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7629922 |
Method and system for obtaining in-phase and quadrature components of a signal
A method of obtaining in-phase and quadrature phase components for a narrowband signal is provided. The method includes digitally sampling a narrowband signal at a digital sampling rate to obtain a...
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7623064 |
Instantaneous radar polarimetry
A radar system and method that employs polarization-time diversity in transmitting signals and concurrently processing received reflections from both polarization modes provides information about...
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7606294 |
Channel quality estimation method and receiving apparatus
Channel quality can be detected accurately in a wireless transmission system such as an HSDPA method. In the case of estimating a channel quality of a signal transmitted by a Code Division...
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7598899 |
Method and apparatus for compression of SAR images
A computer system for compressing synthetic aperture radar (SAR) images includes a database for storing SAR images to be compressed, and a processor for compressing a SAR image from the database....
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7589666 |
System and method for processing data in weather radar
Systems and methods that adapt to the weather and clutter in a weather radar signal and apply a frequency domain approach that uses a Gaussian clutter model to remove ground clutter over a variable...
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7558695 |
Self-powered vehicle speed sensor
Sensing vehicle speed is disclosed. A speed sensor is self powered. The speed sensor measures a speed data of multiple vehicles with one Doppler pulse. A sample is taken of speed sensor data from...
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7555051 |
Method and device for estimating IQ imbalance
A quadrature transmitter and receiver have configurable I and Q channel paths that facilitate the application of selected test signals to determine gain and phase imbalances introduced by the...
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7551119 |
Flight path-driven mitigation of wavefront curvature effects in SAR images
A wavefront curvature effect associated with a complex image produced by a synthetic aperture radar (SAR) can be mitigated based on which of a plurality of possible flight paths is taken by the SAR...
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7551118 |
RFI suppression in SAR
A filter scheme for broadcast interference cancellation that is computationally efficient and numerically robust Airborne Low Frequency Synthetic Aperture Radar (SAR) operating in the VHF and UHF...
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7538712 |
Method and apparatus for decompression of SAR images
A computer system for decompressing synthetic aperture radar (SAR) images includes a database for storing SAR images to be decompressed, and a processor for decompressing a SAR image from the...
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7532154 |
Frequency modulation radar device
The frequency modulation radar device includes a transmitting unit ( 5 ), M receiving units for receiving a reflected signal as M channels, a mixing unit ( 7 ) for mixing the transmitting signal...
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7508334 |
Method and apparatus for processing SAR images based on an anisotropic diffusion filtering algorithm
A computer system for processing synthetic aperture radar (SAR) images includes a database for storing SAR images to be processed, and a processor for processing a SAR image from the database. The...
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7504985 |
Multi-dimensional real-array radar antennas and systems steered and focused using fast fourier transforms
Radar systems are disclosed that include a signal generator, an antenna, a switching circuit, an I/Q sampling and signal-demodulation (demodulation) processor, and a FFT processor. The signal...
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7486225 |
Radar device
A data code generator produces a data code, while a reference code generator produces a reference code. The data code is phase-shifted by the data code generator in a predetermined sweep range,...
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7479921 |
Distance measuring device, distance measuring method and distance measuring program
A transmission unit emits an electromagnetic wave having the same frequency f as an output signal from a sending unit in a direction of a measurement axis. A detecting unit performs synchronous...
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7471237 |
Built-in missile RADAR calibration verification
Array antenna calibration verification coupling interrogator and responder with mode-related interrogation signal having a previous calibration phase angle, producing in responder a characteristic...
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7463181 |
Method of suppressing interferences in systems for detecting objects
In a method for suppressing interferences while detecting objects in a target area, a transmitter transmits a sequence of pulses into the target area, and a receiver detects the resulting...
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7456780 |
Method and system for developing and using an image reconstruction algorithm for detecting and imaging moving targets
Image reconstruction approaches that use standard Cartesian-sampled, frequency-domain SAR data, which can be collected by a platform with a single radar antenna, together with its associated...
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7450054 |
Method and apparatus for processing complex interferometric SAR data
A computer system for processing interferometric synthetic aperture radar (SAR) images includes a database for storing SAR images to be processed, and a processor for processing interferometric SAR...
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7439899 |
Encoded transmitted signals in a simultaneous dual polarization weather system
A system for simultaneously propagating dual polarized signals in a polarimetric radar system includes a system for coding at least one of the two signals. The simultaneous dual polarization...
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7417584 |
Monopulse radar estimation of target altitude at low angles of elevation
A monopulse radar operating at low angles of elevation (LOE) receives returns from a target by a direct path and by a path including a reflection from that portion of the Earth's surface lying...
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7414567 |
ADS-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...
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7379017 |
Micro movement pulsed radar system and method of phase noise compensation
A pulsed radar system uses phase noise compensation to reduce phase noise due to drift of the reference oscillator to enable detection of micro movements and particularly human motion such as...
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7372897 |
Portable 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...
