Abstract:
PROBLEM TO BE SOLVED: To provide an orientation system which measures a positional change of an object, including a rotation for any or all of three axes, using linear accelerometers.SOLUTION: There is disclosed a method of using one linear accelerometer 23 to integrate two 3D linear accelerometers 20 and 20' in order to measure and supply six-dimensional information, that is, a translation in three dimensions and a rotation for three axes. Two linear accelerometer sensors are used to determine all but one of variables in six degrees of freedom. An output from a third accelerometer is used to generate data needed to determine six degrees of freedom of rotation. The need for a gyroscope for detecting a change in heading (i.e., yaw or azimuth) may therefore be avoided.
Abstract:
PROBLEM TO BE SOLVED: To provide a system and a method for acquiring signal acquisition auxiliary data.SOLUTION: The signal acquisition auxiliary data is acquired for a receiving device like a radio location place-supported position determination device which retrieves a signal from an arbitrary source like a satellite body and a base station. The data can be acquired from data acquired before based upon evaluation of change in parameter like time and position which possibly exerts a bad influence on validity. In some case, the data can be adjusted for the change in parameter. When acquisition auxiliary data provided by, especially, a remote entity includes a more distinct parameter than a generally provided one, data which is made more accurate can be calculated by a receiver using a partial measured value of a signal set. As long as a movement of a mobile station which cannot be corrected is detected and validity of previous data is kept, new data need not be acquired until the validity of the previous data expires because of a limit of extrapolation of time using a Doppler coefficient.
Abstract:
PROBLEM TO BE SOLVED: To collect and/or process sensor data from multiple sensors such as acceleration, angular-velocity, and magnetic-field sensors.SOLUTION: An embodiment includes an accelerometer 340 comprising a multi-sensor measurement processing unit 300, and an external geometric sensor 370 connected to the multi-sensor measurement processing unit 300. The multi-sensor measurement processing unit 300 detects movement based on sensor data from the accelerometer 340 and the geometric sensor 370, and compensates tilt of the geometric sensor 370 based on sensor data for rolls and pitches from the accelerometer 340.
Abstract:
PROBLEM TO BE SOLVED: To provide a multimodal list of transceiver devices to a remote terminal.SOLUTION: A positioning unit determines a location of a remote terminal. A processor identifies transceivers for communicating in at least a first communication mode and a second communication mode according to the location of the remote terminal. The processor retrieves information about the identified transceivers from a database and generates a multimodal list. The processor causes a transceiver to transmit the multimodal list of transceiver devices to the remote terminal using a communication mode of the remote terminal.
Abstract:
PROBLEM TO BE SOLVED: To provide methods and apparatuses for position determination and other operations in a combination of a cellular phone network and a satellite positioning system (SPS) in a mobile station.SOLUTION: A mobile station uses wireless signals from a plurality of wireless networks, for position determination, and obtains time and/or frequency information. Further, mobile stations are used to harvest statistical data about wireless access points, namely, the locations of mobile stations that have received signals from cellular base stations, wireless local area network access points, repeaters for positioning signals, or other wireless communication transmitters, and to derive location information, namely, position and service area of the wireless access points, for the wireless networks from the collected statistical data.
Abstract:
PROBLEM TO BE SOLVED: To provide an apparatus and method for achieving receiver diversity.SOLUTION: A wireless unit 400 includes a plurality of antennas 410, an antenna selector 430 to select one or more antennas from the plurality of antennas 410, and a processor 450 with input data from an inertial sensor 470 for monitoring the orientation of the wireless unit 400. Responsive to the input data from the inertial sensor 470, the processor 450 commands the antenna selector 430 to select one or more antennas. In one aspect, the processor 450 is a diversity processor that computes a combination of signals received on the antennas responsive to the input data from the inertial sensor 470. In another aspect, the wireless unit 400 further includes a baseband processor to process the output of the diversity processor for a particular unit application.
Abstract:
PROBLEM TO BE SOLVED: To provide a system and method to obtain signal acquisition assistance data.SOLUTION: Signal acquisition assistance data is obtained for receiving devices such as wireless position assisted location decision devices seeking signals from any source, such as satellite vehicles and base stations. The data may be obtained from previously acquired data, based upon evaluation of changes in parameters such as time and location that may jeopardize validity. In some cases, the data may be adjusted for the changes in parameters. Refined data may be calculated by a receiver using partial measurements of signal sets, particularly if the acquisition assistance data provided by a remote entity includes more distinct parameters than those which have typically been provided. New data need not be obtained until the validity of previous data expires due to limitations upon temporal extrapolation using Doppler coefficients, unless mobile station movement that cannot be compensated is detected, and jeopardizes validity of the previous data.
Abstract:
PROBLEM TO BE SOLVED: To provide a method and apparatus for improving radio location determination accuracy, in which available measurements are utilized to obtain a more accurate position estimate for a terminal.SOLUTION: An initial position estimate for a terminal 110 is first obtained (e.g., based on a cell-ID or an enhanced cell-ID solution). Measurements are obtained for the terminal. The initial position estimate is then updated with the measurements to obtain a revised position estimate for the terminal. The updating may be performed by (1) deriving a measurement vector based on the initial position estimate and the measurements, (2) forming an observation matrix for the measurements, (3) determining a matrix of weights, (4) deriving a correction vector based on the measurement vector, the observation matrix and the weight matrix, and (5) updating the initial position estimate with the correction vector.
Abstract:
PROBLEM TO BE SOLVED: To provide a method for measuring positional changes of an object including rotation about any or all of three axes using linear accelerometers. SOLUTION: There is disclosed a method of using a linear accelerometer to integrate two other 3D linear accelerometers 20 in order to measure and supply for further use six-dimensional information, that is, translation in three dimensions and rotation about three axes. Two linear accelerometer sensors are used to determine all but one of the variables in six degrees of freedom. An output from a third accelerometer 23 generates data needed to determine a sixth rotational degree of freedom. The need for a gyroscope for detecting changes in heading (i.e., yaw or azimuth) may therefore be avoided. COPYRIGHT: (C)2011,JPO&INPIT