Did You Know...
...that Thomas Edison's patent application on his phonograph was approved by the Patent Office in just seven weeks? In contrast, it took Gordon Gould, the inventor of the laser, 30 years to obtain his patent -- finally awarded in 1988!
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| Number | Title | Issue Date |
| 8405543 | Circuit and method for distance measurement between two nodes of a radio network A circuit of a node of a radio network, and a method for distance measurement with a transceiver for receiving a first signal with a first frequency by downmixing to an intermediate frequency, with a phase measurement unit, which is set up to determine a first value... | 03/26/2013 |
| 8334801 | System and method for real-time locating A locating system, includes at least one initiator configured to operate at a first clock frequency, and to transmit a measurement signal including a first preamble; and at least one transponder configured to operate at a second clock frequency, to receive the measu... | 12/18/2012 |
| 8279111 | Distance measuring system A high-precision distance measuring with a reduced error in a distance measuring system which calculates a distance from an arrival time of each pulse signal constituting a pulse sequence is provided. For an oscillator which generates pulse signals by counting the n... | 10/02/2012 |
| 8274426 | High-resolution, active reflector radio frequency ranging system A radio frequency ranging system is grounded in establishing and maintaining phase and frequency coherency of signals received by a slave unit from a master unit and retransmitted to the master unit by the slave unit. For a preferred embodiment of the invention, coh... | 09/25/2012 |
| 8081106 | Target ranging using information from two objects In an embodiment, an apparatus includes a detector, direction finder, receiver, and range finder. The detector is operable to detect a target, and the direction finder is operable to determine a first direction to the target from the apparatus. The receiver is opera... | 12/20/2011 |
| 7663535 | System and method to position register and phase synchronize a monitoring network A system is disclosed for position registration and phase synchronization of monitors in a monitor network. Each monitor includes a transceiver having a transponder circuit with a calibrated transponder delay. To measure a distance between monitors, an oscillator at... | 02/16/2010 |
| 7663536 | Apparatus and method for estimating distance using time of arrival A ranging apparatus includes a reference pulse generator generating a reference pulse having a first frequency at a first point in time of transmitting a ranging signal from a first device; a delay pulse generator generating a delay pulse signal having a second freq... | 02/16/2010 |
| 7570199 | Device and method for detecting overlap of pulse signals and apparatus for estimating distance using the same There is provided a device and method for detecting an overlap of pulse signals, capable of easily detecting a point where reference and delayed pulse signals overlap each other, and an apparatus for estimating a distance using the same. The device for detecting an ... | 08/04/2009 |
| 7504992 | Wireless system using continuous wave phase measurement for high-precision distance measurement A system and method for monitoring topological changes in a defined area. A grid of sensors is arranged in the area, with known distances between them. The sensors communicate wirelessly with a host computer, which individually addresses each sensor to instruct that... | 03/17/2009 |
| 7423576 | System and method for radar tracking using communications packets According to the invention, IEEE 802.15.4a packets are used for communications, ranging and passive radar (detecting changes/motions, tracking objects in the environment) functionality. Changes and motions in the environment are detected by exploiting the specific p... | 09/09/2008 |
| 7417581 | System and method for intrusion detection using a time domain radar array A system and method for highly selective intrusion detection using a sparse array of time modulated ultra wideband (TM-UWB) radars. Two or more TM-UWB radars are arranged in a sparse array around the perimeter of a building. Each TM-UWB radar transmits ultra wideban... | 08/26/2008 |
| 7414571 | Low frequency asset tag tracking system and method An apparatus and method for low frequency asset tracking includes a low frequency transmitter tag associated with a cargo container or other high value commodity, a plurality of receivers that detect low frequency signals, and a microprocessor that uses algorithms a... | 08/19/2008 |
| 7369083 | Method for performing bistatic radar functions A bistatic radar system having a transmitter that generates unique signals at spatially independent transmitter degrees of freedom and a receiver that filters the signal at each receiver degree of freedom into a group of signals identical in number to the number of ... | 05/06/2008 |
| 7358888 | System and method for intrusion detection using a time domain radar array A system and method for highly selective intrusion detection using a sparse array of time modulated ultra wideband (TM-UWB) radars. Two or more TM-UWB radars are arranged in a sparse array around the perimeter of a building. Each TM-UWB radar transmits ultra wideban... | 04/15/2008 |
| 7327306 | RF system for tracking objects A system for tracking an object in space for position, comprises a transponder device connectable to the object. The transponder device has one or several transponder aerial(s) and a transponder circuit connected to the transponder aerial for receiving an RF signal ... | 02/05/2008 |
| 7309002 | Differential radio frequency identification reader Systems and techniques for reading a radio frequency identification transponder are described. A transmit coil produces a transmit field to power and interrogate the transponder. A reference coil and a receive coil furnish inputs to a differential amplifier, balance... | 12/18/2007 |
| 7304601 | Device and a method for accurate radar level gauging The invention discloses a device for using radar signals to measure the vertical distance (h) to a surface, comprising a first transmitter and a first transmitting antenna for transmitting radar signals, and a first receiver and a first receiving antenna for receivi... | 12/04/2007 |
| 7304609 | Hybrid wireless ranging system and associated methods A wireless ranging system includes a first wireless unit and a second wireless unit spaced therefrom. The first wireless unit may include a time-of-arrival (TOA) wireless transmitter, and a near-field electromagnetic (NFE) wireless transmitter having a settable oper... | 12/04/2007 |
| 7298314 | Near field electromagnetic positioning system and method A system and method for electromagnetic position determination utilizing a calibration process. For calibration, a transmitter is positioned at multiple locations in an area of interest and multiple receivers receive and record signal characteristics from the transm... | 11/20/2007 |
