Multi-channel digital receiver for global positioning system

Details Multi-channel digital receiver for global positioning system Multi-channel digital receiver for global positioning system

G - Physics

01

S

G01S 5/14 (2006.01) G01S 1/00 (2006.01) G01S 1/04 (2006.01) H04B 1/707 (2006.01)

Patent

CA 2055105

A receiver for pseudorandom noise (PRN) encoded signals consisting of a sampling circuit and multiple channel circuits, with each channel circuit including a carrier and code synchronizing circuit and multiple digital correlators with dynamically adjustable code delay spacing. The sampling circuit provides high-rate digital samples of the incoming composite signal to each receiver channel. Within each channel, the synchronizing circuit detects cycle slips in a locally generated carrier reference signal as well as phase drift in a locally generated PRN code signal. The correlators compare the digital samples with a locally generated PRN code to produce early, late, and/or punctual correlation signals which are used to adjust the local PRN code. A non-linear sampling technique may be used to provide increased sensitivity in the presence of continuous wave interfering signals.

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