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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]
Range estimation techniques ,[object Object],α =path loss coeffient C=const (antenna gain,height) path loss model:
[object Object],[object Object],[object Object],Vs is the speed of sound in air at 21 ℃
Network model ,[object Object]
The overlay network is composed of three types of sensor nodes ,[object Object],[object Object],[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
[object Object],[object Object],[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 13meeting2

  • 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
  • 3.
  • 4.
  • 5.
  • 6.
  • 7.
  • 8.
  • 9. Step 1: Range Detection
  • 10.
  • 11.
  • 12.
  • 13. minimizes the mean square error by That is
  • 14.
  • 15.  
  • 16. The effect of the number of sensor nodes
  • 17.