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.
|
申请公布号 |
US6111538(A) |
申请公布日期 |
2000.08.29 |
申请号 |
US19950393312 |
申请日期 |
1995.02.23 |
申请人 |
STANFORD TELECOMMUNICATIONS, INC. |
发明人 |
SCHUCHMAN, LEONARD;BRUNO, RONALD;ENGELBRECHT, LLOYD;WEINBERG, AARON |
分类号 |
G01S1/00;G01S5/14;G01S19/09;G01S19/46;G01S19/48;H04B1/69;H04W4/06;H04W28/04;H04W48/08;H04W64/00;H04W72/12;H04W84/04;(IPC1-7):H04B7/185;G01S5/02 |
主分类号 |
G01S1/00 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|