generating a front digital signal, and a rear antenna assembly of the vehicle generating a rear digital signal. A fast Fourier transform...
05/15/2007
7212150Doppler-sensitive adaptive coherence estimate detector methods
A method is provided for detecting a target signal of a specific known form in the presence of clutter. The method includes dividing a set of initial training data, derived from returns from a burst of identical pulses, into a set of censored data and a set of uncen...
05/01/2007
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
7206707Wideband digital IFM receiver
An IFM receiver includes a hybrid for outputting I and Q signals from a received input signal; a first ADC for digitizing the I signal to produce a first digital signal at a sampling rate of 1/τ, and a second ADC for digitizing the Q signal to produce a second digi...
04/17/2007
7202810Radar apparatus and radar signal processing method
A radar apparatus and a radar signal processing method can prevent misdetection even in the case of targets running side by side without an azimuth angle error being varied in accordance with the velocities of the targets. An antenna direction control part controls ...
04/10/2007
7199752Phased null radar
A method for reducing the interference between a source transmitting pulses and equipments having nominal bandwidths which are outside the nominal bandwidth of the transmitted pulses, but which respond to sideband energy of the pulses. Phase perturbations are applie...
04/03/2007
7191507Method of producing a wireless communication device
A method for manufacturing wireless communication devices for use in tracking or identifying other items comprises a number of cutting techniques that allow the size of the antenna for the wireless communication device. Further, the chip for the wireless communicati...
03/20/2007
7183964Mine detection using radar vibrometer
A frequency-stepped radar may be used to detect buried landmines by sequentially inducing vibrations of different frequencies in the landmine. A sensor detects signals associated with the vibrations, and a processor processes the signals to detect the landmine. ...
02/27/2007
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