Patent ID: 8228229
Filing Date: 2012-07-24
Classification: G01S

Abstract:
1. A space navigation receiver (NR), comprising i) a radiofrequency processing module (PM 1 ) configured to convert radio navigation signals transmitted by a satellite navigation system into digital signals, ii) a digital processing module (PM 2 ) configured to produce raw measurements based on said navigation digital signals, and iii) a location module (LM) configured to determine location points from said raw measurements, demodulated navigation data initially contained within said digital navigation signals in a modulated form, and orbital force models, wherein said radiofrequency processing module (PM 1 ) is also configured to convert auxiliary radio signals representative of navigation information about said system into auxiliary digital signals, and said digital processing module (PM 2 ) is configured to periodically acquire said digital navigation signals by sub-sampling the received radio signal, then processing the acquired signal's samples resulting from said sub-sampling so as to deduce said raw measurements from these samples, from said auxiliary digital signals, and from said location points.