Did You Know...
...that when IBM conducted a market study of Chester Carlson's invention in 1959, the company concluded that it would take only 5000 units of his new product to saturate the market? IBM therefore declined to be part of the new product introduction. Too bad for IBM. Carlson's invention was the xerography process, and his new product was the beginning of the Xerox Corporation. It is estimated that every day, worldwide, 3,000,000,000 copies are made!!
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| Number | Title | Issue Date |
| 8179321 | Context sensitive mobile device utilization tracking A method and apparatus for generating context sensitive mobile device utilization data. The method comprises retrieving mobile device utilization data from a mobile device utilization and tracking device, retrieving location data from the tracking device, retrieving... | 05/15/2012 |
| 7965236 | Apparatus and method for measuring moving distance in mobile communication system An apparatus and a method for measuring a moving distance in a mobile communication terminal. A Doppler frequency over a time interval for measuring a moving speed of the Doppler frequency is measured or calculated. The moving speed is calculated. The moving distanc... | 06/21/2011 |
| 7956809 | Method and device for determining the speed of a moving entity A method and a corresponding device determines the speed of a moving entity carrying at least two antennas for receiving a transmission signal the antennas being displaced at a predetermined distance. In order to provide a more simple and accurate method which can b... | 06/07/2011 |
| 7541976 | System and/or method for estimating speed of a transmitting object The subject matter disclosed herein relates to techniques for estimating a speed of an object that transmits a signal at a carrier frequency. An apparatus and method disclosed herein includes receiving at an array of multiple antenna elements a radio frequency signa... | 06/02/2009 |
| 7362270 | System and method to perform network node localization training using a mobile node A method and system for determining a location of at least one stationary node of a wireless network, which includes providing a predetermined path within a geographic space of the wireless network, prior to localization, moving a mobile node along the predetermined... | 04/22/2008 |
| 7350343 | System for automatically steering a utility vehicle A system for automatically steering a utility vehicle having an operating implement. The system comprises a controller that is in communication with a scanning sensor. The controller receives an output signal from the scanning sensor and generates a steering signal ... | 04/01/2008 |
| 7327715 | Radio communication system A radio communication system comprises a primary station adapted to transmit a series of data packets on a downlink channel to a secondary station. The primary station determines a property relating to the Doppler spread of the downlink channel and uses this propert... | 02/05/2008 |
| 7302267 | Apparatus and method for estimating a velocity of a mobile terminal in a mobile communication system A Base Station (BS) apparatus for estimating a velocity of a Mobile Station (MS) in a mobile communication system includes a channel estimator for performing channel estimation according to a velocity band, receiving a wireless channel signal from the MS, and perfor... | 11/27/2007 |
| 7257417 | Method for determining a change in a communication signal and using this information to improve SPS signal reception and processing Methods and apparatuses for determining a position of a mobile satellite positioning system (SPS) receiver which is coupled to a communication receiver or transceiver. In one exemplary method, a change in a communication signal received by the communication receiver... | 08/14/2007 |
| 7142850 | Radio estimation method of a mobile station velocity The invention relates to a method of estimating the speed (v) of a mobile station connected by a radio transmission channel to a remote station, said method including the following successive steps: receiving and filtering a transmission signal (s) to obtain a measu... | 11/28/2006 |
| 6930638 | Passive moving object detection system and method using signals transmitted by a mobile telephone station A passive object detection system (1) comprises first and second antennas (4, 6) and a processor (8). The first antenna (4) is adapted to receive a signal transmitted by a mobile telephone base station; the second antenna (6) is ad... | 08/16/2005 |
| 6879920 | Method and system for estimating movement speed of mobile unit The present invention is related to a method for estimating a movement speed of a mobile unit in a mobile radio communication system. First, the present invention receives a first signal from the mobile unit. Then, the system calculates an envelope of the first sign... | 04/12/2005 |
| 6611688 | Position reporting method for a mobile terminal in a mobile communication network A mobile terminal reports its position to the mobile communication network on a regular and unsolicited basis. Position reports are combined with data, such as channel quality measurements or packet data, that is otherwise being transmitted by the mobile ... | 08/26/2003 |
| 6441777 | Signal structure and processing technique for providing highly precise position, velocity, time and attitude information with particular application to navigation satellite systems including GPS In a GPS or similar radionavigation signal, a pair of coarse/acquisition signals are located at, near or toward the nulls of the precision/encrypted codes in the L1 band, the L2 band or both. The resulting difference in frequency provides a very wide lane... | 08/27/2002 |
| 6172639 | Signal structure and processing technique for providing highly precise position, velocity, time and attitude information with particular application to navigation satellite systems including GPS In a GPS or similar radionavigation signal, a pair of coarse/acquisition signals are located at, near or toward the nulls of the precision/encrypted codes in the L1 band, the L2 band or both. The resulting difference in frequency provides a very wide lane... | 01/09/2001 |
| 6061625 | Process for obtaining traffic data A process for obtaining traffic situation data in a compressed form, while largely maintaining the reliability of the data, whereby a speed profile for a vehicle that moves in traffic and belongs to a sampling vehicle fleet ("floating car") is found and t... | 05/09/2000 |
| 6011515 | System for measuring average speed and traffic volume on a roadway A vehicular traffic sensor capable of measuring traffic speed and volume in all weather conditions and at a low installed cost. The sensor makes use of multi-path interference of ambient radio frequency (RF) signals. The ambient RF signals can be, for exa... | 01/04/2000 |
