Electronic article surveillance system with adaptive filtering a

Details Electronic article surveillance system with adaptive filtering a Electronic article surveillance system with adaptive filtering a

1996-05-07

1997-02-11

Swann, Glen

Communications: electrical

Condition responsive indicating system

Specific condition

340551, 340552, G08B 13181

Patent

active

056025319

ABSTRACT:
An electronic article surveillance (EAS) systems includes an asynchronous noise suppression adaptive filter which removes asynchronous interference from the signal of interest with minimum distortion of the transients emitted when a sensitized tag is interrogated. The system also includes a synchronous noise suppression filter which removes interrogation synchronous noise from the signal of interest. The resulting EAS system increases the likelihood that a sensitized tag will be detected when one is present and reduces the occurrence of false alarms.

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