Quotables
"Rail travel at high speeds is not possible because passengers, unable to breathe, would die of asphyxia."
Dionysius Lardner, Professor of Natural Philosophy and Astronomy at University College, London ; 1830
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| Number | Title | Issue Date |
| 8149161 | Method and system for azimuthal containment using largest gap method A maximum gap method and system provide for identifying a space sector within which a system capable of engaging an object, should search for the object. A detector system that may be a radar or other active range determination system tracks position of the moving o... | 04/03/2012 |
| 7688255 | Electronic scanning radar apparatus An electronic scanning radar apparatus has a cutting portion for cutting receiving data which is comprised of N numbers of data for each channel into two more short time data having M ( | 03/30/2010 |
| 7675457 | Radar system A radar system transmits a beam of detection radio waves with a predetermined azimuth width, receives a reflected wave from a target, changes a central azimuth of the beam, and detects the distribution of reception signal strengths at predetermined angular intervals... | 03/09/2010 |
| 7663537 | Target detecting apparatus using electronically agile radar A target detecting apparatus mounted on a vehicle has an electronically agile radar detecting a beat signal indicating a difference in frequency between transmission and reception signals and producing a time series of N reception data from the beat signal, a determ... | 02/16/2010 |
| 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 ADS-B transmitter and encoder, a phase modulator including a digital synt... | 08/19/2008 |
| 7379015 | First responder positioning apparatus A positioning system for tracking the location of a first responder emergency worker. The system includes mobile enabler units and a personnel badge having a ranging transponder. Two enabler units can use two-way ranging signals, a prescribed turn around time and di... | 05/27/2008 |
| 7365676 | Sensor for transmitting and receiving electromagnetic signals The invention relates to a sensor comprising a housing, inside of which a transmitting antenna array that transmits electromagnetic transmission signals in a radiation area and a receiving antenna array that receives received signals reflected by at least one object... | 04/29/2008 |
| 7345621 | Real-time multistatic radar signal processing system and method A real-time signal processing engine robustly detects, localizes, tracks and classifies ground targets based on radar signals from a multistatic radar system. The system differentiates between different targets based on an optimized cost function, which can include ... | 03/18/2008 |
| 7304602 | Axial deviation determining method for on-vehicle radar An on-vehicle radar and a method of determining an axial deviation of the radar using stationary objects free of erroneous determination are disclosed. The amount of axial deviation of the radar is determined from the calculated stationary object line based on the d... | 12/04/2007 |
| 7292179 | Instantaneous passive range finding A method and apparatus for use in determining the range in a single time sample from a platform to a target are disclosed. The method includes receiving radiation emanating from the target at two points on the platform in a common time sample; detecting the received... | 11/06/2007 |
| 7277046 | Single transmit multi-receiver modulation radar, multi-modulation receiver and method A single transmit multi-receiver modulation radar modulates radar return signals received through an associated receive-signal path with one of a plurality of differing modulation waveforms having low-cross correlation products. Each receive-signal path may be assoc... | 10/02/2007 |
| 7248206 | Instantaneous multisensor angular bias autoregistration Unknown alignment biases of sensors of a tracking system are estimated by an iterative Kalman filter method. Current measurements are corrected for known alignment errors and previously estimated alignment biases. The filter time reference is updated to produce esti... | 07/24/2007 |
| 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 horizontal direction, operating the radar altimeter to generate a Doppler fr... | 07/24/2007 |
| 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 |
| 7227474 | Object detection system: zone matching and programmability The object detection system includes an object sensor and a controller. The controller is configured to compare a sensed range of an object with a range gate based on the azimuth angle of the object. The range gate for each azimuth angle is programmable and is selec... | 06/05/2007 |
| 7221310 | Electric wave axis adjusting apparatus for radar mounted on vehicle The present invention provides an electric wave axis adjusting apparatus for an on-vehicle radar capable of readily and precisely adjusting an electric wave axis only by making the scanning range and a detection range identical to each other and changing a scanning ... | 05/22/2007 |
| 7205932 | Method and apparatus for improved determination of range and angle of arrival utilizing a two tone CW radar An improved system is provided for aiming a shotgun-based or other countermeasure system so as to be able to countermeasure incoming rockets or projectiles. In one embodiment a shotgun aimed and controlled by the subject system projects a pattern of pellets to inter... | 04/17/2007 |
| 7199750 | Real-time multistatic radar signal processing system and method A real-time signal processing engine robustly detects, localizes, tracks and classifies ground targets based on radar signals from a multistatic radar system. The system differentiates between different targets based on an optimized cost function, which can include ... | 04/03/2007 |
| 7190305 | Radar apparatus In a radar apparatus, a receiving antenna includes a plurality of antenna elements, each receiving, as a reception signal, radio waves emitted into space and reflected off a target object. An analog signal is obtained by downconverting and putting a bandwidth constr... | 03/13/2007 |
| 7190306 | Method and system for detecting with radar the passage by a vehicle of a point for monitoring on a road The invention relates to a method for detecting the passage by a vehicle of a determined point for monitoring on a road, wherein from a remotely situated location a radar beam is transmitted continuously to the point for monitoring, reflections from the transmitted ... | 03/13/2007 |
