在 802.11a 與 802.11b混合環境下的室內定位

Abstract

隨著各種行動通訊計算設備與無線網路的普及，人們可以隨時隨地透過無線網路連結 Internet 或特定區域網路，在這同時與定位相關的服務也成為一個有趣的課題。為了更精準提供位置相關的服務，定位的的精準度是必要考慮的因素。本篇論文則是討論在 802.11a 與 802.11b 混合的環境下，如何有效地增加定位方法的精準度。在本篇論文中，利用 802.11a 與 802.11b 頻率特性的不同，分別採用機率、 RADAR 等方法做分析。更進一步同時混合使用 802.11a 跟 802.11b 的 AP 訊號，來進行 802.11a, 802.11b , 802.11a + 802.11b 等比較。另外針對 802.11a + 802.11b 混合訊號源，採用權重與內插等方式來增加 802.11a + 802.11b 的定位精準度

Wireless communications have advanced rapidly in recent years. People could access Internet services everywhere and anytime. During these years, Location Based Service (LBS) would be an interesting topic. In order to provide Location Based Services, the wireless indoor positioning would be the most important subject.

In this work, we use 802.11a and 802.11b as interfaces to improve the accuracy of indoor Positioning. We use mixed input signals from 802.11a and 802.11b at the same time to compare to the result with only 802.11a or 802.11b input signals. We also propose weighted method and interpolation method to improve the accuracy of indoor positioning.