METHOD OF CLOCK OFFSET COMPENSATION FOR WIRELESS POSITIONING AND APPARATUS THEREOF

摘要

PURPOSE: A clock offset compensation method and an apparatus thereof are provided to minimize an error problem of a location estimation result due to clock offset by compensating a clock frequency of each beacon. CONSTITUTION: A compensation pulse information reception unit(410) receives compensation pulse information from beacons which receive a first compensation pulse and a second compensation pulse from a compensation node. The compensation pulse information includes a clock count number of the first compensation pulse and the second compensation pulse. A location pulse information reception unit(420) receives location pulse information from a plurality of beacons receiving a location pulse from a tag corresponding to a positioning target. A clock offset compensation unit(430) calculates a relative clock frequency ratio by beacon for clock offset compensation between beacons using the compensation pulse information. A clock count compensation unit(440) calculates compensated clock count information between a beacon and a tag by each beacon using the each clock count number and the each relative clock frequency ratio about the first compensation pulse, the second compensation pulse and the location pulse. [Reference numerals] (410) Compensation pulse information reception unit; (420) Location pulse information reception unit; (430) Clock offset compensation unit; (440) Clock count compensation unit