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| Number | Title | Issue Date |
| 8102304 | Distance measuring equipment and distance measuring equipment monitor system A transponder (12) transmits a reply in response to an interrogation input thereto, the interrogation including twin pulses, and a monitoring processor (13) transmits to the transponder a pseudo interrogation identical in format to the interrogation, r... | 01/24/2012 |
| 8077073 | Pulse detecting equipment A pulse detecting equipment includes a log compression processor (105) for logarithm-converting signal levels of a reception signal received at an antenna and input therefrom, with maintained frequency components of the reception signal as input, an AD conver... | 12/13/2011 |
| 7969347 | Method for measuring distance and position using spread spectrum signal, and an equipment using the method By using the delay profile created by delay profile creating section 102 and the first threshold value 330 received from the first threshold value calculation 105, the first threshold value timing detection section 103 selects only the ea... | 06/28/2011 |
| 7868815 | Wireless distance measurement system and wireless distance measurement method A wireless distance measurement system and a wireless distance measurement method that measure the distance between a base station and a terminal without clock synchronization between a plurality of base stations, and without requiring input of the position relation... | 01/11/2011 |
| 7746269 | DME ground apparatus The transponder unit provided in a DME ground apparatus detects the transmission rate at which to transmit the pulse-pairs constituting a response signal. The threshold of the reception level of the pulse detection unit provided in the transponder unit is raised as ... | 06/29/2010 |
| 7683823 | DME ground apparatus A transponder unit of a DME ground apparatus receives an interrogation signal and converts the same to an IF signal. The unit performs analog-to-digital conversion on the IF signal, generating a digital interrogation signal. The unit calculates two detected outputs ... | 03/23/2010 |
| 7663532 | Method for measuring distance and position using spread spectrum signal, and an equipment using the method By using the delay profile created by delay profile creating section 102 and the first threshold value 330 received from the first threshold value calculation 105, the first threshold value timing detection section 103 selects only the ea... | 02/16/2010 |
| 7639174 | DME ground apparatus In a DME ground apparatus, under the control of a transmission-rate monitoring control unit, the transponder unit decodes an interrogation signal it has received and generates a response signal. The transmission rate at which to transmit the response signal is monit... | 12/29/2009 |
| 7636058 | Pulse signal transmitting apparatus, method of adjusting waveform of the same, and DME ground station apparatus A transmitting apparatus comprises a generator for generating a pulse signal having a waveform approximated to the Gaussian error function at a prescribed timing, a transmitter for power-amplifying a pulse signal generated by the generator, and transmitting the ampl... | 12/22/2009 |
| 7609197 | Method for measuring distance and position using spread spectrum signal, and an equipment using the method By using the delay profile created by delay profile creating section 102 and the first threshold value 330 received from the first threshold value calculation 105, the first threshold value timing detection section 103 selects only the ea... | 10/27/2009 |
| 7535405 | Method and apparatus for a multifunction radio A multifunction radio for receiving radio signals from and sending transmissions to multiple radio systems comprises an antenna and a transmit/receive switch coupled to the antenna. The radio further comprises a receiver section coupled to the transmit/receive switc... | 05/19/2009 |
| 7525474 | Integrated distance measuring equipment and transponder system and method A combined transponder and DME system for use in an aircraft. An L Band transmitter is shared between transponder and DME. ... | 04/28/2009 |
| 7432718 | Electronic device and method of controlling same An electronic device includes a main body, a drive mechanism configured to move the main body, a detector having a plurality of sensors mounted in the main body for detecting distances to an object which is present in a space around the main body, a calculator confi... | 10/07/2008 |
| 7373575 | Method and apparatus for generating expect data from a captured bit pattern, and memory device using same Expect data signals are generated for a series of applied data signals having a known sequence to determine if groups of the data signals were properly captured. A first group of the applied data signals is captured, and a group of expect data signals are generated ... | 05/13/2008 |
| 7362258 | Transponder detection system using radio and light wave signals A target object detection system for detecting a target object using a detector and a tag on the target object; the tag includes a radio wave receiver receiving radio wave from the detector; a light receiver receiving a light signal from the detector; a receipt sign... | 04/22/2008 |
| 7324040 | Method of automatically setting the gain of an interrogator receiver within a non-contacting identification system An attack is activated in a receiver amplifier of an interrogator whenever an amplified input signal exceeds an attack threshold voltage value Vatt, and the receiver amplifier at least during a waiting period, the length of which preferrably equals the double length... | 01/29/2008 |
| 7321777 | Wireless communications system including a wireless device locator and related methods A wireless communications system may include a plurality of wireless communications devices and a wireless device locator. More particularly, the wireless device locator may include at least one antenna and a transceiver connected thereto, and a controller for coope... | 01/22/2008 |
| 7315745 | Radio positioning systems The invention provides a method of estimating the time offsets between signals transmitted by plural transmitters of a communications network and received by a receiver attached to a terminal. In the method a section of a representation of the signals from the plura... | 01/01/2008 |
| 7315274 | Method and system for determining the position of marine vessels and similar objects A method for determining the relative position between two or more objects in a marine environment, including waterways, of which at least one object can be maneuvered relative to one or more other objects. At least one interrogator is arranged on one or more of the... | 01/01/2008 |
