发明名称 |
Cellular positioning system (CPS) |
摘要 |
Positioning system for locating a mobile body comprising a plurality of earth based spread spectrum (SS) broadcasting stations arranged geographically in a cellular pattern. Each SS broadcasting station include a modulator providing a channel signal structure which is substantially orthogonal with respect to adjacent stations in the cellular pattern, each channel signal including navigation beacon data including a unique beacon identification, station latitude and longitude, time_slot and phase characterizations and selected parameters of adjacent stations. In one embodiment, each modulator provides a chirped SS signal in which the navigation beacon is a frequency tone that is repeatedly swept over a selected frequency band for each station. In a further embodiment, each modulator provides a GPS like direct sequence SS signal in which the navigation beacon is a PN coded broadcast. A receiver on the mobile body receives the SS signals from at least three of the SS broadcasting stations and determines the location thereof. A fourth SS broadcasting station provides altitude CPS satellite signals can be used for timing control.
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申请公布号 |
USRE38808(E1) |
申请公布日期 |
2005.10.04 |
申请号 |
US20020230104 |
申请日期 |
2002.08.29 |
申请人 |
ITT MANUFACTURING ENTERPRISES, INC. |
发明人 |
SCHUCHMAN LEONARD;BRUNO RONALD;WEINBERG AARON;ENGELBRECHT LLOYD |
分类号 |
G01S1/08;G01S19/48;H04B7/185;(IPC1-7):G01S1/08;G01S5/02 |
主分类号 |
G01S1/08 |
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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