发明名称 |
Asynchronus communication system for remote monitoring of objects or an environment |
摘要 |
A system provides for remote monitoring using asynchronous code division multiple access (CDMA) communication techniques between a base station and one or more transponders. Each transponder is attached or otherwise associated with an object or an environment to be monitored. Upon receipt of an interrogation signal, a transponder generates and transmits a coded transponder signal containing the monitored data. The coded transponder signal is generated using a spreading code. Each transponder is associated with a unique, mutually exclusive set of spreading codes. Each spreading code is based on a unique transponder address and the monitored data to be sent. A detector asynchronously monitors received signals for any of the available spreading codes. Once the detector detects a particular spreading code, the base station can identify the source transponder and extract the monitored data.
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申请公布号 |
US7643536(B2) |
申请公布日期 |
2010.01.05 |
申请号 |
US20040915576 |
申请日期 |
2004.08.10 |
申请人 |
MAYO FOUNDATION FOR MEDICAL EDUCATION AND RESEARCH |
发明人 |
SCHAEFER TIMOTHY MICHAEL;COKER JONATHAN DARREL;PHILPOTT RICK ALLEN;WELCH EDWARD BRIAN;HOLMES, III DAVID R. |
分类号 |
H04B1/00 |
主分类号 |
H04B1/00 |
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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