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| Number | Title | Issue Date |
| 7928896 | Application of time reversal to synthetic aperture imaging A method and apparatus for target focusing and ghost image removal in synthetic aperture radar (SAR) is disclosed. Conventional SAR is not designed for imaging targets in a rich scattering environment. In this case, ghost images due to secondary reflections appear i... | 04/19/2011 |
| 7907084 | Radar device and control method of radar device This radar device includes: a transmitter to transmit a transmitting signal whose frequency is periodically increased/decreased at a predetermined rate of change; a mixer to generate a beat signal by multiplying a received signal being transmitted by the transmitter... | 03/15/2011 |
| 7598903 | Sensor for measuring distance and method for measuring distance using the sensor A distance measurement sensor and a distance measurement method using the same are disclosed. The distance measurement sensor can use all of a pulse method and a Continuous Wave (CW) method, can select an appropriate measurement method according to the distance to b... | 10/06/2009 |
| 7561099 | Radar device To provide a radar device that is capable of performing both of long-distance detection performance and short-distance wide-angle monitor in a DBF system radar, there is provided a radar device of a digital beam forming system that radiates waves toward a space, rec... | 07/14/2009 |
| 7420503 | Small-sized low-power dissipation short-range radar that can arbitrarily change delay time between transmission and reception with high time resolution and method of controlling the same In a configuration according to a short-range radar of the present invention and a method of controlling the same, the timing at which a variable-period pulse output from a variable-period pulse generator including a direct digital synthesizer (DDS) has shifted in l... | 09/02/2008 |
| 7379013 | Detecting objects within a near-field of a frequency modulated continuous wave (FMCW) radar system The present disclosure relates to a radar device and technique for detecting the presence of objects located in the near-field of a frequency modulated, continuous wave (FMCW) radar device. The technique includes transmitting and receiving a frequency modulated sign... | 05/27/2008 |
| RE40128 | Stabilization in a radar level gauge A radar gauge adapted to sense fluid level in a tank and including a radar gauge circuit in which radar transmission and level sampling are controlled by a transmit frequency and a sample frequency respectively. A first frequency separation between first and second ... | 03/04/2008 |
| 7315239 | Inter-vehicle communication and warning apparatus A short-range inter-vehicle communication and warning apparatus comprises a forward radar and a backward radar. The apparatus uses the radars to generate Frequency Modulation/Continuous Wave (FMCW) signals, uses amplitude shift keying for data modulation and arrange... | 01/01/2008 |
| 7265598 | Narrow ultra wideband pulse generator A circuitry for generating a narrow impulse including an input device coupled to a matching circuitry that is coupled to a step recovery diode (SRD). The input device is configured to receive a succession of digital input signals, each characterized by having high l... | 09/04/2007 |
| 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 the radar wave and outputs a receive signal. A local pulse generator ... | 07/24/2007 |
| 7239262 | Delivery of quasi-periodic pulses of EM energy utilizing the principle of beating-wave amplification The present invention is related a method and system for irradiating a target location or material with high-amplitude narrow pulses of electromagnetic (EM) energy at a periodic or quasi-periodic rate. The method and system comprises generating at least three electr... | 07/03/2007 |
| 7230565 | Radar A radar can detect target azimuths located outside and adjacent to a scanning angular range of a beam by determining changes in received signal strength (a signal-strength profile) in the azimuthal direction as a function of a beam azimuth in a predetermined scannin... | 06/12/2007 |
| 7139581 | Method and system for distance measurement in a low or zero intermediate frequency half-duplex communications loop A method and system for distance measurement in a low or zero intermediate frequency (IF) half-duplex communications loop measures the distance between two transceivers without synchronizing the local oscillators of the two transceivers. Transceiver distance may be ... | 11/21/2006 |
