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To: james-rockford who wrote (752)7/13/2001 3:00:18 AM
From: DEER HUNTER  Read Replies (1) of 1129
 
Applications of GPS Technology in Indoor Environment

ntu.edu.sg

The positioning accuracy of GPS is good enough for developing navigation system in outdoor environment. The working principle of GPS can be extended to indoor environment with the introduction of the concept of "pseudo satellite". But, more stringent requirement on positioning accuracy is imposed for GPS technology in indoor environment

Principle

Pseudo Satellites can be regarded as mini satellites used for object positioning in an indoor environment. It is developed as a transmitter that is mounted on the ceiling and has the intrinsic function of transmitting radio signals. The principle of pseudo satellite-based positioning system is directly derived from global positioning technology for outdoor environment. The system is able to "triangulate" the position of an object by accurately measuring the distances from the object to the pseudo satellites.

Applications

Pseudo satellite-based positioning systems are designed for accurate positioning of mobile systems or human in indoor environment. Highly accurate positioning (sub-centimeter) with pseudo satellite-based positioning system provides a simple and easy way to capture the position or motion of mobile systems or human needed for the execution of tasks such as trajectory planing, gesture tracking and object localization in indoor environment.
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