Method and apparatus for removing noise in a loran-c...

Details Method and apparatus for removing noise in a loran-c... Method and apparatus for removing noise in a loran-c...

G - Physics

01

S

343/87

G01S 1/24 (2006.01)

Patent

CA 1141845

D-? ?B JEF:eo A METHOD AND APPARATUS FOR REMOVING NOISE IN A LORAN-C NAVIGATION RECEIVER Abstract Noise generated in the front end of a LORAN-C receiver that causes noise bias interfering with carrier cycle detection is effectively removed by periodically shifting the phase of all received signals by 180° in the front end of the receiver and then removing any phase shift elsewhere in the receiver where noise is no longer a problem but before the phase shift can affect time difference of signal arrival measurements normally made in LORAN-C receivers. In this manner, noise generated in the front end of the receiver is averaged out and doesn't introduce bias levels to the received signal.

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