公开(公告)号：US20140266914A1

公开(公告)日：2014-09-18

申请号：US13830291

申请日：2013-03-14

Applicant: Digi International Inc.

Inventor： John Robert Schwartz ,  Terry Michael Schaffner

IPC: G01S5/06

CPC classification number: G01S5/06 ,  G01S5/0215 ,  G01S5/0273 ,  G01S5/14 ,  G01S13/876 ,  G01S13/878

Abstract: A radio frequency locator system and method. First, second and third reference devices are operable to transmit a plurality of spread spectrum chirp signals frequency offset from one another. An object device is operable to receive the plurality of spread spectrum chirp signals, the object device is further operable to evaluate the received plurality of spread spectrum chirp signals for relative phase shifts between the plurality of spread spectrum chirp signals and derive a fine propagation time between the reference devices and the object device using the phase shifts between the spread spectrum chirp signals. The reference devices determine their location independent of the object device and determine the location of the object device as a function of each of their locations and of their range to the object device.

Abstract translation: 射频定位系统及方法。 首先，第二和第三参考装置可操作地发送彼此频率偏移的多个扩展频谱啁啾信号。 对象设备可操作以接收多个扩频线性调频脉冲信号，目标设备还可操作以评估所接收的多个扩频线性调频脉冲信号，用于在多个扩展频谱啁啾信号之间进行相对相移，并导出在 参考装置和使用扩频啁啾信号之间的相移的对象装置。 参考设备确定其与对象设备无关的位置，并且根据其每个位置及其与对象设备的距离确定对象设备的位置。