| 5686925 | System for obtaining a velocity of a moving object from a speed sensor with an improved adjustment of a speed conversion coefficient A speed conversion coefficient calculating section 104 calculates a ratio of a GPS Doppler velocity calculated by a GPS velocity calculating section 101 to a vehicle speed measured by a speed sensor 102, thereby obtaining a speed conversion coefficient. T... | 11/11/1997 |
| 5585805 | Travel velocity detecting apparatus in mobile communication system A travel velocity detector is installed in a mobile telephone station such as a portable telephone or a car telephone. The travel velocity detector adapts a received power level to a travel velocity of the mobile station. Two receiving circuits receive co... | 12/17/1996 |
| 5570096 | Method and system for tracking satellites to locate unknown transmitting accurately A satellite tracking system, including a terrestrial transmitter, a plurality of terrestrial receivers, and a controller/analyzer, operates in two modes. In an active mode, the transmitter emits a tracking signal within a spread spectrum to a satellite an... | 10/29/1996 |
| 5420883 | Train location and control using spread spectrum radio communications Communication devices and communication network techniques are employed to meet safety-critical, operational requirements for train location and control in railroad and public transit applications. On-board and trackside communication radios participate i... | 05/30/1995 |
| 5132695 | Radio navigation system A radio navigation system including: a means to determine, at a point (M1) of the trajectory of a moving body to be localized, the speed vector of said moving body and, possible, the "n" order derivatives of said speed vector (with n>1), a means to ... | 07/21/1992 |
| 5055849 | Method and device for measuring velocity of target by utilizing doppler shift of electromagnetic radiation A method for measuring the velocity (v) of a moving target (A). Radio signals are transmitted by means of radio transmitter-receiver arrangements of both the measuring station (B) and the target station (A) and received at the opposite stations (A,B), the... | 10/08/1991 |
| 4903212 | GPS/self-contained combination type navigation system In a global positioning system (GPS)/self-contained combination type navigation system for a vehicle, the GPS navigation data are received by the GPS antenna of the navigation system which are simultaneously transmitted from more than 3 pieces of satellit... | 02/20/1990 |
| 4876550 | Ridge regression signal processing for position-fix navigation systems A position estimator for determining the position and velocity of a moving platform in cooperation with radio navigation aids is described incorporating an unbiased estimator, such as a least means square estimator, a biased estimator for determining the ... | 10/24/1989 |
| 4754283 | Codeless GPS sonde Windfinding apparatus is described in which receiver processing of the Global Positioning System (GPS) signals is without knowledge of the spread spectrum codes. The apparatus receiver ignores the bi-phase code and recovers the carrier frequency of all sa... | 06/28/1988 |
| 4731613 | Positioning system for a vehicle An improved positioning system for a vehicle is shown. In the system, when radio wave can be received from only one satellite, the current position of the vehicle is computed based on a pair of navigational data, which are brought by radio wave received a... | 03/15/1988 |
| 4502052 | Passive data acquisition and analysis system for microwave A passive data determination system (10) for use in a traveling projectile (12) is provided including a logarithmic receiver (20) for receiving a power signal Pr from a source target (14) and emitting in response thereto an output voltage signa... | 02/26/1985 |
| 4433334 | Passive ranging system Range and velocity of target vehicles are determined from the angles of arrival of strobes from the target vehicles to provide a completely passive, linear, ranging system. From inputs which include strobe angle, time of strobe and receiving vehicle cross... | 02/21/1984 |
| 4369444 | Multipath Doppler shift vertical speed measurement system A radar system for measuring the vertical component of velocity of a target uses the differences in Doppler frequency between the direct and multipath radar returns. The system filters from this difference a component caused by the targets relative radial... | 01/18/1983 |
| 4167330 | Velocity measuring system The relative transverse velocity between a local station and a zone of reference or observation is measured by providing first and second directional radiation receiving devices at the local station, such devices being aimed along parallel paths extending... | 09/11/1979 |
| 4134118 | Aircraft antenna-switching arrangements A control system for an aircraft radio-navigation installation having forward-looking and rearward-looking antennas. The system provides the usual diversity reception facilities of "hunting" and then locking on to one antenna when an acceptable signal is ... | 01/09/1979 |
| 4131891 | Passive microwave velocity sensor A passive microwave velocity sensor uses the natural radiation from the terrain to determine ground velocity independent of altitude. The sensor employs two radiometric interferometers, which analyze inputs from two pairs of receiving antennas aligned alo... | 12/26/1978 |
| 4114156 | Frequency shift rate detector 2. A doppler shift rate detector system comprising: a first mixer; input ns for simultaneously applying a carrier signal and a doppler shifted sideband signal to said first mixer; first and second intermediate frequency amplifiers coupled to said first m... | 09/12/1978 |
| 4106093 | Ground speed deriving circuit A circuit for generating a signal proportional to the ground speed and track angle of an aircraft derives a signal from a node in a coherent or vector filter having a position vector input and output. The filter utilizes at least two integrators which int... | 08/08/1978 |
| 4071898 | Ship performance analyzer A system designed to periodically obtain a precise measure of the impact of all factors which may be degrading a ship's operational performance. A complete trial of a ship consists of several test runs of the ship in opposite directions during which the p... | 01/31/1978 |
| 4063240 | Electronic docking system An electronic docking system utilizing a multiplicity of sensing subsystems to derive and display docking parameters during the docking operation is disclosed. The parameters displayed include bow and stern velocities ship's velocity perpendicular and par... | 12/13/1977 |
| 3944968 | Aircraft ground proximity warning system having speed versus altitude compensation The warning system includes a function generator for generating a signal representative of a minimum altitude over terrain as a function of the aircraft's speed. This signal is combined with a signal representing the aircraft's actual altitude over the te... | 03/16/1976 |