| 7136753 | Object recognition apparatus for vehicle, inter-vehicle control apparatus, and distance measurement apparatus In an object recognition apparatus for a vehicle which uses intensities of reflected waves from reflecting objects to make a recognition on whether a reflecting object is a vehicle or a non-vehicle, a plurality of transmission waves are emitted to receive a pluralit... | 11/14/2006 |
| 7109915 | Radar apparatus In a radar apparatus for automobiles for transmitting a radio wave, receiving a radio wave reflected from an object and measuring a rate of the object, a digital signal processor has at least two operation modes, a normal operation mode and a low energy consumption ... | 09/19/2006 |
| 7098843 | Automatic sensitivity control for radar level gauges A radar level gauge system for determining the filling level of a filling material in a tank is disclosed. The system comprises an antenna device for emitting measuring signals towards the surface of the filling material and a receiver device for receiving echo sign... | 08/29/2006 |
| 7095362 | Radar measurement device, especially for a motor vehicle, and method for operating a radar measurement device The present invention relates to a radar measuring device which, with a simple design, ensures reliable distance determination even when a mixed signal is zero, and a method for operating a radar measuring device. The radar measuring device includes: A ... | 08/22/2006 |
| 7095363 | Pulse radar apparatus A pulse radar apparatus uses different frequencies, for example, frequencies one of which is a multiple or a submultiple of the other for a signal which becomes a reference of a control pulse for controlling a gate operation for a reception signal and a signal which... | 08/22/2006 |
| 7053820 | Generating three-dimensional images using impulsive radio frequency signals Generating an image matrix includes accessing a round-trip time matrix for a space having points. The round-trip time matrix describes an estimated round-trip time for a signal to travel from a transmit antenna, to a point, and to a receive antenna. Signals reflecte... | 05/30/2006 |
| 7034739 | Delivery of quasi-periodic pulses of EM energy utilizing the principle of beating-wave amplification The present invention is related a method and system for irradiating a target location or material with high-amplitude narrow pulses of electromagnetic (EM) energy at a periodic or quasi-periodic rate. The method and system comprises generating at least three electr... | 04/25/2006 |
| 7023331 | Peripheral monitor for monitoring periphery of vehicle The invention solves a problem of fluctuation in performance in the conventional peripheral monitor for monitoring periphery of a vehicle that measures a distance to other vehicle or any other object by transmitting radio waves and informs a driver of the distance d... | 04/04/2006 |
| 6989781 | Short-range radar system with variable pulse duration A short-range radar system includes short-range radar sensor means and means (41) for HF-impulse generator for the sensor means. The means for HF-impulse generation are embodied for emitting impulses with adjustable pulse duration (51, 53). ... | 01/24/2006 |
| 6911874 | Ultra-wideband impulse generation and modulation circuit A modulated ultra wideband pulse generation system is provided. The system comprises a pulse waveform generator circuit operable to generate an on-off pulse waveform, and a modulating circuit operable to receive a modulating signal and to modulate the on-off pulse w... | 06/28/2005 |
| 6906660 | Radar system and car radar system To provide a radar system for controlling a gate power supply and drain power supply of a MMIC (microwave monolithic IC), protecting the MMIC at the time of start and shut-off, and simultaneously avoiding an occurrence of a failure in the MMIC due to a residual char... | 06/14/2005 |
| 6879281 | Pulse radar detection system A radar based sensor detection system comprises a microwave source operative to provide a continuous wave signal at an output. A pulse-former is coupled to the output of the source and is operative to provide at an output a variable length pulse that increases the t... | 04/12/2005 |
| 6831594 | Guided waver radar level transmitter A guided wave radar measurement instrument comprises a probe defining a guided wave radar transmission line. A pulse circuit is connected to the probe for generating a very fast stream of pulses on the transmission line and receiving reflected pulses returned on the... | 12/14/2004 |
| 6798373 | FM-CW radar system An FM-CW radar system comprises a modulating signal generating means for changing a modulating signal to be applied to a FM-CW wave, a calculating means for calculating a distance or relative velocity with respect to a target object by performing processing for dete... | 09/28/2004 |