| 7187320 | Matched maneuver detector A target tracking arrangement predicts the state of a target. The predictor may be a Kalman filter. In the presence of a target which is maneuvering, the prediction may be in error. A maneuver detector is coupled to receive residuals representing the difference betw... | 03/06/2007 |
| 7176830 | Image processing system for mounting to a vehicle An image processing system to be mounted to a vehicle includes a radar adapted to measure distance and direction to an object based on reflected electromagnetic waves which are outputted to scan the exterior of the vehicle, an image-taking device such as a camera fo... | 02/13/2007 |
| 7148802 | Direction finder and locator A direction finder is disclosed that is a hand-held device used to locate a vehicle in a parking lot using a two way radio link, operating in an unlicensed freely available band of the radio spectrum. Made for outdoor use, it is independent of GPS systems, cellular ... | 12/12/2006 |
| 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 illuminates a target along an indirect path with an encoded radar signal. The... | 12/12/2006 |
| 7131325 | Radar level gauge system with intermittent amplification A radar level gauge system is disclosed, comprising: a transmitter for transmitting pulsed measuring signals into a tank; a receiver for receiving echo signals from the tank; and processing circuitry for processing the received echo signals, said processing means in... | 11/07/2006 |
| 7132976 | Automotive radar An automotive radar which can process signals at high speed to detect a target in a wide angle range is provided. The automotive radar comprises a transmitting antenna which emits an electromagnetic wave, two receiving antennas which receive the electromagnetic wave... | 11/07/2006 |
| 7130602 | Dynamically programmable receiver Disclosed is a novel and improved dynamically programmable linear receiver which provides the required level of system performance with reduced power consumption. In one embodiment, disclosed is a programmable receiver coupled to a jammer detector for detecting the ... | 10/31/2006 |
| 7123184 | Transmit-receive FM-CW radar apparatus A transmit-receive FM-CW radar apparatus according to one mode of the invention comprises: a mixer for downconverting an IF signal; a switch provided on the input side of the mixer; and a switch controller for controlling the switch on and off in different modes and... | 10/17/2006 |
| 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 |
| 7062381 | Method and system for determining relative position of mobile vehicles A primary transceiver of a primary vehicle transmits a first transmission signal to a first transponder and a second transponder associated with a secondary vehicle. A first transponder antenna and a second transponder antenna are associated with secondary vehicular... | 06/13/2006 |
| 7046190 | Process for phase-derived range measurements A method and apparatus for determining range of a radar target is provided. Signal samples based on returns of a target during tracking are processed to produce a wideband envelope range estimate for components of target motion. The components of target motion inclu... | 05/16/2006 |
| 7026976 | Radar apparatus having function of estimating target's width In a radar apparatus, when the width of a target cannot be determined, the width is estimated in such a manner as not to erroneously identify the lane in which the target is traveling. Denoting the actual width of the target by D, the distance to the target by R, an... | 04/11/2006 |
| 6956523 | Method and apparatus for remotely deriving the velocity vector of an in-flight ballistic projectile A system and method for rapidly determining the source of an incoming projectile applies controlled, active RF energy source(s) to illuminate a target area/projectile, and exploits Doppler induced frequency shifts from multiple receivers to develop a vector solution... | 10/18/2005 |
| 6940447 | Radar device and method for operating a radar device A radar device having means for generating a carrier-frequency signal, means for shaping pulses, means for generating modulated radar pulses from the carrier-frequency signal, means for emitting modulated signals as radar pulses, means for receiving radar pulses and... | 09/06/2005 |
| 6924762 | Radar designed to acquire radar data with high accuracy A radar is provided which transmits a radar wave whose frequency is so modulated as to rise, fall, and be kept constant cyclically. The radar uses beat signals produced by the radar wave and radar echoes received by two antennas to produce radar data on a target. Wh... | 08/02/2005 |
| 6911934 | Apparatus, method and articles of manufacture for sequential lobing high resolution radar A sensor front end that is able to discriminate objects based on their range from the sensor and to derive bearing information therefrom. The sensor system may include a signal source for generating source signal; an antenna system for transmitting the source signal... | 06/28/2005 |
| 6859164 | Detecting system In a position detecting system used to monitor a suspicious person and to give an alarm by using a radar which transmits/receives a microwave or a millimeterwave, the shape of a detectable area of the radar and that of the area to be monitored are not always equal t... | 02/22/2005 |
| 6819285 | Monopulse radar system for determining the height of a target An improved method of estimating target elevation angle for dual squinted beam radar systems is disclosed. The target's elevation angle is estimated by receiving complex I/Q data from two receive radar beams and calculating the complex ratio of the complex I/Q data.... | 11/16/2004 |
| 6801152 | Method for determining the optimum observer heading change in bearings-only passive emitter tracking Emitter target range and heading are estimated from bearing measurements enhancing bearings-only estimator convergence to a target track, and permitting optimization of an observer position relative to the target at the end of the total bearing measurement period. O... | 10/05/2004 |
| 6771205 | Shipboard point defense system and elements therefor A combined defense and navigational system on a naval vessel is disclosed. The disclosed system includes a track-while-scan pulse radar which is controlled to provide either navigational information or tracking information on selected targets. Additionally, the disc... | 08/03/2004 |
