Methods, devices and systems for receiving and decoding a signal in the presence of noise using slices and warping
First Claim
1. A method, comprising:
- receiving a signal, the signal encoding a data packet;
sampling the signal to generate sampled values;
generating a slice record comprising a plurality of slices from the sampled values by correlating the sampled values with first and second reference templates, the first reference template comprising a first reference function and the second reference template comprising a second reference function in quadrature with the first reference function;
cross-correlating the slice record with a stored template to generate cross-correlation terms; and
determining when a magnitude of the cross-correlation terms exceeds a predetermined threshold for a width of the stored template.
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Abstract
A method may include receiving a signal. The signal may encode a data packet. The method may include further sampling the signal to generate sampled values, and generating a slice record comprising a plurality of slices from the sampled values by correlating the sampled values with first and second reference templates. The first reference template may include a first reference function, and the second reference template may include a second reference function in quadrature with the first reference function. The method may further include cross-correlating the slice record with a stored template to generate cross-correlation terms, and determining when a magnitude of the cross-correlation terms exceeds a predetermined threshold for a width of the stored template.
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Citations
15 Claims
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1. A method, comprising:
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receiving a signal, the signal encoding a data packet; sampling the signal to generate sampled values; generating a slice record comprising a plurality of slices from the sampled values by correlating the sampled values with first and second reference templates, the first reference template comprising a first reference function and the second reference template comprising a second reference function in quadrature with the first reference function; cross-correlating the slice record with a stored template to generate cross-correlation terms; and determining when a magnitude of the cross-correlation terms exceeds a predetermined threshold for a width of the stored template. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A method, comprising:
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receiving a signal; sampling the signal to generate sampled values; correlating the sampled values with predetermined first and second templates of values obtained at a first frequency to generate a plurality of slices at the first frequency; transforming at least some of the generated plurality of slices at the first frequency to slices at a second frequency that is different from the first frequency; generating a first filter from the slices at the second frequency; transforming at least some of the generated plurality of slices at the first frequency to slices at a third frequency that is different from the first and second frequencies, and generating a second filter from the slices at the third frequency. - View Dependent Claims (11, 12, 13)
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14. A method, comprising:
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receiving a signal, the signal encoding a data packet at a first frequency; quantizing the received signal to generate sampled values that are above or below a predetermined noise threshold; correlating the sampled values with first and second templates of values obtained at a second frequency that is different from the first frequency to generate a plurality of slices at the second frequency, each of the slices comprising a pair of values; transforming at least some of the plurality of slices at the second frequency to slices at the second frequency plus or minus an offset, and generating a filter having a center frequency at the second frequency plus or minus the offset by combining the transformed slices. - View Dependent Claims (15)
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Specification