| 7292182 | Method of calibrating a microwave source The present invention relates to a method for calibrating the phase of a microwave source, in which: a calibration circuit is closed, the calibration circuit comprising an injection channel connected to a measurement channel via the source to be calibrated; a test s... | 11/06/2007 |
| 7280914 | Instrumented lock entry and traversing system An instrumented navigation system for aiding a towboat and barge configuration in the entry and traversal of a lock located on a waterway or for navigation around other structures, such as bridge piers or docks. The system consists of wirelessly linked computers on ... | 10/09/2007 |
| 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 |
| 7221308 | Joint stars embedded data link A system comprises a radar for producing a radar interrogation signal, a transponder for receiving the radar interrogation signal and producing a transponder signal including a first linear frequency modulated pulse having an increasing frequency and a second linear... | 05/22/2007 |
| 7218273 | Method and device for boresighting an antenna on a moving platform using a moving target A technique for boresighting an antenna mounted on a moving platform is described. The technique uses a concurrently moving calibration target. Target navigation data and platform navigation data are used to compensate for movement of the target and the platform. Th... | 05/15/2007 |
| 7218994 | Robot A robot for freely moving about in an environment where there is an obstacle. The robot includes a communication section transmitting by wireless an image taken by a camera to a base station, and via the base station to a communication terminal making a radio commun... | 05/15/2007 |
| 7161528 | Device and method for the suppression of pulsed wireless signals The invention relates to a method of suppressing pulsed signals in particular of DME or TACAN type present in the radio signals received (Ue) by a radio-frequency receiver, characterized in that the reception frequency band of the receiver is divided into frequency ... | 01/09/2007 |
| 7110779 | Wireless communications system including a wireless device locator and related methods A wireless communications system may include a plurality of wireless communications devices and a wireless device locator. More particularly, the wireless device locator may include at least one antenna and a transceiver connected thereto, and a controller for coope... | 09/19/2006 |
| 7068155 | Apparatus and methods for near object detection Methods and apparatus are provided for detecting an object in the projected path of a vehicle. The apparatus comprises a yaw sensor configured to determine the yaw of the vehicle and an object detection sensor configured to evaluate an Actual Range Bin and to produc... | 06/27/2006 |
| 7038589 | Systems and methods for tracking an object A portable apparatus to track an object includes a transmitter adapted to sending pulses of known duration and intensity; a receiver having one or more antennas to receive the pulses of known duration and intensity from the transmitter, the receiver and the transmit... | 05/02/2006 |
| 7023831 | CDMA mobile communications apparatus and base station detecting method used therefor To provide a CDMA mobile communications apparatus which can enhance a detection probability of a base station received with low power. A first threshold determination unit selects a peak correlation value output from a slot synchronizing unit based on a predetermine... | 04/04/2006 |
| 7006838 | System and method for locating sources of unknown wireless radio signals A system and method for determining the location of a source (target device) of a wireless radio signal of an unknown or arbitrary type for which a signal correlator is not known or available. The target device's signal is received at a plurality of known locations ... | 02/28/2006 |
| 6992615 | Method for verifying dynamically a multiple beam antenna placed on a vehicle A method for dynamically verifying a multiple beam antenna placed on a craft including a device for determining the position and course of the craft and a transmitter that via the antenna can emit pulsed signals. At least two transponders are placed in different dir... | 01/31/2006 |
| 6927725 | System and method for radar detection and calibration A system and method for radar detection and calibration. By measuring the true range of a calibration target on entry to the radar's detection zone, the actual detection capability of the radar in current atmospheric conditions with the actual radar can be determine... | 08/09/2005 |
| 6900753 | Method for measuring distance and position using spread spectrum signal, and an equipment using the method By using the delay profile created by delay profile creating section 102 and the first threshold value 330 received from the first threshold value calculation section 105, the first threshold value timing detection section 103 selects onl... | 05/31/2005 |
| 6812884 | Transceiver system and method utilizing nanosecond pulses A transceiver for short-pulse radar applications is disclosed in which a shift register or the like is used to collect return signal information in a manner to reduce the number of transmit pulses needed and to increase the speed of determining the positions of mult... | 11/02/2004 |
| 6745008 | Multi-frequency communication system and method A multi-frequency RFID remote communication system is provided that includes a plurality of RFID tags configured to receive a first signal and to return a second signal, the second signal having a first frequency component and a second frequency component, the secon... | 06/01/2004 |
| 6731908 | Distance measurement using half-duplex RF techniques A system, apparatus, and method for determining the distance between two objects using an indirect propagation delay measurement is disclosed. A frequency hopping scheme (such as the Bluetooth™ technology) is used to measure the relative phase offset of the receiv... | 05/04/2004 |
| 6686881 | Wireless identification and tracking using magnetic fields A method, apparatus, article of manufacture, and a memory structure for tracking assets. The method comprises the steps of generating a magnetic field at the base station, receiving a radio signal transmitted from the remote station disposed at a location... | 02/03/2004 |
| 6657579 | Method for measuring distance and position using spread spectrum signal, and an equipment using the method Under a multi-path environment, receive timing for the incoming wave of the minimum propagation delay time cannot be accurately measured using the prior art. By using the delay profile created by delay profile creating section 102 and the first threshold ... | 12/02/2003 |
| 6577238 | RFID detection system A system 100 is disclosed for monitoring the position of one or more RFID tags 201. The system has a detector 301 incorporating circuitry 304 for detecting changes in the range of an RFID tag 201 from the detector and for triggering an alarm 401 if a dete... | 06/10/2003 |
