公开(公告)号：US11722171B2

公开(公告)日：2023-08-08

申请号：US17455437

申请日：2021-11-18

Applicant: NXP B.V.

Inventor： Diwakar Subraveti ,  Abdul Wahid Abdul Kareem ,  Shengyang Xu ,  Atmaram Kota Rajaram ,  Ajay A Jampale

IPC: H04B1/7176 ,  H04B1/7183

CPC classification number: H04B1/7176 ,  H04B1/7183

Abstract: UWB ranging methods and apparatus are disclosed. The method comprises a ranging communication with a plurality of responder devices, the ranging communication comprising: transmitting, by an initiator device, a polling signal in a time slot; receiving a respective response from each of the plurality of responder devices, overlapping and in a next time slot, each response comprising: synchronization bits, and a frame comprising Start of Frame Delimiter, and a Scrambled Timestamp Sequence; wherein the STS comprises a sequence of segments each preceded by a respective guard interval, wherein a specific one of the segments comprises data derived from a ranging key and a responder-identifier each unique to the respective responder among the plurality of responders, wherein a sequence-number of the specific segment is unique to the respective response, and wherein a remainder of the segments each comprise the same data derived from a predetermined common key and predetermined common data.