Method and apparatus for processing satellite positioning system signals to obtain time information
First Claim
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1. A method of processing satellite positioning system data at a mobile receiver, comprising:
- sampling at least one satellite positioning system signal to generate a sequence of digital samples;
correlating said sequence of digital samples with a pseudorandom reference code to generate a sequence of correlation results;
integrating said correlation results over a selected time period according to the bit pattern;
determining a bit-transition in response to said integrated sequence of correlation results; and
generating a bit pattern including a known preamble and an extended preamble, said extended preamble comprising expected data bits within said satellite navigation data.
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Abstract
A method and apparatus for processing satellite positioning system signals at a mobile receiver is described. In one example, first bit-transitions within satellite navigation data transmitted by at least one satellite are estimated at the mobile receiver. A bit pattern is generated that includes a known preamble and an extended preamble. The extended preamble includes expected data bits within the satellite navigation data. The first bit-transitions are compared with second bit-transitions of the bit pattern to generate match data.
5 Citations
38 Claims
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1. A method of processing satellite positioning system data at a mobile receiver, comprising:
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sampling at least one satellite positioning system signal to generate a sequence of digital samples; correlating said sequence of digital samples with a pseudorandom reference code to generate a sequence of correlation results; integrating said correlation results over a selected time period according to the bit pattern; determining a bit-transition in response to said integrated sequence of correlation results; and generating a bit pattern including a known preamble and an extended preamble, said extended preamble comprising expected data bits within said satellite navigation data. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
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20. A mobile receiver, comprising:
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a satellite signal receiver for detecting satellite navigation data transmitted by at least one satellite; and a controller for generating a bit pattern including a known preamble and an extended preamble, said extended preamble comprising expected data bits within said satellite navigation data, sampling at least one satellite positioning system signal to generate a sequence of digital samples, correlating said sequence of digital samples with a pseudorandom reference code to generate a sequence of correlation results, integrating said correlation results over a selected time period according to the bit pattern, and determining a bit-transition in response to said integrated sequence of correlation results. - View Dependent Claims (21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38)
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Specification