发明申请
US20160366548A1 DIRECTION FINDING AND FTM POSITIONING IN WIRELESS LOCAL AREA NETWORKS
审中-公开
无线局域网中的方向寻找和FTM定位
- 专利标题: DIRECTION FINDING AND FTM POSITIONING IN WIRELESS LOCAL AREA NETWORKS
- 专利标题(中): 无线局域网中的方向寻找和FTM定位
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申请号: US15121049申请日: 2015-02-24
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公开(公告)号: US20160366548A1公开(公告)日: 2016-12-15
- 发明人: James June-Ming Wang , Jianhan Liu , Thomas Edward Pare, JR. , Tianyu Wu , Gabor Bajko , Yung-Ping Hsu
- 申请人: James June-Ming Wang , Jianhan Liu , Thomas Edward Pare Jr. , Tianyu Wu , Gabor Bajko , Yung-Ping Hsu , MEDIATEK INC.
- 国际申请: PCT/US15/17391 WO 20150224
- 主分类号: H04W4/02
- IPC分类号: H04W4/02 ; G01S5/02 ; H04W24/10 ; G01S5/06 ; H04B17/318 ; H04L5/00
摘要:
A method of combined direction finding (DF) and fine timing measurement (FTM) positioning in a wireless location area network (WLAN) is proposed. A multiple antenna IEEE 802.11 transmitting device (AP) can transmit signal preamble containing multiple Long Training Field (LTF) symbols in a radio frame from multiple antennas, which allows a receiving device (STA) to resolve multiple DF sounding signals transmitted from the multiple antennas and thereby estimating angle of departure (AoD). On the other hand, the AP can estimate angle of arrival (AoA) from radio signals transmitted from the STA. When the radial resolution error of AoD or AoA positioning increases, DF positioning and fine-timing measurement (FTM) ranging can be jointly applied to reduce the radial resolution error and extends the AoD/AoA service area with positing accuracy.