Fig. 1. Worldwide LBS market sales account trends
Fig. 2. Coverage and accuracy of Indoor positioning
Fig. 3. Integration module overall configuration
Fig. 4. Ultrasonisc wave sensor circuit design
Fig. 5. Power circuit design
Fig. 6. Beacon circuit design
Fig. 7. Integration module
Fig. 8. Measures according to distance
Fig. 9. Standard deviation of measured values
Fig. 10. Measured value distribution in 9M-8M space
Fig. 11. Measured value distribution in 2M-5M space
Fig. 12. Measured value distribution in 6M-7M space
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