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US 12,112,764 B2Granted
Delay estimation using frequency spectral descriptors
AssigneeNuvoton Technology Corporation
InventorsPowen Ru, Dung Nguyen, Andrew Zamansky
Life of this patent
Estimating the term…
Abstract
A method is disclosed to estimate the delay between an original signal and the corresponding captured signal. The signals are transformed and buffered to two sets of spectral descriptors for a similarity measure. The method advantageously offers robust delay estimation for inconsistent delays and adverse spectral distortions.
Claims20
A system comprising:
- a host device to provide a known waveform;
- a signal transmitter to obtain the known waveform from the host device via a channel and to emit a signal corresponding to the known waveform;
- and
- a signal receiver to convert the signal to a received waveform and emit the received waveform to the host device;
- wherein the host device comprises a processor being configured to:
- transform the known waveform to a reference spectral descriptor matrix and a reference magnitude representation matrix;
- transform the received waveform via the signal receiver to a received spectral descriptor matrix;
- obtain a similarity measure between the reference spectral descriptor matrix and the received spectral descriptor matrix;
- accumulate the similarity measure based on at least one statistic of the reference magnitude representation matrix to obtain a cumulative similarity measure;
- determine a delay based on the cumulated similarity measure;
- and
- output information characterizing the delay.
9 more elements
A computer-implemented method comprising:
- transforming a known waveform to a reference spectral descriptor matrix and storing the reference spectral descriptor matrix in a first buffer;
- transforming a received waveform to a received spectral descriptor matrix and storing the received spectral descriptor matrix in a second buffer;
- transforming the known waveform to a reference magnitude representation matrix and storing the reference magnitude representation matrix in a third buffer;
- obtaining a similarity measure between the reference spectral descriptor matrix and the received spectral descriptor matrix;
- accumulating the similarity measure based on at least one statistic of the reference magnitude representation matrix to obtain a cumulative similarity measure;
- determining a delay based on the cumulated similarity measure;
- and
- outputting information characterizing the delay.
5 more elements
Dependencies are inferred from the claim text.