发明授权
- 专利标题： Asynchronous communication system for remote monitoring of objects or an environment
- 专利标题（中）： 用于远程监控对象或环境的异步通信系统
-
申请号： US12622539申请日： 2009-11-20
-
公开(公告)号： US07830948B2公开(公告)日： 2010-11-09
- 发明人: Timothy Michael Schaefer , Jonathan Darrel Coker , Rick Allen Philpott , Edward Brian Welch , David R. Holmes, III
- 申请人： Timothy Michael Schaefer , Jonathan Darrel Coker , Rick Allen Philpott , Edward Brian Welch , David R. Holmes, III
- 申请人地址： US MN Rochester
- 专利权人： Mayo Foundation for Medical Education and Research
- 当前专利权人： Mayo Foundation for Medical Education and Research
- 当前专利权人地址： US MN Rochester
- 代理机构： Shumaker & Sieffert, P.A.
- 主分类号： H04L27/30
- IPC分类号： H04L27/30
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.