Patent ID: 7978130
Filing Date: 2011-07-12
Classification: G01S

Abstract:
1. A method of upgrading existing Global Navigation Satellite System (GNSS) user equipment, comprising the steps of: providing first GNSS user hardware including a first oscillator driving a precise coded reference signal generator arranged to generate a reference signal and supply the reference signal to an existing second GNSS user device, and a Navigation/Communication processor arranged to generate position, navigation, and/or timing signals upon receipt from the second GNSS user device of coherent correlations of incoming GNSS signals and the reference signal; providing an existing second GNSS user device separate from the first GNSS user hardware, said second GNSS user device including at least one existing port and a second oscillator arranged to produce said coherent correlations of incoming GNSS signals and the reference signal generated by the add-on first GNSS hardware, and to send the coherent correlations to the first GNSS user hardware, coupling the first GNSS user hardware to the second GNSS user device via the existing port without modifying hardware of the second GNSS user device.