888 Mobile station e.g. cellular telephone, direction, speed and position determining method for terrestrial positioning system, involves calculating projection of acceleration of station on plane perpendicular to gravitation

摘要

#CMT# #/CMT# The method involves determining a reference direction using a routing initialization algorithm, and calculating the attitude of a mobile station e.g. cellular telephone. The projection of the acceleration of the mobile station on a plane perpendicular to the gravitation following the reference direction is calculated. The calculation of the mobile station attitude is effectuated by determining rotation matrix of inertial reference frame of the mobile station. #CMT#USE : #/CMT# Used in the field of terrestrial positioning system for determining the position, speed and direction of a 888 mobile station e.g. personal digital assistant, cellular telephone and pocket computer. #CMT#ADVANTAGE : #/CMT# The method permits to complete in real time the information provided by the primary positioning system, thus permitting to form the hybrid navigation system for the mobile station. The method permits to determine the position, speed and direction of the mobile station in precise manner. #CMT#DESCRIPTION OF DRAWINGS : #/CMT# The drawing shows the modeling of a map of an urban area by a network of nodes composed of branches.