Leading edge detection
First Claim
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1. A method of leading edge detection, comprising:
- receiving a signal, wherein the signal comprises a multipath spread pulse including a plurality of lobes;
sampling the received signal to generate samples;
generating a drift compensated signal based on the samples;
reconstructing the received signal based on the drift compensated signal; and
identifying a leading edge associated with the received signal based on the reconstructed signal, wherein identifying the leading edge comprises identifying an earliest received one of the plurality of lobes.
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Abstract
A leading edge associated with a received signal is detected to provide, for example, time of arrival information for a ranging algorithm. In some aspects, a method of leading edge detection involves sampling a received signal, generating a drift compensated signal based on the samples, reconstructing the received signal based on the drift compensated signal, and identifying a leading edge associated with the received signal based on the reconstructed signal.
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Citations
55 Claims
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1. A method of leading edge detection, comprising:
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receiving a signal, wherein the signal comprises a multipath spread pulse including a plurality of lobes; sampling the received signal to generate samples; generating a drift compensated signal based on the samples; reconstructing the received signal based on the drift compensated signal; and identifying a leading edge associated with the received signal based on the reconstructed signal, wherein identifying the leading edge comprises identifying an earliest received one of the plurality of lobes. - View Dependent Claims (2, 3, 4, 5, 8, 9, 10)
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6. A method of leading edge detection, comprising:
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receiving a signal, wherein the received signal comprises a plurality of pulses; sampling the received signal to generate samples, wherein the samples comprise a plurality of sample sets associated with the pulses; generating a drift compensated signal based on the samples, wherein the generation of the drift compensated signal comprises time shifting at least one of the sample sets; reconstructing the received signal based on the drift compensated signal, wherein the reconstructing of the received signal comprises summing the sample sets after the time shifting; and identifying a leading edge associated with the received signal based on the reconstructed signal. - View Dependent Claims (7)
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11. A method of leading edge detection, comprising:
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receiving a signal, wherein the received signal comprises a set of pulses; sampling the received signal to generate samples; generating a drift compensated signal based on the samples; reconstructing the received signal based on the drift compensated signal; identifying a leading edge associated with the received signal based on the reconstructed signal; generating a drift compensated clock signal, wherein the generation of the samples is based on the drift compensated clock signal; estimating a residual drift associated with the set of pulses; determining timing of the leading edge; and adjusting the timing based on the residual drift. - View Dependent Claims (12, 13, 14, 15, 16, 17)
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18. An apparatus for leading edge detection, comprising:
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a receiver configured to receive a signal, and further configured to sample the received signal to generate samples, wherein the signal comprises a multipath spread pulse including a plurality of lobes; a drift compensator configured to generate a drift compensated signal based on the samples; a signal reconstructor configured to reconstruct the received signal based on the drift compensated signal; and a leading edge identifier configured to identify a leading edge associated with the received signal based on the reconstructed signal, wherein the leading edge identifier is configured to identify the leading edge by identifying an earliest received one of the plurality of lobes. - View Dependent Claims (19, 20, 21, 22, 25, 26, 27)
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23. An apparatus for leading edge detection, comprising:
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a receiver configured to receive a signal, and further configured to sample the received signal to generate samples, wherein the received signal comprises a plurality of pulses, and wherein the samples comprise a plurality of sample sets associated with the pulses; a drift compensator configured to generate a drift compensated signal based on the samples, wherein the generation of the drift compensated signal comprises time shifting at least one of the sample sets; and a signal reconstructor configured to reconstruct the received signal based on the drift compensated signal, wherein the reconstructing of the received signal comprises summing the sample sets after the time shifting; and a leading edge identifier configured to identify a leading edge associated with the received signal based on the reconstructed signal. - View Dependent Claims (24)
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28. An apparatus for leading edge detection, comprising:
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a receiver configured to receive a signal, and further configured to sample the received signal to generate samples, wherein the received signal comprises a set of pulses; a drift compensator configured to generate a drift compensated signal based on the samples; a signal reconstructor configured to reconstruct the received signal based on the drift compensated signal; a leading edge identifier configured to identify a leading edge associated with the received signal based on the reconstructed signal; a clock generator configured to generate a drift compensated clock signal, wherein the generation of the samples is based on the drift compensated clock signal; a residual drift estimator configured to estimate a residual drift associated with the set of pulses; wherein the leading edge identifier is further configured to determine timing of the leading edge; and wherein the leading edge identifier is further configured to adjust the timing based on the residual drift. - View Dependent Claims (29, 30, 31, 32, 33, 34)
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35. An apparatus for leading edge detection, comprising:
