公开(公告)号：US20160116566A1

公开(公告)日：2016-04-28

申请号：US14989389

申请日：2016-01-06

Applicant: ZIH CORP.

Inventor： ROBERT W. BOYD

IPC: G01S5/06 ,  H04W64/00 ,  G01S5/02

CPC classification number: G01S5/06 ,  G01S5/021 ,  G01S5/0215 ,  G01S5/0221 ,  H04W64/00 ,  H04W84/12

Abstract: Systems and methods for determining signal source location in wireless local area networks are disclosed. An example method includes receiving, from a first signal reader, a first time-of-arrival measurement for a first radio frequency (RF) signal generated by a first wireless local area network (WLAN) signal source located at a first known location, the first time-of-arrival measurement being relative to a first clock of the first signal reader; receiving, from a second signal reader, a second time-of-arrival measurement for the RF signal, the second time-of-arrival measurement being relative to a second clock of the second signal reader, wherein the first clock is not synchronized with the second clock; defining a first time relationship between the first clock and a system time based on the first time-of-arrival measurement; and defining a second time relationship between the second clock and the system time based on the second time-of-arrival measurement.

Abstract translation: 公开了用于确定无线局域网中的信号源位置的系统和方法。 示例性方法包括从第一信号读取器接收由位于第一已知位置处的第一无线局域网（WLAN）信号源产生的第一射频（RF）信号的第一到达时间测量， 第一到达时间测量值相对于第一信号读取器的第一时钟; 从所述第二信号读取器接收所述RF信号的第二到达时间测量值，所述第二到达时间测量值相对于所述第二信号读取器的第二时钟，其中所述第一时钟不与所述第二时钟同步 第二时钟 基于所述第一到达时间测量来定义所述第一时钟和系统时间之间的第一时间关系; 以及基于所述第二到达时间测量来定义所述第二时钟和所述系统时间之间的第二时间关系。