Evaluation of terminal position estimation by position fingerprinting technique of radio wave using array antenna

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  • 可変指向性アンテナを用いた電波位置指紋による端末位置推定の性能評価
  • カヘン シコウセイ アンテナ オ モチイタ デンパ イチ シモン ニヨル タンマツ イチ スイテイ ノ セイノウ ヒョウカ

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Abstract

In this paper, we consider the accuracy of terminal position estimation method based on position fingerprint of radio propagation characteristic. In the technique, terminal position is estimated by pattern matching between pre-measured information at known positions and newly-measured information at a position-estimating point. As the position fingerprint, we use artificially generated RSSI variation produced by changing antenna pattern of array antenna used in transmitter and receiver. Measurement of RSSI variation is carried out in an actual indoor environment. Using the measured data, we evaluate the accuracy of the position estimation of the proposed method. However, we found the estimation accuracy is not sufficient, considering practical use. To overcome the problem, we propose a new method using multiple Access Points (APs). We show the improvement of the accuracy by using multiple APs.

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