McGinn & Gibb, PLLC
Global positioning system
A global positioning system is provided, which ensures accurate recognition of the position of a GPS terminal even if the radio section of a GPS terminal receives the GPS radio wave affected by extrinsic noise. This system comprises (a) at least one GPS terminal for receiving a GPS radio wave transmitted from a GPS satellite and for generating positional information of the terminal based on information contained in the radio wave received; and (b) a GPS base station for detecting degradation of the GPs radio wave due to extrinsic noise and for transmitting a control signal containing information on the degradation of the radio wave to the at least one terminal. The at least one terminal conducts its operation to optimize reception condition or state of the GPS radio wave based on the control signal received. Preferably, the at least one terminal comprises a function to eliminate the degradation of the GPS radio wave due to an interference radio wave.
NEC Corporation
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Tomohiro
Fujii