公开(公告)号：US11874365B2

公开(公告)日：2024-01-16

申请号：US15967244

申请日：2018-04-30

Applicant: Zebra Technologies Corporation

Inventor： David S. Wisherd ,  Robert W. Boyd

IPC: G01S13/87 ,  G01S13/75

CPC classification number: G01S13/878 ,  G01S13/75

Abstract: An example system for locating passive RFID tags includes a narrowband RFID reader configured to transmit a narrowband RF signal to energize a passive RFID tag, thereby causing the passive RFID tag to create a backscatter reflection target; a first wideband transceiver configured to transmit a wideband RF signal; a second wideband transceiver configured to: receive the wideband RF signal reflected from the backscatter reflection target; and record time-of-arrival data for the reflected wideband signal; and processing circuitry configured to determine a location measurement of the passive tag based on the time-of-arrival data.

公开(公告)号：US11231479B2

公开(公告)日：2022-01-25

申请号：US16722168

申请日：2019-12-20

Applicant: ZEBRA TECHNOLOGIES CORPORATION

Inventor： David S. Wisherd ,  James J. O'Hagan

IPC: G01S1/08 ,  G01S5/02 ,  G01S5/06

Abstract: Provided are architectures, systems, methods, and computer program products for real-time object locating and position determination using frequency channel diversity for transmitting and receiving position determination signals including bursts of location signals. Channelized frequency diversity of a short burst of small location signals that “hop” across multiple frequency channels is used to collectively produce a quasi-wideband position determination signal. Object tags operating with frequency channel diversity for transmitting location signals of position determination signals require low power consumption, but can still efficiently provide adequate position determination signals for reliable position determination.