公开(公告)号：US10862715B2

公开(公告)日：2020-12-08

申请号：US15777537

申请日：2016-11-09

Applicant: Apple Inc.

Inventor： Thomas Esch ,  Mihail Petrov ,  Tobias Scholand ,  Michael Speth ,  Norbert Neurohr

IPC: H04L25/03 ,  H04L25/02 ,  H04B1/7105

Abstract: An equalizer includes: a channel estimator configured to generate a set of time-domain channel coefficients based on a receive signal; a frequency-domain transformer configured to generate a set of frequency-domain channel coefficients based on a frequency transform of the set of time-domain channel coefficients; an equalizer coefficient generator configured to generate a set of frequency-domain equalizer coefficients based on the set of frequency-domain channel coefficients; a time-domain transformer configured to generate a set of time-domain equalizer coefficients based on a time transform of the set of frequency-domain equalizer coefficients; and a filter configured to filter the receive signal based on a filter function that is based on the set of time-domain equalizer coefficients.

公开(公告)号：US20200267039A1

公开(公告)日：2020-08-20

申请号：US16648170

申请日：2018-08-28

Applicant: Apple Inc.

Inventor： Tobias Scholand ,  Jian Gu ,  Bertram Gunzelmann ,  Markus Jordan ,  Thomas Esch

IPC: H04L27/26 ,  H04L5/00

Abstract: A communication device is provided that includes a receiver configured to receive a radio frequency signal. The communication device further includes a processor configured to determine a shift frequency based on a component radio frequency signal. The processor is configured to determine a second signal based on the radio frequency signal. The component radio frequency signal is based on the radio frequency signal and associated with a frequency related to the radio frequency signal represented in the frequency domain. The second signal is determined based on shifting frequencies related to the radio frequency signal represented in the frequency domain by the shift frequency.

公开(公告)号：US20230254194A1

公开(公告)日：2023-08-10

申请号：US18301132

申请日：2023-04-14

Applicant: Apple Inc.

Inventor： Tobias Scholand ,  Jian Gu ,  Bertram Gunzelmann ,  Markus Jordan ,  Thomas Esch

IPC: H04L27/26 ,  H04L5/00

CPC classification number: H04L27/2657 ,  H04L5/0005 ,  H04L5/0053 ,  H04L5/0064 ,  H04L5/005

Abstract: A communication device is provided that includes a receiver configured to receive a radio frequency signal. The communication device further includes a processor configured to determine a shift frequency based on a component radio frequency signal. The processor is configured to determine a second signal based on the radio frequency signal. The component radio frequency signal is based on the radio frequency signal and associated with a frequency related to the radio frequency signal represented in the frequency domain. The second signal is determined based on shifting frequencies related to the radio frequency signal represented in the frequency domain by the shift frequency.