Analysis of Selected Indoor Location APs for in Wi-Fi Environments

Abstract

Abstract. Real-time indoor positioning systems based on Wi-Fi signal strength are studied. This study is about how to decide specific three target APs based on Wi-Fi RSSI signals from several APs(access point), and calculate the distance from a mobile object to the selected reference APs by ChipconCO formula. Calculated three distances are used to position the mobile object by using the triangulation method. To overcome the positioning errors, a topology which has five Aps in a square area is proposed and analyzed.

The Effect of a Hybrid Method for Indoor Location

“…The RSSI values of a receiver for various antenna directions at a 2m distance are shown. [18] The strength of a signal changes depending on time and receiver antenna direction for the same position. To get more reliable data, some of the extraordinarily weak RSSI values are eliminated, and then an average of the remaining data is used.…”

“…The chosen three closer APs based on the signals should be AP1, AP3, and AP4 [10,18]. But some abnormal situations are observed.…”

“…The need for indoor location tracking of mobile objects is increasing for a variety of applications, so various studies for location tracking are ongoing [9,10,16,18].…”

An Efficient Position Estimation of Indoor Positioning System Based on Dynamic Time Warping

“…The Received Signal Strength (RSS) -based fingerprinting localization technique is also known as scene analysis and fingerprinting, a technique that requires environmental survey to obtain features of the environment where the localization system is to be implemented [1]. This technique has called the attention of several researchers in the field of Indoor positioning system because of its advantages over the other techniques [2].…”