Signal acquisition using data bit information
DCFirst Claim
1. A method for searching a received signal for a modulated signal comprising:
- sampling said received signal to obtain sampled data of said received signal;
obtaining data bit information that indicates which portions of said modulated signal have a sign change;
processing said sampled data of said received signal, to yield processed data;
dividing said processed data into a plurality of data blocks; and
for one or more of said data blocks, computing I and Q correlation integrals between said sampled data and said modulated signal based on said data bit information.
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Abstract
Techniques are provided for aiding in acquiring a signal using the data bit information that is associated with each signal source. One aspect of the invention is to use the data bit information that is associated with each signal source when calculating the In Phase and Quadrature correlation integrals by using the sampled data associated with the received signal. By using the data bit information that is associated with each signal source, coherent correlation may be performed by breaking the signal into data blocks and performing calculations on a block-by-block basis. Coherent correlation is the calculation of In Phase and Quadrature correlation integrals for sampled data that is associated with the received signal.
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Citations
25 Claims
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1. A method for searching a received signal for a modulated signal comprising:
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sampling said received signal to obtain sampled data of said received signal;
obtaining data bit information that indicates which portions of said modulated signal have a sign change;
processing said sampled data of said received signal, to yield processed data;
dividing said processed data into a plurality of data blocks; and
for one or more of said data blocks, computing I and Q correlation integrals between said sampled data and said modulated signal based on said data bit information. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23)
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24. A medium storing instructions to be executed by a processor for searching a received signal for a modulated signal comprising:
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instructions for sampling said received signal, to obtain sampled data of said received signal;
instructions for obtaining data bit information that indicates which portions of said modulated signal have a sign change;
instructions for processing said sampled data of said received signal, to yield processed data;
instructions for dividing said processed data into a plurality of data blocks; and
instructions for computing I and Q correlation integrals between said sampled data and said modulated signal based on said data bit information, for one or more of said data blocks.
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25. A device for searching a received signal for a modulated signal comprising:
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means for sampling said received signal, to obtain sampled data of said received signal;
means for obtaining data bit information that indicates which portions of said modulated signal have a sign change;
means for processing said sampled data of said received signal, to generate processed data;
means for dividing said processed data into a plurality of data blocks; and
means for computing I and Q correlation integrals between said sampled data and said modulated signal based on said data bit information, for one or more of said data blocks.
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Specification