| 7295111 | Microwave detection system and method for detecting intrusion to an off-limits zone A system and method are provided for automatically detecting intrusion in an off-limits zone. The system includes a transmitter transmitting a signal along a path likely to encounter an intruder to the off-limits zone and a modulating reflector for receiving the tra... | 11/13/2007 |
| 7283087 | Radar having a transmission oscillator which can be excited quasi-phase coherently by an evaluation oscillator A radar is provided with transmitting means for transmitting a signal and with receiving means for receiving a reflection of the transmitted signal. The inventive radar is characterized in that the transmitting means is provided with a transmitting oscillator and th... | 10/16/2007 |
| 7283926 | Counter circuits and distance estimation methods Counting circuits applied to distance estimation for ultra wideband (UWB) application, in which a first counting unit generates a sequence of pseudo-random number series not including zero, a first recoding unit records a first series and a second series from the se... | 10/16/2007 |
| 7277044 | System and method for adaptive broadcast radar system A method for transmitting a signal waveform from a transmitter within an adaptive broadcast radar system. In one embodiment, wherein the transmitter comprises at least one sub-aperture, the method includes: generating the signal waveform at the at least one sub-aper... | 10/02/2007 |
| 7268723 | System and method for locating targets using measurements from a space based radar A system and method for determining a position of a target within an acceptable tolerance using an iterative approach. A airborne or space-based measuring device is used to measure an estimated position of the target. The information from the measuring device is use... | 09/11/2007 |
| 7257413 | Dynamic location almanac for wireless base stations A system and method of dynamically updating an almanac of base stations with wireless phones that are controlled by end users. First, second, and third location information are received respectfully from a first, second, and third wireless phones. A position of each... | 08/14/2007 |
| 7250772 | Method and apparatus for characterizing a signal path carrying an operational signal A method of characterizing a signal path includes (i) generating a reference spread-spectrum signal; (ii) coupling the reference spread-spectrum signal into the signal path while the signal path is carrying an operational signal; (iii) receiving a reflected spread-s... | 07/31/2007 |
| 7248210 | Man-portable counter mortar radar system The present invention is a man-portable counter-mortar radar (MCMR) radar system that detects and tracks enemy mortar projectiles in flight and calculates their point of origin (launch point) to enable and direct countermeasures against the mortar and its personnel.... | 07/24/2007 |
| 7245252 | Method for determining the distance between two transmitting and receiving stations In a method for determining the distance between two transmitting and receiving stations, a transmission signal is generated in each station and is transmitted as a series of microwave pulses having a predefined pulse repetition frequency to the other respective sta... | 07/17/2007 |
| 7228228 | Tag tracking The present invention provides a tracking system in which a mobile tag having an unknown position, which tag is to be tracked in space over time, transmits a signal comprising a pair of tones at different frequencies. The transmitted signal is received at each of th... | 06/05/2007 |
| 7215412 | Flagpole reflectors for laser range finders A system and method are provided for determining a distance to a target. The method includes sending light, at a first time, to a light reflector mounted in a reflector device, receiving light reflected from the light reflector at a second time, and determining the ... | 05/08/2007 |
| 7209071 | System and method for distance measurement A system and method for performing distance measurement using wireless signals. A time of flight calculation is enabled by an interrogating device that transmits an interrogation signal to a responding device, which returns a synchronized signal back to the interrog... | 04/24/2007 |
| 7205930 | Instantaneous 3—D target location resolution utilizing only bistatic range measurement in a multistatic system A multistatic radar has a radar transmitter for illuminating a target with a radar signal. The target reflects the radar signal to three separate radar receivers, each performing a bistatic range measurement to the target. The three bistatic range measurements are c... | 04/17/2007 |
| 7205931 | Method for determining the distance between a base station and a mobile object, in addition to a base station and identification system for a method of this type A method for determining the distance between a base station (SLG) and a mobile object (DT1–DT3). A HF carrier frequency and an offset frequency (df) are predetermined for a QAM modulation. The HF carrier frequency is increased and decreased by the o... | 04/17/2007 |
| 7196654 | Vehicle positioning and tracking radar system A vehicle positioning and tracking radar system includes a rotating antenna with a pair of spatially separated transmit feeds for simultaneously transmitting a pair of frequency-modulated continuous-wave (FMCW) electromagnetic signals having a first polarisation and... | 03/27/2007 |
| 7173528 | System and method for disabling data on radio frequency identification tags The disclosed embodiments of the present invention are used to permanently disable or destruct an RFID so that it is no longer possible to read some or all of the data encoded on the RFID tag. In one method for disabling data on a radio frequency identification (RFI... | 02/06/2007 |
| 7170408 | System and method for information assimilation and functionality control based on positioning information obtained by impulse radio means A system and method for information assimilation and functionality control based on positioning information obtained by impulse radio techniques, which utilizes the position information and communication abilities inherent in impulse radio technology to correlate po... | 01/30/2007 |
| 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 |
| 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 |
| 7138941 | In-situ calibration of radar frequency measurement Frequency calibration of a bi-static type of radar system is performed by positioning radar transmitter and receiver in spaced relation to each other over a targeted seawater surface from which radar radiation along a forward radiation scattering path is reflected t... | 11/21/2006 |
| 7129886 | System and method for detecting an intruder using impulse radio technology An intrusion detection system and method are provided that can utilize impulse radio technology to detect when an intruder has entered a protection zone. In addition, the intrusion detection system and method can utilize impulse radio technology to determine a locat... | 10/31/2006 |
