Decoding method and receiving device
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United States of America Patent
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Nov 11, 2014
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app pub date -
Sep 10, 2013
filing date -
Sep 11, 2012
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Abstract
A first correlation calculation is performed based on a first predicted frequency, with respect to received data of a GPS satellite signal. An error frequency of the first predicted frequency is estimated using a carrier phase of the GPS satellite signal based on the result of the first correlation calculation. The first predicted frequency is corrected using the error frequency, and a second predicted frequency is thus calculated. Then, a second correlation calculation is performed with respect to the same received data, based on the second predicted frequency. A navigation message carried on the GPS satellite signal is decoded using the result of the second correlation calculation.
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