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    • 1. 发明申请
    • Asynchronous communication system for remote monitoring of objects or an environment
    • 用于远程监控对象或环境的异步通信系统
    • US20060034348A1
    • 2006-02-16
    • US10915576
    • 2004-08-10
    • Timothy SchaeferJonathan CokerRick PhilpottEdward WelchDavid Holmes
    • Timothy SchaeferJonathan CokerRick PhilpottEdward WelchDavid Holmes
    • H04B1/69
    • H04B1/707H04J13/16
    • 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.
    • 一种系统提供了在基站和一个或多个转发器之间使用异步码分多址(CDMA)通信技术的远程监控。 每个应答器被连接或以其他方式与要监视的对象或环境相关联。 在接收到询问信号时,应答器产生并发送包含监视数据的编码的应答器信号。 使用扩展码产生编码的应答器信号。 每个转发器与唯一的,相互排斥的扩展码组相关联。 每个扩展码基于唯一的应答器地址和要发送的监视数据。 检测器异步监视任何可用扩展码的接收信号。 一旦检测器检测到特定的扩展码,基站可以识别源应答器并提取监视的数据。