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Time and Power Based Positioning Scheme for Indoor Location Aware Services 學生 : 佑任 老師 : 劉宏煥
Reference A. El Moutia , Kia Makki , ” Time and Power Based Positioning Scheme for Indoor Location Aware Services,” CCNC 2008. 5th IEEE , 10-12 Jan. 2008 , page(s) : 868 - 872
Outline ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Indoor positioning scheme ,[object Object],[object Object],[object Object],[object Object],[object Object]
Range estimation techniques ,[object Object],Apha=path loss coeffient C=const (antenna gain,height)
[object Object],[object Object],[object Object],Vs is the speed of sound in air at 21 ℃
Network model ,[object Object]
[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Time-and-Power based Positioning Scheme ,[object Object]
Step 1: Range Detection
[object Object],C = const (consider carrier frequency and transmitted power) α = attenuation exponent rA = the distance between the mobile terminal and master sensor A sensor A estimates the received power levels and stores this information to perform averaging with a deep of I samples to increase the accuracy
The distance at time instant i can be estimated from the average received power using equation like: ,[object Object],[object Object],[object Object]
Step 2: Location Computation ,[object Object],Subtracting second and third from first
minimizes the mean square error by That is
PERFORMANCE EVALUATION ,[object Object],[object Object],[object Object]
 
The effect of the number of sensor nodes
 

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5 13meeting佑任

  • 1. Time and Power Based Positioning Scheme for Indoor Location Aware Services 學生 : 佑任 老師 : 劉宏煥
  • 2. Reference A. El Moutia , Kia Makki , ” Time and Power Based Positioning Scheme for Indoor Location Aware Services,” CCNC 2008. 5th IEEE , 10-12 Jan. 2008 , page(s) : 868 - 872
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  • 10. Step 1: Range Detection
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  • 14. minimizes the mean square error by That is
  • 15.
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  • 17. The effect of the number of sensor nodes
  • 18.