发明授权
- 专利标题: Interference suppression for wireless local area network and location system
- 专利标题(中): 无线局域网和定位系统的干扰抑制
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申请号: US10033529申请日: 2001-12-28
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公开(公告)号: US06892054B2公开(公告)日: 2005-05-10
- 发明人: Donald K. Belcher , Robert W. Boyd , Michael A. Wohl
- 申请人: Donald K. Belcher , Robert W. Boyd , Michael A. Wohl
- 申请人地址: US CA Santa Clara
- 专利权人: WhereNet Corp
- 当前专利权人: WhereNet Corp
- 当前专利权人地址: US CA Santa Clara
- 代理机构: Allen, Dyer, Doppelt, Milbrath & Gilchrist, P.A.
- 主分类号: H04B7/08
- IPC分类号: H04B7/08 ; H04L12/28 ; H04B1/10 ; H04B15/00
摘要:
A wireless local area network and location system for locating objects within a monitored environment are disclosed. A plurality of access point stations receive and transmit communication signals within a wireless local area network. A processor is operatively connected to each of the access point stations and operative for processing communication signals received from the mobile station and, in one embodiment, determining which communication signals are first-to-arrive signals and conducting differentiation of the first-to-arrive signals to locate a mobile station. Delayed versions of at least one interference signal are weighted and the amplitude and phase controlled with weighted functions W1, W2 . . . Wn. The resultant weighted replicas are summed to determine an approximation of disbursed interference for cancelling interference. The location system can include a tag transmitter and spaced monitoring receivers and processor.