Patent application number | Description | Published |
20080319708 | Apparatus and Method For Estimating Virtual Axis Magnetic Compass Data to Compensate the Tilt Error of Biaxial Magnetic Compass, and Apparatus For Calculating Azimuth Based on the Same - Provided is an apparatus for estimating virtual axis geomagnetic data using a 2-axis geomagnetic sensor and an inclinometer, including a geomagnetic data normalizing unit for normalizing 2-axis geomagnetic data measured by the 2-axis geomagnetic sensor, a tilt angle calculator for calculating a tilt angle of the 2-axis geomagnetic sensor by using tilt information measured by the inclinometer, and a virtual axis geomagnetic data estimator for determining a magnitude of virtual geomagnetic data with respect to a virtual axis by using the normalized 2-axis geomagnetic data, and determining a sign of the virtual geomagnetic data based on the normalized 2-axis geomagnetic data, the calculated tilt angle and a dip angle to thereby estimate the virtual geomagnetic data. | 12-25-2008 |
20090291693 | METHOD FOR ESTIMATING POSITION OF MOBILE TERMINAL IN WIRELESS NETWORK - Provided is a method for estimating a position of a mobile terminal in a wireless network. In the method according to the present invention, difference values between squared signal arrival times of base stations are used to estimate the position of the mobile terminal. | 11-26-2009 |
20100106745 | METHOD AND APPARATUS FOR GENERATING FINGERPRINT DATABASE FOR WIRELESS LOCATION - Provided is a fingerprint database generating method and device for wireless location. Signal strength is estimated by using access points on a numerical map, position coordinates of grid points, and a radio wave attenuation model so as to generate a fingerprint database. A simulation error is computed based on actual survey data measured in the real space, and the estimated signal strength is corrected by using the computed simulation error to thus generate a fingerprint database. | 04-29-2010 |
20100136999 | APPARATUS AND METHOD FOR DETERMINING POSITION OF TERMINAL - An apparatus for determining a position of a terminal calculates distances between a terminal and a plurality of base stations by using time information acquired by a reference station among the plurality of base stations through unidirectional communication between the terminal and the base stations and between the base stations, and determines a position of the terminal by using the calculated distances. | 06-03-2010 |
20100137001 | TERMINAL AND METHOD FOR PROVIDING TERMINAL POSITION - The present invention relates to a terminal and a terminal location providing method. The terminal for selectively accessing a plurality of base stations supporting different communication systems includes a first network interface card that is turned on when the terminal is turned on, a second network interface card that is turned on or activated when receiving the terminal's location information request, a power controller for controlling power of the first and second network interface cards, and a processor for receiving the terminal's location information request and controlling the power of the first and second network interface cards through the power controller. | 06-03-2010 |
20100150061 | Device and method for arranging access point in wireless location - Provided are an access point arrangement device and a method for wireless location determination. An access point is arranged on a numerical map, received signal strength of a signal received from the access point for each grid point is calculated, and DOP and position error per grid point are calculated by using the received signal strength per grid point. It is determined whether to rearrange the currently arranged access point based on a ratio of a grid point with DOP less than a threshold value for entire grid points on the numerical map and a ratio of a grid point with a position error that is less than a threshold value. | 06-17-2010 |
20100166047 | METHOD FOR DETECTING SATELLITE NAVIGATION RECEIVED SIGNAL AND APPARATUS THEREOF - Provided are a method for detecting a received signal and an apparatus for detecting a satellite navigation received signal using the same. The present invention provides cells where a correlation value obtained through parallel signal detection is a predetermined signal detection threshold value or more are selected and time domain correlation is performed on the cells so that the correlation value is verified. The cells having the predetermined verified threshold value or more are detected as a final received signal. | 07-01-2010 |
20100238048 | APPARATUS AND METHOD FOR GENERATING LOCATION INFORMATION - An apparatus for generating location information transmits an SUPL INIT message for measuring a location to a target terminal so as to position the target terminal. The target terminal transmits an SUPL POS INIT message including RFID tag information to the apparatus. The apparatus determines a positioning method of the target terminal by using RFID tag information, generates the location of the target terminal according to the determined positioning method, and transmits the location to a service user. | 09-23-2010 |
20100265092 | METHOD FOR DETERMINING LOCATION USING ACCESS POINT, AND APPARATUS THEREOF - The present invention relates to a location measuring method using an access point, and an apparatus using the same. According to the present invention, a location of a terminal is estimated by using a signal strength received from an access point installed at a known position in a wireless network, and location of the access point installed at an unknown position is estimated by using a signal strength received from the access point installed in the unknown position and estimated location information of the terminal. In addition, a location of the terminal is finally calculated by using estimated location information of the access point installed at the known position. As described, the location of the terminal is determined by using estimated location information of an AP that is randomly installed by a user (that is, installed at an unknown position), and therefore a location of an AP installed in an area where it is difficult to measure and availability of location measurement can be improved. In addition, a signal strength measurement value, estimation location information of an AP installed at a known position, and estimation location information of an AP installed at an unknown position are used for location information calculation of a terminal, and accordingly, accuracy of the location measure can be improved. | 10-21-2010 |
