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7602331 |
Computationally efficient adaptive radar pulse compression system
One aspect of this disclosure relates to a method for processing a received, modulated radar pulse to resolve a radar target from noise or other targets. According to an embodiment of the method, a...
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7598900 |
Multi-spot inverse synthetic aperture radar imaging
Providing multi-spot inverse synthetic aperture radar (ISAR) imagery is disclosed. Embodiments of techniques in accordance with the present disclosure may advantageously improve multiple target...
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7535408 |
Apparatus and methods for detection of multiple targets within radar resolution cell
A method and apparatus is operative for multiple target detection in a radar system which employs a radar waveform of two or more frequency diverse subpulses. The apparatus adds coherent processing...
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7515093 |
Active antenna radar system
A radar system comprising a transmit antenna, a receive antenna and a mixer for combining a signal received by said receive antenna with a reference signal to produce an output signal. The transmit...
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7504984 |
Large scale imaging with spatially-coded waveforms
A system for locating earth cavities, or items in a building, or structural characteristics having a plurality of transmitters that generate at least a portion of a waveform. Each transmitter...
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7495598 |
Methods and systems for avoidance of partial pulse interference in radar
Systems and methods for avoidance of partial pulse interference in radar. The systems and methods include a radar processor for generating control signals that direct the generation and...
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7474962 |
Methods and systems of relative navigation for shipboard landings
A method for guiding the approach and landing of an aircraft is provided. The method involves receiving navigation information from the aircraft, receiving navigation information from an aircraft...
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7403153 |
System and method for reducing a radar interference signal
A system and method are provided to reduce an interfering signal in a radar return signal for a frequency modulated continuous wave (FMCW) radar. Once the interfering signal is detected, an extent...
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7362261 |
Linear frequency-modulated pulse radar
A linear frequency-modulated pulse radar system is provided in which the echo signal is mixed with a de-ramp signal, in order to reduce the bandwidth. The transmission signal of the pulse radar and...
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7308043 |
Scrambled chirp frequency jitter for feature suppression
A method of minimizing detectability of an electronically communicated message is disclosed. A predetermined frequency modulation pattern about a nominal transmission frequency is defined. The...
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7301453 |
Locator system and method
A locator system includes two main components, namely, (1) a beacon tag that is readily attached to a person or article, and (2) a transportable finder or receiver/processor for sensing the...
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7265711 |
High-frequency oscillator, high-frequency transmission-reception apparatus using the same, radar apparatus, and radar-apparatus-equipped vehicle and small boat equipped with the same
A high-frequency oscillator that can tune oscillation characteristics is provided. A high-frequency oscillator includes a Gunn diode serving as a high-frequency oscillation element that generates...
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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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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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7236120 |
Ultra-wideband detector systems for detecting moisture in building walls
A non-destructive detection method and system enables detecting a moisture patch located inside a building wall or the like. A transmitter generates a series of ultra-wideband pulses while an...
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7199747 |
Generating a fine time offset using a SiGe pulse generator
A method and apparatus for generating short electronic pulses using a modified differential trigger that is partly an analogue sinusoidal voltage and partly a selectable, DC voltage. The...
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7196658 |
Waveform generation method, waveform generation program, waveform generation circuit and radar device
A conventional waveform generation circuit was required to increase a number of bits or a sampling rate for a D/A converter to enhance a precision of waveform shaping, and had a problem that a cost...
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7151483 |
System and method for concurrent operation of multiple radar or active sonar systems on a common frequency
A system and corresponding method for the concurrent operation of multiple radar systems on a common frequency and in the same geographical area includes a waveform generator that specifies certain...
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7151484 |
Pulse compression processor
A pulse compression processor 20 compressing a modulated pulse signal correlately received by a receiver, includes a coefficient calculator 30 calculating a set of filtering coefficients for...
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7148839 |
Operational bistatic radar system synchronization
A bistatic radar has a radar transmitter at a first location on a moving platform having a motion and a radar receiver at a second location, remote from the first location. The transmitter...
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7148840 |
Radar apparatus, radar apparatus controlling method
A radar apparatus comprises: a transmitter unit having a high-frequency oscillating unit whose oscillation frequency is variable, and a pulse amplitude modulating unit for amplitude-modulating a...
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7148841 |
Radar device
A radar device includes a code generator, a transmission section, a reception section, a delay section, a despreading process section, a correlation value detection section, a target detection...
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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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7136013 |
Radio-wave radar system and adaptive cruise control system
In a radio wave radar system using a two-frequency CW modulation method, it is possible to detect a distance between a host vehicle and a forward vehicle and to realize a stable ACC following...
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7081848 |
Orthogonal pulse range ambiguity resolution
A method for active ranging, such as radar, which sequentially transmits pulses of mutually different waveforms. Receive processing is performed concurrently for all the transmitted waveforms...
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7079071 |
Radar apparatus
A radar apparatus includes: a modulation signal generating circuit that generates a modulation signal; a carrier wave generating circuit that generates a carrier wave; a modulation circuit that...
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7064703 |
Methods and apparatus for randomly modulating radar altimeters
A method for randomly phase modulating a radar altimeter is described. The method includes momentarily applying a signal from a random noise source to an amplifier, applying an output of the...
