公开(公告)号：US11722981B2

公开(公告)日：2023-08-08

申请号：US17444008

申请日：2021-07-29

Applicant: Cisco Technology, Inc.

Inventor： Brian D. Hart ,  Ardalan Alizadeh ,  Daniel J. Lyons ,  Matthew A. Silverman

IPC: H04W56/00 ,  H04L27/26

CPC classification number: H04W56/0095 ,  H04L27/2657

Abstract: Aspects discussed herein include a method and associated network device and computer program product. The method includes receiving a network packet, and estimating, using a preamble of the network packet, a power distribution corresponding to a plurality of subcarriers of a channel. The method further includes estimating a carrier frequency offset using the power distribution, and estimating a clock offset using the carrier frequency offset.

公开(公告)号：US10693512B1

公开(公告)日：2020-06-23

申请号：US16457588

申请日：2019-06-28

Applicant: Cisco Technology, Inc.

Inventor： Khashayar Mirfakhraei ,  Ardalan Alizadeh ,  Xu Zhang ,  Gautam D. Bhanage ,  Daniel J. Lyons ,  Brian D. Hart

IPC: H03D1/04 ,  H03D1/06 ,  H03K5/01 ,  H03K6/04 ,  H04B1/10 ,  H04L1/00 ,  H04L25/08 ,  H04B1/12 ,  H04B1/04 ,  H04B1/18

Abstract: The present disclosure provides for distortion cancelled by receiving a collided signal comprising first and second signals carrying respective first and second packets; digitizing the collided signal into a first digital signal and decoding the first packet therefrom; calculating a digital linear interference component of the first packet on the second from an estimated signal re-encoding the decoded first packet; synthesizing an analog linear interference component from the digital linear interference component; determining a digital nonlinear interference component of the first packet on the second from the first digital signal; amplifying the collided signal to produce a second amplified signal; removing the analog linear interference component from the second amplified signal to produce a partially de-interfered signal; removing the digital nonlinear interference component from the partially de-interfered signal to produce a de-interfered signal; and decoding the second packet from the de-interfered signal.