Method and system for localizing mobile communications terminals

摘要

A method of determining a geographic position of a user terminal including a receiver of signals of a global navigation satellite system, the method including the user terminal: performing pseudo-range measurements related to a plurality of signals received from transmitters of the global navigation satellite system; calculating a first estimated position thereof by a weighted least square method; calculating post-fit residuals for the first estimated position; comparing the calculated post-fit residuals to a first threshold and: in case the first threshold is exceeded, calculating a second estimated position using a Monte-Carlo method, otherwise retaining the first estimated position as the geographic position of the mobile communications terminal.

主权项

1. A method of determining a geographic position of a user terminal comprising a receiver of signals of a global navigation satellite system, the method comprising:
performing, at the user terminal, pseudo-range measurements related to a plurality of signals received from transmitters of the global navigation satellite system; calculating, at the user terminal, a first estimated position thereof by means of a weighted least square method; calculating, at the user terminal, post-fix residuals for the first estimated position; comparing, at the user terminal, the calculated post-fix residuals to a first threshold; in case the first threshold is exceeded, calculating, at the user terminal, a second estimated position using a Monte-Carlo method; and in case the first threshold is not exceeded, retaining, at the user terminal, the first estimated position as the geographic position of the mobile communications terminal.