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7053814 |
RF lightwave coding system for radar pulse compression
An apparatus for preparing a RF radar transmit waveform and for decoding RF return waveforms comprising: a RF-lightwave encoder and a decoding preprocessor to phase-encode the RF radar transmit...
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7023378 |
Self-calibrating wideband phase continuous synthesizer and associated methods
The synthesizer and method provide a relatively wideband swept frequency signal and include generating a first swept frequency signal with a first generator, and successively switching between...
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7002511 |
Millimeter wave pulsed radar system
A millimeter wave pulsed radar system includes a radar synthesizer having a voltage controlled oscillator/phase locked loop (VCO/PLL) circuit, direct digital synthesizer (DDS) circuit and...
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6989782 |
Ultra-wideband radar system using sub-band coded pulses
Methods and apparatus are provided for radar systems using multiple pulses that are shorter than the expected range delay extent of the target to be imaged. In one implementation, a method for...
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6973355 |
Accurate positioner suitable for sequential agile tuning of pulse burst and CW lasers
A positioning system including a sensor, a drive sequencer and an actuator. The sensor senses the actuator position and provides position signals to drive the sequencer which responsively computes...
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6965341 |
High resolution SAR processing using stepped-frequency chirp waveform
A stepped-frequency chirped waveform improves SAR groundmapping for the following reasons. Range resolution in SAR image is inversely proportional to the transmitted signal bandwidth in nominal SAR...
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6956522 |
Pulse radar system
A pulse radar system has a high-frequency source, which supplies a continuous high-frequency signal and is connected on the one side to a transmission-side pulse modulator and on the other side to...
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6930631 |
Sensor front-end with phase coding capability
A sensor front end for an electronic radar sensor is disclosed that provides for a lower parts count while providing technical functionality by using multifunction parts, i.e., parts that are used...
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6894641 |
Radar system mounted on vehicle
To provide a radar system mounted on a vehicle that reliably detects the reception of the interference wave with high-performance and inexpensively. There is provided a radar system mounted on a...
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6891497 |
Chirp-based method and apparatus for performing phase calibration across phased array antenna
A chirp-based method and apparatus measures phase variation through a reference frequency transport cable for a phased array antenna. A chirp is injected into the a signal transport path from a...
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6850553 |
Chirp slope multiple access
In a chip radio communication system, a novel technique for increasing the number of transmitters, or users, that can be simultaneously accommodated in the communication system and the data...
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6653974 |
Method for clearly determining the intermediate frequency difference in a frequency-controlled radar system
In a method for the determination of the unambiguous range for the measurement of the IF deviation in a frequency-regulated radar system, a frequency adjustment or tuning of the radar system is...
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6624783 |
Digital array stretch processor employing two delays
A pulse-type beamforming apparatus, such as a radar array system, is used for receiving, detecting, localizing, and/or imaging desired signals. The apparatus is used to receive wideband chirp...
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6573982 |
Method and arrangement for compensating for frequency jitter in a laser radar system by utilizing double-sideband chirped modulator/demodulator system
A frequency jitter compensation radar system which frequency modulates a transmitter laser beam with simultaneously generated up- and down-chirped frequency modulated signals. The frequency...
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6531976 |
Adaptive digital beamforming radar technique for creating high resolution range profile for target in motion in the presence of jamming
A wideband adaptive digital beamforming technique for maintaining a high range resolution profile of a target in motion in the presence of jamming utilizes a sequence of adaptively calculated...
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6466159 |
Target detection arrangement
Radar apparatus in which output RF signals are modulated on an optical signal prior to transmission. Incoming optical echo signals are converted into RF signals using a detector. The original...
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6396436 |
Radar method for measuring distances between and relative speeds of a vehicle and one or more obstacles
The present invention relates to a CW radar method for measuring distances between and relative speeds of a vehicle and one or more obstacles. The present invention further provides that the...
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6208285 |
Pulse compressor for doppler tolerant radar
A radar system employing Doppler tolerant radar pulses such as linear FM or hyperbolic FM chirps includes a pulse compressor configured as a digital finite impulse response filter. In one...
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6195036 |
Pulse radio-localization system
A pulse radar system includes a frequency-agile magnetron comprising an input for giving a feeding voltage of a magnetron tuner. A modulator connected to said magnetron forms pulses of a feeding...
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6181273 |
Radar distance sensor
Microwave radar: an additional modulation of the microwave signal (s (t)) provided for the emission or of the reception signal (e (t)) makes it possible to separate the payload signal from the...
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6160505 |
Method and apparatus for converting an analog signal to a digital signal
A generalized frequency modulation (FM) based method for converting an analog signal to a digital signal. An analog input signal is sampled at the Nyquist rate. Each sample is converted to a...
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6097333 |
Method for range measurement and contour detection by means of microwaves
A method provides for contactless measurement of the range between a transceiver unit for microwaves in the frequency band from 1 to 100 GHz and an object to be investigated using a pulse...
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6091356 |
Chirp source with rolling frequency lock for generating linear frequency chirps
A source for a linear homodyne transceiver that generates repeated linear chirps. A YIG oscillator with a main coil and an FM coil receives a basic linear current ramp at the main coil to generate...
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