| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 342098000 | Frequency | 10 |
| 20100225524 | SPECTRAL ANALYSIS AND FMCW AUTOMOTIVE RADAR UTILIZING THE SAME - A method of processing an input signal to perform frequency analysis is disclosed. The input signal comprises a desired signal and an interference signal. A crosslation is performed to generate a representation of the frequency content of the input signal. The representation comprises initial crosslation values predominantly corresponding to interference and subsequent crosslation values corresponding to the desired signal. For the crosslation values corresponding to interference, a maximum value and slope are calculated. These are used as parameter indicators of the interference and also to identify which values should be discarded in the processing of the desired signal. With the crosslation values corresponding to interference discarded, the remaining crosslation values are processed to calculate properties of the desired signal. | 09-09-2010 |
| 342099000 | Doppler frequency tracking | 5 |
| 20080238762 | SYSTEM AND METHODS FOR MULTISTEP TARGET DETECTION AND PARAMETER ESTIMATION - A system and methods for multistep target detection and parameter estimation which utilizes slices and/or projections of the cross-ambiguity function of the transmitted and received signals of a sensor system is disclosed. The system and methods of the present invention offer a computationally efficient means of detecting targets while achieving a high probability of detection and a reduced false alarm rate. Detection and parameter estimation of targets is accomplished by generating hypotheses and then validating the generated hypotheses. The hypotheses are generated using slices and/or projections of cross-ambiguity functions of transmitted signals and reflections received from the targets without the need to compute the entire cross-ambiguity function. After hypotheses are generated they are validated by determining the amplitude of a cross-ambiguity function at the coordinates of the hypotheses and comparing the amplitude to a predetermined threshold. | 10-02-2008 |
| 20110001656 | RADAR SYSTEM AND SIGNAL PROCESSING METHOD FOR RADAR SYSTEM - A radar system includes: a transmission antenna outputting transmission signals having multiple frequencies; multiple reception antennas receiving reflected waves of the transmission signals, reflected from an object; a mixer mixing the transmission signals with reception signals received by the reception antennas to generate beat signals; and a signal processing unit detecting Doppler frequency by analyzing frequencies of the beat signals, detecting phase information of the Doppler frequency for each of combinations of the reception antennas and the transmission signal frequencies, constructing a matrix having the pieces of phase information arranged in a predetermined order with respect to the reception antennas and the frequencies of the transmission signals, obtaining a correlation matrix from the matrix and its complex conjugate transposed matrix, and estimating at least one of a distance, direction and relative velocity of the object based on the correlation matrix. | 01-06-2011 |
| 20110215962 | INTERLEAVED BEAM COHERENT RADAR APPARATUS AND PROCESSING METHOD - A method for interleaved pulsed-Doppler processing. Radar energy management and associated processing techniques take advantage of spatial degrees of freedom available on modern, short range, wide angle, volume search ESA radar systems. The method creates an advantage in Doppler resolution when compared to currently utilized Doppler processing techniques. An Electronically Scanned Array (ESA) radar system includes one or more processors that may be programmed to read and execute instructional commands including transmit a plurality of synchronized, coherent pulsed transmit beams having substantially repeatable gain and phase pattern characteristics; electronically steer the plurality of transmit beams in a respective, sequential plurality of spatially diverse directions in a temporally-interleaved manner; sequentially collect a respective plurality of receive beams in a respective plurality of time vs. range buffers; determine a range-Doppler output at a selected, common receive position in each of the plurality of buffers. | 09-08-2011 |
| 20120056772 | 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 sensors. Further aspects are directed to aligning the (unknown) time-delayed and Doppler-shifted signals received at the multiple sensors relative to an arbitrary reference sensor, which depend on the unknown target position. This results in the target position and velocity vectors being simultaneously estimated and the detection peak enhanced by obtaining near coherent gain. Still further aspects are directed to the coherent generalized likelihood ratio test (GLRT) and the minimum variance distortionless response (MVDR) statistic for multistatic radar systems, conditioned on estimation of certain parameters that render the system coherent. Analytical and computer simulation results are presented to show substantially enhanced detection and geolocation of moving targets in clutter. | 03-08-2012 |
| 342101000 | With filter control | 1 |
| 20120256780 | RADAR EQUIPMENT AND RECEIVED DATA PROCESSING METHOD - According to one embodiment, a radar equipment includes a radio transmitter, a pulse compressor, a Doppler filter, and an integration processor. The radio transmitter receives pulse signals and digitizes the received pulse signals by oversampling with a frequency higher than that for generation of a pulse compression coefficient to generate digital data. The pulse compressor performs pulse compression on the digital data using the pulse compression coefficient to generate range bin data for each of the pulse signals. The Doppler filter processor performs Doppler filter processing on the range bin data. The integration processor integrates the range bin data subjected to the Doppler filter processing for each range bin. | 10-11-2012 |
| 342102000 | Phase | 4 |
| 20120280851 | PULSE RADAR RANGE PROFILE MOTION COMPENSATION - A pulse radar range profile motion compensation method ( | 11-08-2012 |
| 20160084943 | Radar System For Automated Vehicle With Phase Change Based Target Catagorization - A radar system suitable for an automated vehicle includes a plurality of antennas configured to detect a reflected radar signal reflected by an object in a field-of-view of the system. Each antenna of the plurality of antennas is configured to output detected signals indicative of the reflected radar signal detected by each of the plurality of antennas. The system also includes a controller configured to receive the detected signals from the plurality of antennas, determine if the object is present in the field-of-view based on the detected signals, and determine a phase-difference between symmetrical-frequency-bins for each antenna. The symmetrical-frequency-bins are symmetrically offset from a maximum-amplitude non-coherent-integration detection-frequency-bin (max-NCI-bin). The controller is further configured to determine a classification of the object based on a time-domain-analysis of the phase differences across the plurality of antennas. | 03-24-2016 |
| 342103000 | Phase locked loop | 2 |
| 20100171648 | MODULAR RADAR SYSTEM - A radar system includes at least two modules, each having a phase detector and a first high-frequency source and each having an antenna output and/or each having one or more antennas. At least two modules include a device for synchronization between the first high-frequency source of a first module of the at least two modules and the first high-frequency source of a second module of the at least two modules of the radar system. The phase detector has a first input for a first reference signal. The phase detector also has a second input for a first loop signal. A module for a radar system has the design of one of the modules of the radar system described above. | 07-08-2010 |
| 20120127020 | DISTRIBUTED TIME-REVERSAL MIRROR ARRAY - A distributed time reversal mirror array (DTRMA) system includes a plurality of independent, sparsely distributed time reversal mirrors (TRMs). Each of the TRMs includes an antenna; a transceiver connected to the antenna for transmitting a signal toward a target, for receiving a return, reflected signal from the target, and for retransmitting a time-reversed signal toward the target; means for phase-locking and for maintaining spatial and temporal coherences between the TRMs; and a computer including a machine-readable storage media having programmed instructions stored thereon for computing and generating the time-reversed retransmitted signal, thereby providing a phased array functionality for the DTRMA while minimizing distortion from external sources. The DTRMA is capable of operating in an autonomous, unattended, and passive state, owing to the time-reversal's self-focusing feature. The beam may be sharply focused on the target due to the coherently synthesized extended aperture over the entire array. | 05-24-2012 |