| 6741203 | Adaptive radar thresholds system and method A system and method for adapting weather radar gain is disclosed. The system and method includes estimating a freezing altitude. The system and method also includes determining, based on the freezing-altitude estimate, the altitude of more than one atmospheric layer... | 05/25/2004 |
| 6639543 | Sensor front-end for vehicle closing velocity sensor A sensor front end is disclosed that is able to discriminate objects based on their range from the sensor. The sensor includes an antenna that transmits a sensor signal and, if an object is present receives a reflected signal therefrom. A pulsed oscillato... | 10/28/2003 |
| 6587071 | Device for detecting objects in the area surrounding a vehicle A device which can accurately detect even objects in very close proximity to a vehicle and at the same time can reliably detect more distant objects has means (MM) that can execute a selection of those reception pulses (EI) whose chronological offset in c... | 07/01/2003 |
| 6483453 | Method for reducing transmit power for traffic alert and collision avoidance systems and airborne collision avoidance systems The present invention provides a method for efficient use of the transmit power of a Traffic Alert Collision Avoidance System (TCAS) that allows enhanced surveillance range and limits radio frequency (RF) interference in crowded airspace. The method reduc... | 11/19/2002 |
| 6420995 | Radar and IFF system A silent radar system which detects a target and its position without the countermeasure operator located at the target being able to detect the presence of the radar. The silent radar operates by transmitting signals with specific characteristics which a... | 07/16/2002 |
| 6348889 | Radar apparatus A vehicular radar apparatus comprising a radar beam transmission device and a reception device, and a processing unit for detecting the position of a target object from transmission signals and reception signals. The processing unit has a preceding vehicl... | 02/19/2002 |
| 6300897 | Stabilization in a radar level gauge A radar gauge adapted to sense fluid level in a tank and including a radar gauge circuit in which radar transmission and level sampling are controlled by a transmit frequency and a sample frequency respectively. A first frequency separation between first ... | 10/09/2001 |
| 6204801 | System and method for obtaining precise missile range information for semiactive missile systems A system (10) for determining the range between a missile (14) and a target (18) adapted for use with a semi-active missile system. The system (10) includes a first circuit (12) for generating a periodic signal (24) that is periodically frequency modulate... | 03/20/2001 |
| 6097331 | FM-CW radar system for measuring distance to and relative speed of target An FM-CW radar apparatus is provided which may be employed in automotive anti-collision or radar cruise control systems. The radar apparatus transmits as a radar wave a high-frequency signal which is so modulated in frequency with a modulating signal as t... | 08/01/2000 |
| 6094159 | Process for measuring distance with adaptive amplification A process for determining the distance between a distance sensor and an object, wherein an analog input signal is directed to a transmitter of the distance sensor. The transmitter emits a wave which is reflected by the object. A receiver of the distance s... | 07/25/2000 |
| 6008751 | Radar apparatus installed on vehicle for managing reflector information A radar apparatus installed on a vehicle includes a transmission section, a reception section and a processing section. The transmission section includes at least a transmission antenna, and emits a transmission wave toward a detection area in front of th... | 12/28/1999 |
| 5896102 | Swept range gate radar system for detection of nearby objects A cost-effective ultra-wideband radar system capable of locating nearby buried objects such as reinforcing steel rods, pipes, and other objects buried in concrete, soil, behind walls, or in the air. A sequence of ultra-wideband radar pulses e.g. at a plur... | 04/20/1999 |
| 5854603 | Ultra-wideband swept range gate radar system with variable transmitter delay A cost-effective ultra-wideband band radar system capable of locating nearby buried objects such as reinforcing steel rods, pipes, and other objects buried in concrete, soil, behind walls, or in the air. A sequence of ultra-wideband band radar pulses are ... | 12/29/1998 |
