发明名称 |
Personal digital assistant having satellite communications capacity |
摘要 |
Systems and methods are disclosed for utilizing personal digital assistants in a portable communications system. A personal digital assistant includes a global positioning system module, an L-band transceiver, and a processing system. The global positioning system module produces location information associated with the position of the personal digital assistant. The L-band transceiver broadcasts the location information to a network of at least one other personal digital assistant and receives location information from at least one other personal digital assistant within the network via a communications satellite. The processing system provides messages to the L-band transceiver and updates a display associated with the personal digital assistant according the received location information and the location information produced at the global positioning system module. |
申请公布号 |
GB0417169(D0) |
申请公布日期 |
2004.09.01 |
申请号 |
GB20040017169 |
申请日期 |
2004.08.02 |
申请人 |
NORTHROP GRUMMAN CORPORATION |
发明人 |
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分类号 |
G01C21/00;G01S19/34;G01S19/48;G06F1/16;H04L29/00;H04W60/00 |
主分类号 |
G01C21/00 |
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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