Patent ID: 7154437
Filing Date: 2006-12-26
Classification: G01S

Abstract:
1. A method for determining a geolocation of an object, comprising: collecting a plurality of positioning signals each including a predetermined message data segment; identifying the predetermined message data segment in each of the plurality of positioning signals, the predetermined message data segment being identical in each positioning signal and transmitted within each positioning signal at an identical moment in time; determining a time of arrival of the predetermined message data segment upon identification in each of the collected positioning signals; determining a time difference between at least two of the collected positioning signals based on the respective times of arrival of the respective predetermined message data segments; providing information based on the time difference for determination of a geolocation of the object; wherein the positioning signals include global positioning system (GPS) positioning signals, the method further comprising compensating for carrier frequency offset (CFO) of the satellites prior to determining the time of arrival.