Method and apparatus for profiling and identifying the source of a signal

摘要

A method and apparatus for profiling and identifying the source of a signal is provided. A first method includes receiving a signal produced by a known source and creating a matrix of wavelet coefficients corresponding to a wavelet transform of the signal. The method also includes profiling the signal according to an output of a wavelet transform utilizing a particular base function and a particular scale set. A second method includes performing a wavelet transform having a particular profile on a received signal and determining the presence of a particular signal-producing entity as a function of wavelet coefficients exceeding a threshold. An apparatus includes a receiver configured to receive a signal and a processor coupled to the receiver, such that the processor is configured to perform wavelet transforms on the signals. A database is coupled to the processor and configured to store wavelet transform profiles.

主权项

1. A method for profiling a signal-producing entity, comprising:
receiving a signal produced by a known source; creating a matrix comprising a plurality of wavelet coefficients, wherein each of the wavelet coefficients correspond to an output produced by a continuous wavelet transform of the signal for each of a plurality of base functions and for each of a plurality of scales; selecting a particular base function from the plurality of base functions, wherein the particular base function corresponds to a maximum wavelet coefficient; generating a graph plotting a parameterization of each wavelet coefficient output by a wavelet transform of the signal for the particular base function and a corresponding scale; selecting a particular set of scales from the plurality of scales, wherein the particular set of scales correspond to a set of peaks in the graph; and profiling the signal as a set of wavelet coefficients corresponding to an output of a wavelet transform utilizing the particular base function and the particular set of scales.