公开(公告)号：US20190052484A1

公开(公告)日：2019-02-14

申请号：US16152998

申请日：2018-10-05

Applicant: QUALCOMM Incorporated

Inventor： Erik David LINDSKOG ,  Ning ZHANG ,  Naveen Kumar KAKANI ,  Alireza RAISSINIA ,  Xiaoxin ZHANG

IPC: H04L25/02 ,  H04L29/06 ,  H04W12/12

Abstract: Generally, the described techniques provide for protection mechanisms for sounding training signals transmitted between wireless devices when performing ranging sounding estimation. For example, sounding training signals may be encoded to include a sequence of phase rotations or cyclic shifts to protect the sounding training signal from peer devices. In some cases, encoding information associated with a long training field (LTF) may be transmitted either before or after the LTF is transmitted. Additionally or alternatively, a time delay may be introduced to the sounding training signal, where timing information may be removed from one or more fields of the sounding training signal and the time delay may be appended to an interframe spacing. Alternatively, a frame may be split into multiple frames with the sounding training signal in a first frame, and timing information in a second frame that is offset in time from the first frame.