Modelling the Effect of Human Body around User on Signal Strength and Accuracy of Indoor Positioning

  • Firdaus Universiti Teknologi Malaysia (UTM), Kuala Lumpur
  • Noor Azurati Ahmad Universiti Teknologi Malaysia (UTM), Kuala Lumpur
  • Shamsul Sahibuddin Universiti Teknologi Malaysia (UTM), Kuala Lumpur
  • Rudzidatul Akmam Dziyauddin Universiti Teknologi Malaysia (UTM), Kuala Lumpur

Abstract

WLAN indoor positioning system (IPS) has high accurate of position estimation and minimal cost. However, environmental conditions such as the people presence effect (PPE) greatly influence WLAN signal and it will decrease the accuracy. This research modelled the effect of people around user on signal strength and the accuracy. We have modelled the human body around user effects by proposed a general equation of decrease in RSSI as function of position, distance, and number of people. RSSI decreased from 5 dBm to 1 dBm when people in LOS position, and start from 0.5 dBm to 0.3 dBm when people in NLOS position. The system accuracy decreases due to the presence of people. When the system in NLOS case (ΔRSSI = 0.5 dBm), the presence of people causes a decrease in accuracy from 33% to 57%. Then the accuracy decrease from 273% to 334% in LOS case (ΔRSSI = 5 dBm).

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Published
09-08-2020
How to Cite
Firdaus, Ahmad, N. A., Sahibuddin, S., & Dziyauddin, R. A. (2020). Modelling the Effect of Human Body around User on Signal Strength and Accuracy of Indoor Positioning. International Journal of Integrated Engineering, 12(7), 72-80. Retrieved from https://publisher.uthm.edu.my/ojs/index.php/ijie/article/view/6602