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7352800 |
Method 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...
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7298317 |
Gain compensation in an ultra-wideband transceiver
A circuit for providing gain compensation to a swept frequency response in an ultra-wideband system includes using a variable amplitude IF signal into a gigahertz mixer to control the amplitude of...
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7298315 |
Radar 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...
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7295145 |
Selective-sampling receiver
A receiver that selectively samples a received signal in order to suppress an interference component of the signal while recovering a desired component. The selective sampling may be accomplished...
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7295154 |
Vehicle obstacle warning radar
A method for detecting an object using a transmitting antenna and an array of receiving antennas. The method comprises the step of transmitting a signal from the transmitting antenna. The magnitude...
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7280067 |
Radar detector and radar detecting method for WLAN systems according to 802.11 wireless communication standards
The present invention relates to a radar detector and a radar detecting method for WLAN systems according to 802.11 wireless communication standards, and particularly concerns the radar detection...
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7268724 |
Reduced-error monopulse processor
This monopulse processor provides target position information having an RMS error which is less than that of a conventional monopulse processor. A Σ±jΔ vs. Σ processor is modified to provide a...
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7259716 |
Quadrature mixture LO suppression via DSW DAC noise dither
A Quadrature Error Corrected Digital Waveform Synthesizer (QECDWS) employs frequency dependent phase error corrections to, in effect, pre-distort the phase characteristic of the chirp to compensate...
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7250902 |
Method of generating accurate estimates of azimuth and elevation angles of a target for a phased—phased array rotating radar
A method and apparatus for generating accurate estimates of a radar target's azimuth and elevation angles for a phased-phased array rotating radar. Scan modulated coherently integrated (SMCI)...
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7248205 |
Radar apparatus
A transmitter emits into an intended search space a radar wave having a predetermined frequency pulse-modulated by a trigger pulse of a predetermined width. A receiver receives a reflected wave of...
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7236123 |
System for enhanced detection of a target
Disclosed herein is a computer-readable medium having stored thereon computer-executable instructions for providing phase-range data associated with a return pulse of a radar device and second...
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7206707 |
Wideband 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,...
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7205931 |
Method for determining the distance between a base station and a mobile object, in addition to a base station and identification system for a method of this type
A method for determining the distance between a base station (SLG) and a mobile object (DT 1 –DT 3 ). A HF carrier frequency and an offset frequency (df) are predetermined for a QAM modulation....
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7199751 |
Radar equipment
A radar equipment of the present invention amplifies a reception signal with feedback based on the delay amount obtained from the correlation detection result. Accordingly, it becomes possible to...
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7190302 |
Sub-surface radar imaging
Detailed is radar imaging apparatus including a single transmit antenna and at least one receive antenna, scanning apparatus (e.g. a pantograph) for mechanically scanning the antennas over a...
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7183964 |
Mine 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...
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7176828 |
Near-field antenna array with signal processing
Method and apparatus for extracting coherent information from in-phase (I) and quadrature (Q) signals. In a form, signals from an antenna array are mixed to form a plurality of I and Q signals that...
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7170440 |
Linear FM radar
A FM-CW radar system comprises a frequency modulated continuous wave digital generator that produces both in-phase (I) and quadrature-phase (Q) outputs to orthogonally oriented transmitter...
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7167513 |
IQ imbalance correction
An in-phase and guadrature (IQ) imbalance error-correction method includes estimating, on the basis of a constellation error in a received orthogonal frequency division multiplexing (OFDM) signal,...
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7167126 |
Radar system and method for determining the height of an object
System and method for determining the height of an object reflecting a real beam radar signal by receiving the reflected signal with a first and second vertically spaced antennas. Receivers provide...
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7161530 |
System and method for radar calibration using antenna leakage
The system and method for radar calibration using antenna leakage is a simplified means of calibrating the channels in amplitude and phase using natural signal leakage between antennas. It utilizes...
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7145497 |
Robust detection technique of fixed and moving ground targets using a common waveform
Detection of moving targets in SAR images is improved by a radar on a moving platform for generating a focused synthetic aperture image of a scene The scene contains a target described by pixels...
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7142153 |
Short pulse/stepped frequency radar system
A unique hardware architecture that combines short pulse, stepped frequency and centerline processing. The inventive architecture implements a radar system having a transmitter for transmitting...
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7136014 |
System and method for estimating the azimuth pointing angle of a moving monopulse antenna
An invention is provided for determining the azimuth pointing angle of a moving monopulse antenna. Pulses of energy are broadcast at the surface of a planetary body. Reflected signals are received...
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7109916 |
Device for, in particular bistatic radar applications
In a device for bistatic radar applications, at least two spaced-apart radar sensors having separate carrier-frequency oscillators are provided, which do not require phase synchronization. The...
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7106246 |
Oscillator coupled to an antenna and an application
A radio frequency device has an antenna for capturing an incoming signal for processing by the device or for radiating an outgoing signal from the device and a signal processor having one or more...
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