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8868324 Relative vehicular positioning using vehicular communications  
The relative position of one vehicle vs. another vehicle, both driving in a vehicular environment, is determined using vehicular communications based on the IEEE 802.11 standard. The relative...
8766827 Parallel apparatus for high-speed, highly compressed LZ77 tokenization and Huffman encoding for deflate compression  
Parallel compression is performed on an input data stream by processing circuitry. The processing circuitry includes hashing circuitry, match engines, pipeline circuitry and a match selector. The...
8730092 Multistatic target detection and geolocation  
Aspects of this invention are directed to the substantially improved detection and geolocation accuracy of targets (stationary or moving) by using the coherent data received at multiple airborne...
8645053 Relative vehicular positioning using vehicular communications  
The relative position of one vehicle vs. another vehicle, both driving in a vehicular environment, is determined using vehicular communications based on the IEEE 802.11 standard. The relative...
8633805 Systems and methods to determine motion parameters using RFID tags  
Systems and methods to determine motion parameters of physical objects using radio frequency identification (RFID) tags attached to the objects. In one embodiment, a method implemented in a radio...
8576664 Moving object detection system  
A moving object detection system is provided with an existence detection part, an integrating part and an existence judgment part. Based on first and second detection signals, the existence...
8559491 Methods and devices for determining the impulse response of propagation channels involving emitters, reflectors and sensors that are fixed or mobile  
A method for measuring certain parameters of the impulse response of a propagation channel involving emitters and reflectors that are fixed or mobile, and for detecting and determining the...
8355473 Methods and systems with simplified doppler spread classification  
Certain embodiments of the present disclosure propose methods and systems for classifying the Doppler spread based on the output of the frequency-tracking loop (FTL) discriminator in WiMAX systems...
8242888 Systems and methods to determine motion parameters using RFID tags  
Systems and methods to determine motion parameters of physical objects using radio frequency identification (RFID) tags attached to the objects. In one embodiment, a method implemented in a radio...
8188911 Low noise generator for frequency swept signals  
A signal generation system suitable for use in a radar system comprises a local oscillator (LO) and an intermediate frequency (IF) oscillator, wherein the IF oscillator is a Direct Digital...
8170135 Methods and apparatus for emitter detection  
A method is provided for coordinating detection of emitted signals by a receiver with transmission of signals by a transmitter, wherein the receiver and the transmitter are located on the same...
8149159 Radar coasting during data dropout  
A method for rapid convergence of radar target state includes the steps of using range acceleration to estimate perpendicular velocity and jump-starting a Cartesian state filter with the estimated...
7995682 Method and apparatus for performing signal processing using historical correlation data  
A method and apparatus for estimating a satellite signal parameter in a satellite positioning system receiver is described. In an example, a plurality of correlation results between a satellite...
7970081 Delay-doppler channel response demodulation method and apparatus  
A wireless communication device uses a time-invariant delay-Doppler channel response estimate for received signal demodulation. The device provides coherent signal demodulation by accounting for...
7970083 Estimating doppler frequency in ISDB-T systems  
A technique for estimating maximum Doppler frequency of a wireless signal in a wireless communication system, wherein the method comprises receiving a wireless signal; determining an impulse...
7911375 Doppler beam-sharpened radar altimeter  
Systems and methods for Doppler beam sharpening in a radar altimeter are provided. In one embodiment, a method comprises receiving a return signal at a radar altimeter receiver and applying a...
7876262 Radar system  
Electronically steered radar systems such as frequency scanning radars are particularly suitable for detecting and monitoring slow moving, ground-based targets. So-called crawler radar systems are...
7856066 OFDM receiver and doppler frequency estimating circuit  
A radiofrequency signal is converted to an intermediate frequency signal by a tuner, which is amplified by a variable gain amplifier. The so-amplified signal is converted into a digital signal by...
7768963 System and method of improving sampling of WLAN packet information to improve estimates of Doppler frequency of a WLAN positioning device  
Systems and methods of improving sampling of WLAN packet information to improve estimates of Doppler frequency of a WLAN positioning device. A device estimates the position of itself. The device...
7756498 Channel estimator and method for changing IIR filter coefficient depending on moving speed of mobile communication terminal  
Disclosed is a channel estimator and a method for changing a coefficient of an IIR filter depending on a moving speed of a mobile communication terminal. In the channel estimator, a coefficient...
7714782 Phase arrays exploiting geometry phase and methods of creating such arrays  
In the context of array sensors such as radar, sonar, and communications receiver arrays, the present invention exploits the geometry phase components of radiated wavefronts associated with the...
7626536 Non-scanning radar for detecting and tracking targets  
Radar for detecting and tracking short range airborne targets using a non-scanning beam to illuminate the entire search space, and processing the return signals from a plurality of spaced apart...
