Communications: electrical – Condition responsive indicating system – Specific condition
Patent
1996-04-22
1997-09-30
Swann, Glen
Communications: electrical
Condition responsive indicating system
Specific condition
340551, G08B 1324
Patent
active
056730241
ABSTRACT:
A signal received in an electronic article surveillance system is subjected to a nonlinear comb filtering function to remove interference. The nonlinear comb filtering is provided by performing a polyphase decomposition of an input digital signal, nonlinear filtering of the resulting subsequences, and then synthesizing the nonlinear-filtered subsequences. A median filter may be used as the subsequence filtering function. A linear comb filtering function may be provided downstream from the nonlinear comb filter to provide additional attenuation of interference.
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Bettine Dale R.
Frederick Thomas J.
Sensormatic Electronics Corporation
Swann Glen
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