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AssigneeSensormatic Electronics Corporation
InventorsNurgun Erdol, Feng Bao
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Wavelet transform processing is performed on an input signal received at a receiver circuit of an electronic article surveillance (EAS) system. The input signal includes a target signal generated by an EAS marker and also includes correlated high amplitude interference signals. The wavelet transform processing is performed so as to generate from the input signal plural wavelet transform signals having mutually different phases. The wavelet transform is substantially phase invariant with respect to the interference signals and lacks phase invariance with respect to the target signal. Uncorrelated components of the plural phase-diverse wavelet transform signals are identified to detect the target signal.
A method of generating wavelet transform signals having mutually different phases, comprising the steps of:
Apparatus for generating wavelet transform signals having mutually different phases, comprising:
A method of generating wavelet transform signals having mutually different phases, comprising the steps of:
A method of performing signal analysis on an input signal which includes a transient target signal that is predictable as to shape but not as to amplitude or time of occurrence and interfering signals correlated with the target signal, comprising the steps of:
Apparatus for performing signal analysis on an input signal which includes a transient target signal that is predictable as to shape but not as to amplitude or time of occurrence and interfering signals correlated with the target signal, comprising:
An electronic article surveillance system comprising:
An electronic article surveillance system comprising:
A method of performing electronic article surveillance, comprising the steps of:
Dependencies are inferred from the claim text.