Indoor Position Detection with High Resolution DOA Estimation Identifying Direct Waves

Hirata Akifumi, Yamada Hiroyoshi, Ohira Takashi

doi:10.1541/ieejeiss.139.900

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Other Title

直接波を特定する高分解能電波到来方向推定による屋内位置検出
チョクセツハオトクテイスルコウブンカイノウデンパトウライホウコウスイテイニヨルオクナイイチケンシュツ

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Abstract

<p>In recent years, research and development of highly accurate position detection indoors have attracted attention. In this paper, we propose a new scheme to improve accuracy of position detection indoors, identifying the direct wave between BLE transmitter (TX) and BLE receiver (RX), applying RD-CUBA-MUSIC⁽¹⁾ to indoor multi-path environment. In the proposed scheme, the direction of radio wave arrival is estimated in both directions of TX→RX and RX→TX. Estimation accuracy is improved by collating the arrival directions of the pair of two-way direct wave candidates. This Direction-Of-Arrival (DOA) estimation for direct wave is sequentially executed with a plurality of RXs and indoor position of TX is detected using the DOAs and the corresponding RX positions. In RD-CUBA-MUSIC, we select a beam pattern with high correlation with the sinc function beam pattern as a beam pattern of the ESPAR antenna. Computer simulation shows that the proposed scheme can achieve a detection accuracy within 1 m in error at a 91% probability. It also shows within 0.5 m in error at 67% even though it is in an indoor multi-path environment.</p>

Journal

IEEJ Transactions on Electronics, Information and Systems

IEEJ Transactions on Electronics, Information and Systems 139 (8), 900-909, 2019-08-01

The Institute of Electrical Engineers of Japan

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