20100265093 | METHOD OF AUTOMATICALLY GENERATING FINGERPRINT DATABASE FOR AN INDOOR WIRELESS LOCATION - The present invention relates to a method of automatically generating a fingerprint database for indoor wireless location. For this purpose, the present invention provides a method of generating a fingerprint database that determines a method of calculating the strength of signals transmitted from a plurality of access points, calculates the strength of signals at nodes of a plurality of vertical and horizontal grids set in an indoor space, and generates a database table by using the location information about the nodes and the calculated strength of the signals. Further, the present invention provides an environment analysis tool including a communication module that performs communication between at least one of the access points and a receiving terminal, an environment analysis module that calculates the strength of a signal at a specific location by using a method of calculating strength and generates a fingerprint database table, and a fingerprint database that stores the fingerprint database table. According to the present invention, it is possible to reduce time and manpower required to build a fingerprint database, and to easily build a new fingerprint database even though an indoor structure is changed. | 10-21-2010 |
20110102180 | APPARATUS AND METHOD FOR ESTIMATING TAG LOCATION - A first tag that is located in a communication coverage area among a plurality of tags is selected as a base tag in order to estimate tag location in an apparatus for estimating tag location that communicates with a plurality of tags. A second tag whose location is estimated among the plurality of tags is searched. First distance information of the second tag is estimated by performing a ranging procedure of the second tag. The second distance information estimated between the first tag and the second tag is received from the first tag, and the location information of the second tag is estimated by using the first distance information and the second distance information. | 05-05-2011 |
20120071170 | METHOD AND SERVER FOR ESTIMATING POSITION OF MOBILE NODE - A position estimation server estimates the position of a target mobile node by using position information of a minimum number of anchor nodes knowing their position, distance information estimated between mobile nodes or between the anchor nodes and the mobile nodes, and connectivity information. | 03-22-2012 |
20130324150 | LOCATION ESTIMATION APPARATUS AND METHOD - Disclosed herein is a location estimation apparatus and method. The location estimation apparatus according to the present invention includes a setting unit for setting a coordinate system based on location information. A selection unit selects a target node, a location of which is to be estimated, based on connection information between nodes received from a plurality of nodes constituting a network. An estimation unit estimates location information of the target node depending on a connection relationship between the target node and reference nodes, location information of which is known. | 12-05-2013 |
20140149034 | APPARATUS FOR INTEGRATING MULTIPLE RATE SYSTEMS AND METHOD OF OPERATING THE SAME - Disclosed herein are an apparatus for integrating multiple rate systems and a method of operating an apparatus for integrating multiple rate systems. In the method of operating the apparatus, navigation information is calculated through an inertial measurement unit, and mean values and variances of initial state variables of the navigation information are set. Sigma points are calculated using the mean values and the variances. The mean values are time-propagated until measurement information is input through a Global Positioning System (GPS). When the measurement information is input, the sigma points are time-propagated at intervals of a frequency of the measurement information. Variances are calculated using the time-propagated sigma points. The navigation information is updated using the time-propagated mean values, the calculated variances, and the measurement information. | 05-29-2014 |
20140211319 | HEAD-UP DISPLAY APPARATUS AND METHOD FOR VEHICLE - Disclosed herein is a head-up display apparatus for a vehicle. The head-up display includes an information analysis unit, a first information determination unit, a second information determination unit, and an information display unit. The information analysis unit collects vehicle state information, driver state information, driving environment state information, driver gaze information, individual characteristic information and common characteristic information from a plurality of information collection units, and analyzes the collected information. The first information determination unit prioritizes the vehicle state information, the driver state information, and the driving environment state information. The second information determination unit determines a driver's field of view based on driver field of view information and driver individual and common characteristic information. The information display unit changes information to be displayed to the driver based on priorities and the driver's field of view, and then displays the changed information. | 07-31-2014 |