Method and apparatus for detecting an eas marker using...

Details Method and apparatus for detecting an eas marker using... Method and apparatus for detecting an eas marker using...

G - Physics

08

B

G08B 13/24 (2006.01) G06F 17/00 (2006.01) G06F 17/14 (2006.01)

Patent

CA 2155157

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.

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