7579976 Systems and methods for discriminating signals in a multi-band detector  
A radar detector is operated to suppress nuisance radar alerts by identifying a first signal in radar band of interest, e.g., having a frequency that is a harmonic of a first nuisance local...
7561098 System and method for estimating airborne radar antenna pointing errors  
Methods and systems for estimating and correcting airborne radar antenna pointing errors. The methods and systems include predicting expected received power from at least one scattering source...
7456740 Detector device  
The present invention relates to a detector device and, more particularly, to a detector device comprising a self-diagnosis means for monitoring the correct performance or otherwise of the device....
7405869 Method and system of local oscillator signal generation  
Methods and apparatus for local oscillator generation are provided. In a method embodiment, a method of signal processing includes splitting a signal having a first frequency into at least a first...
7375676 Mutual interference processor for pulse radar  
Pulsed or mutual interference in a pulse radar system is ameliorated by a process that includes a pulse-Doppler filter, some frequency bins of which correlate with clutter. Pulsed interference is...
7376210 Apparatus and method for performing adaptive channel estimation in a mobile communication system  
Disclosed is an adaptive channel estimator for improving a performance of a general channel estimator in a mobile communication system, and a method for controlling the same. The adaptive channel...
7336218 Radar 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...
7324041 Method for solving two RF signals' angular position  
A method for determining an angle for each of two RF signals at different frequencies and offset from each other. The average angle of a composite signal is obtained from the two RF signals over a...
7317417 Methods for detection and tracking of targets  
The present invention relates to active sensor applications, and more particularly is directed to efficient systems and methods for detection and tracking of one or more targets. The invention...
7248208 Methods 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...
7176826 System and method for detection of emitter signals using multiple intercept rules  
A system and method is provided for detecting emitter signals and for determining a scan strategy for a receiver system that receives such emitter signals. A rule-based system is provided for...
7164737 Method for estimating doppler frequency  
Disclosed is a method for estimating a Doppler frequency with phase information, thereby estimating a maximum Doppler frequency. The method for estimating the Doppler frequency includes the steps...
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...
7053815 Radar tracking system  
A radar tracking system for an anti-aircraft, missile, including angle tracking, doppler tracking and range tracking feedback loops operating on sum and difference channels. Fast fourier transform...
6995705 System and method for doppler track correlation for debris tracking  
The present invention is directed to a system and method for Doppler track correlation for debris tracking in PCL radar applications. The disclosed embodiments describe the systems and methods...
6972710 Automotive radio wave radar and signal processing  
In an automotive radio wave radar, a center frequency of a transmitted wave is shifted at a certain cycle, and position information of an obstacle detected at three or more center frequencies is...
6933878 Wide bandwidth radar  
A wave-form generator drives a number of microwave generating devices each operating at different frequency bands. The output of each microwave generator is connected to its own transmission...
6801155 Method and apparatus for recognising a radar target  
A method of recognizing a radar target comprises producing a sequence of Doppler spectra of radar returns form a scene and producing therefrom a sequence of Doppler feature vectors for a target in...
6677887 Intrusion detection radar system  
An outdoor microwave transceiver intrusion detector that alternately transmits pulses of RF energy at two different frequencies and uses range and direction of travel information derived from the...
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...
6556942 Short range spread-spectrum radiolocation system and method  
A short range radiolocation system and associated methods that allow the location of an item, such as equipment, containers, pallets, vehicles, or personnel, within a defined area. A small,...
6553007 Compensation of doppler shift in a mobile communication system  
The present invention relates to a method and a system for compensating for doppler shift in a signal transmitted between a mobile station and a base station in a mobile communication system. In...
6518916 Object recognition apparatus  
This invention relates to an object recognition apparatus. This apparatus comprises an antenna which emits transmission beams toward a plurality of directions; a receiving circuit which receives...
6498580 Missile launch point estimation system  
In a system for estimating the launch point of a missile, Doppler shifted signals reflected from the missile as it travels from its launch point are used in a Kalman filter to estimate the missile...
6433730 Noise riding threshold control with immunity to signals with high pulse repetition frequencies and high duty cycles  
A system and method is disclosed for a radar receiver, such as a wideband crystal video early warning receiver, to automatically detect the noise level of the radar receiver with immunity to high...
6429804 Motor-vehicle-mounted radar apparatus  
A target 22 is explored by transmitting an exploration signal 40 at a certain angle while scanning an antenna 23. In the go and return exploration the angle for transmitting the exploration signal...
6297764 Radar receiver having matched filter processing  
An electronic counter-measure receiver can be colocated with a threat simulator radar, which transmits a radar signal. As a pulsed-Doppler signal, this transmitted radar signal is sampled as a...
6275182 Radome polarization error compensation  
Disclosed is a method and apparatus for improving airborne vehicle tracking and guidance systems by reducing boresight error induced by polarization of the RF energy impinging on the vehicle...

Matches 1 - 50 out of 155 1 2 3 4 >