发明名称 |
Automatic wireless synchronization of electronic article surveillance systems |
摘要 |
A distributed wireless phase locked loop system for synchronizing the transmit carrier's modulating waveform, such as the transmitter pulse timing in a pulsed EAS system and the transmit sweeping function for swept RF synchronization, is provided. To remove the effect of phase noise on the power line signal, a phase locked loop is used to filter this signal. The filtered output is used as a reference to a second phase locked loop tied to a numerically controlled oscillator and the received signal to provide a distributed phase looked loop algorithm that is wireless, and automatically synchronizes adjacent EAS systems.
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申请公布号 |
US7212117(B2) |
申请公布日期 |
2007.05.01 |
申请号 |
US20020056947 |
申请日期 |
2002.01.25 |
申请人 |
SENSORMATIC ELECTRONICS CORPORATION |
发明人 |
FREDERICK THOMAS J.;OAKES JEFFREY T. |
分类号 |
G08B13/14;G08B13/24;H03L7/07;H03L7/099 |
主分类号 |
G08B13/14 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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