Patent application number | Description | Published |
20080207226 | POSITIONING SYSTEM, POSITIONING METHOD, AND POSITIONING PROGRAM - An object of the present invention is to implement accurate positioning of a mobile communication terminal even in an environment in which delay waves are included in radio waves arriving at the mobile communication terminal from radio wave sources. A positioning server | 08-28-2008 |
20080252528 | POSITIONING SYSTEM, POSITIONING IC CHIP, POSITIONING METHOD AND POSITIONING PROGRAM - The present invention easily evaluates the positioning accuracy by using fewer signal sources. The receiver is a positioning system for estimating the position of the receiver itself which is constituted by: a distance calculation section which calculates information indicating the respective distances between a plurality of GPS satellites and the receiver on the basis of signals which are transmitted by the plurality of GPS satellites and received by the receiver; a position calculation section which calculates the position of the receiver from information indicating the positions of the respective GPS satellites and information indicating the respective distances thus calculated; a distance difference calculation section which calculates, for each of the GPS satellites, the differences between the respective distances from the calculated position of the receiver to the respective GPS satellites, and the respective distances calculated by the distance calculation section; and a position accuracy evaluation section which evaluates an accuracy of the calculated position of the receiver on the basis of variation, between the GPS satellites, of the calculated differences, for each of the GPS satellites. | 10-16-2008 |
20090015471 | POSITIONING SYSTEM, IC CHIP FOR POSITIONING, POSITIONING METHOD, AND POSITIONING PROGRAM - A positioning system accurately estimates transmission times of signals from a signal transmitter and measures a position of a receiver on the basis of the transmission times. The receiver | 01-15-2009 |
20100007552 | POSITIONING SYSTEM, POSITIONING METHOD, AND POSITIONING PROGRAM - An object of the present invention is to obtain a positioning result according to a condition of a receiver in a shorter period of time. A positioning server | 01-14-2010 |
20100317366 | INDOOR/OUTDOOR DECISION APPARATUS AND INDOOR/OUTDOOR DECISION METHOD - An appropriate indoor/outdoor decision is made for a mobile communication terminal in accordance with a purpose of selection of a positioning method or the like. A positioning server | 12-16-2010 |
20100323628 | BUILDING INFLUENCE ESTIMATION APPARATUS AND BUILDING INFLUENCE ESTIMATION METHOD - Appropriate and easy estimation is achieved for influence of a building on a mobile communication terminal. A building influence estimation apparatus | 12-23-2010 |
20110210904 | APPARATUS HAVING MUSHROOM STRUCTURES - An apparatus having multiple mushroom structures is disclosed. Each of the multiple mushroom structures including: a ground plate; a first patch provided parallel to the ground plate with a separation of a distance to the ground plate; and a second patch provided parallel to the ground plate with a separation of another distance to the ground plate, which another distance being different from the distance from the first patch to the ground plate, wherein the second patch is a passive element which is capacitatively coupled with at least the first patch. | 09-01-2011 |
20110210905 | APPARATUS HAVING MUSHROOM STRUCTURES - An apparatus having multiple mushroom structures is disclosed. Each of the multiple mushroom structures includes: a ground plate; a patch provided parallel to the ground plate with a separation of a distance to the ground plate, wherein a distance between a ground plate and a patch in a certain mushroom structure is different from a distance between a ground plate and a patch in a different mushroom structure. | 09-01-2011 |
20110210906 | APPARATUS HAVING MUSHROOM STRUCTURES - An apparatus having multiple mushroom structures is disclosed. Each of the multiple mushroom structures includes: a ground plate; a first patch provided parallel to the ground plate with a separation of a distance to the ground plate; and a second patch provided parallel to the ground plate with a separation of another distance to the ground plate, which another distance being different from the distance from the first patch to the ground plate, wherein the second patch is a passive element which is capacitatively coupled with at least the first patch. | 09-01-2011 |
20120057619 | RELAY APPARATUS AND RELAY METHOD - A relay apparatus is disclosed for relaying a signal from a transmitter to a receiver in a MIMO (Multiple Input Multiple Output) based communication system, comprising: a power difference determination unit configured to determine a difference of reception levels between a direct wave and a relayed wave based on positional relationship among the transmitter, the relay apparatus and the receiver, the direct wave traveling from the transmitter to the receiver without the relay apparatus, the relayed wave traveling from the transmitter to the receiver via the relay apparatus; a gain determination unit configured to determine an amplification gain of the relay apparatus to make the difference smaller; and a transmitting unit configured to amplify the signal from the transmitter at the determined amplification gain and transmit the amplified signal to the receiver. | 03-08-2012 |
20120302177 | PROPAGATION PATH ESTIMATION METHOD AND PROGRAM AND APPARATUS USING THE SAME - A propagation path estimation method using an imaging method according to the invention includes a step of, in a case where a reflectarray which causes reflection and scattering in a different direction (θ−η)° from a specular reflection direction θ° exists on a propagation path from a transmission point to a reception point RX of the radio wave, calculating a virtual reception point VRX by rotating the reception point RX about a rotation center point O, and estimating the propagation path by using the virtual reception point VRX. | 11-29-2012 |
20120303328 | PROPAGATION PATH ESTIMATION METHOD AND PROGRAM AND APPARATUS USING THE SAME - A propagation path estimation method using an imaging method according to the invention includes a step of, in a case where a reflect array | 11-29-2012 |