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means for receiving a signal, wherein the signal comprises a multipath spread pulse including a plurality of lobes; means for sampling the received signal to generate samples; means for generating a drift compensated signal based on the samples; means for reconstructing the received signal based on the drift compensated signal; and means for identifying a leading edge associated with the received signal based on the reconstructed signal, wherein the leading edge identifying means comprises means for identifying an earliest received one of the plurality of lobes. - View Dependent Claims (36, 37, 38, 39, 42, 43, 44)
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40. An apparatus for leading edge detection, comprising:
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means for receiving a signal, wherein the received signal comprises a plurality of pulses; means for sampling the received signal to generate samples, wherein the samples comprise a plurality of sample sets associated with the pulses; means for generating a drift compensated signal based on the samples, wherein the generation of the drift compensated signal comprises time shifting at least one of the sample sets; means for reconstructing the received signal based on the drift compensated signal, wherein the reconstructing of the received signal comprises summing the sample sets after the time shifting; and means for identifying a leading edge associated with the received signal based on the reconstructed signal. - View Dependent Claims (41)
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45. An apparatus for leading edge detection, comprising:
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means for receiving a signal, wherein the received signal comprises a set of pulses; means for sampling the received signal to generate samples; means for generating a drift compensated signal based on the samples; means for reconstructing the received signal based on the drift compensated signal; means for identifying a leading edge associated with the received signal based on the reconstructed signal; means for generating a drift compensated clock signal, wherein the generation of the samples is based on the drift compensated clock signal; means for estimating a residual drift associated with the set of pulses; means for determining timing of the leading edge; and means for adjusting the timing based on the residual drift. - View Dependent Claims (46, 47, 48, 49, 50, 51)
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52. A computer-program product for leading edge detection, comprising:
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a non-transitory computer-readable medium embedded with the computer-program product that includes codes executable by an apparatus for; receiving a signal, wherein the received signal comprises a plurality of pulses; sampling the received signal to generate samples, wherein the samples comprise a plurality of sample sets associated with the pulses; generating a drift compensated signal based on the samples, wherein the generation of the drift compensated signal comprises time shifting at least one of the sample sets; reconstructing the received signal based on the drift compensated signal, wherein the reconstructing of the received signal comprises summing the sample sets after the time shifting; and identifying a leading edge associated with the received signal based on the reconstructed signal.
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53. A headset, comprising:
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a receiver configured to receive a signal, and further configured to sample the received signal to generate samples, wherein the received signal comprises a plurality of pulses, and wherein the samples comprise a plurality of sample sets associated with the pulses; a drift compensator configured to generate a drift compensated signal based on the samples, wherein the generation of the drift compensated signal comprises time shifting at least one of the sample sets; a signal reconstructor configured to reconstruct the received signal based on the drift compensated signal, wherein the reconstructing of the received signal comprises summing the sample sets after the time shifting; a leading edge identifier configured to identify a leading edge associated with the received signal based on the reconstructed signal; and a transducer configured to provide an audio output as a result of the identification of the leading edge.
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54. A watch, comprising:
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a receiver configured to receive a signal, and further configured to sample the received signal to generate samples, wherein the received signal comprises a plurality of pulses, and wherein the samples comprise a plurality of sample sets associated with the pulses; a drift compensator configured to generate a drift compensated signal based on the samples, wherein the generation of the drift compensated signal comprises time shifting at least one of the sample sets; a signal reconstructor configured to reconstruct the received signal based on the drift compensated signal, wherein the reconstructing of the received signal comprises summing the sample sets after the time shifting; a leading edge identifier configured to identify a leading edge associated with the received signal based on the reconstructed signal; and a user interface configured to provide an indication as a result of the identification of the leading edge.
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55. A sensing device, comprising:
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a receiver configured to receive a signal, and further configured to sample the received signal to generate samples, wherein the received signal comprises a plurality of pulses, and wherein the samples comprise a plurality of sample sets associated with the pulses; a drift compensator configured to generate a drift compensated signal based on the samples, wherein the generation of the drift compensated signal comprises time shifting at least one of the sample sets; a signal reconstructor configured to reconstruct the received signal based on the drift compensated signal, wherein the reconstructing of the received signal comprises summing the sample sets after the time shifting; a leading edge identifier configured to identify a leading edge associated with the received signal based on the reconstructed signal; and a sensor configured to provide data for transmission as a result of the identification of the leading edge.
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Specification