公开(公告)号：US09661455B2

公开(公告)日：2017-05-23

申请号：US14678080

申请日：2015-04-03

Applicant: ZIH Corp.

Inventor： Edward A. Richley ,  Belinda Turner ,  Chang Wang

IPC: H04W4/02 ,  H04L12/24 ,  H04B1/16 ,  G01S5/02

CPC classification number: G01S5/06 ,  G01S5/021 ,  G01S5/0236 ,  H04B1/16 ,  H04L41/0803 ,  H04W4/02

Abstract: Systems, methods, apparatuses, and computer readable media are disclosed for improving, in some examples, reference in a location system. In one embodiment, a method is provided comprising: receiving reference tag blink data from a plurality of receivers; calculating, using a processor, a reference phase offset between the plurality of receivers; and generating a suspended reference phase offset table, wherein a suspended reference phase offset table is generated by causing the reference phase offset to be stored in a memory for later tag location calculations.

公开(公告)号：US20160097837A1

公开(公告)日：2016-04-07

申请号：US14729761

申请日：2015-06-03

Applicant: ZIH Corp.

Inventor： Edward A. Richley ,  Belinda Turner ,  Chang Wang

IPC: G01S5/06 ,  G01S5/02

CPC classification number: G01S5/06 ,  G01S5/02 ,  G01S5/0215 ,  G01S5/0221

Abstract: The present invention provides methods for an active RFID tag target location system that provides for an iterative recalculating of a target location estimate by successively testing receiver TOA and DTOA error measurements and discarding outlier receivers. The present invention works to reduce the erratic effects that multipath channel interference and random noise play in target location systems due to incorrect identification of the main pulse of the transmit signal. In addition to providing for a greater accuracy and consistency in a TOA-based target location system, the method also provides for an opportunity to reduce a transmission bandwidth associate with the TOA transmission by the multiple receivers. The method may be considered a post-processing element, as the determination of TOA and DTOA may require a real-time calculation, where the timing constraints for the ensuing target location estimate may be less severe.

Abstract translation: 本发明提供了一种用于有源RFID标签目标定位系统的方法，该系统通过连续测试接收机TOA和DTOA误差测量并丢弃异常值接收机来提供目标位置估计的迭代重新计算。 本发明用于减少由于发送信号的主脉冲的不正确识别导致的目标定位系统中的多径信道干扰和随机噪声播放的不稳定效应。 除了在基于TOA的目标定位系统中提供更高的精度和一致性之外，该方法还提供了减少由多个接收机与TOA传输相关联的传输带宽的机会。 该方法可以被认为是后处理元件，因为TOA和DTOA的确定可能需要实时计算，其中随后的目标位置估计的时序约束可能不太严重。