公开(公告)号：US11546578B2

公开(公告)日：2023-01-03

申请号：US16976082

申请日：2019-05-06

Applicant: Intel Corporation

Inventor： Walter Bschor ,  Thushara Hewavithana ,  Boaz Kol

IPC: H04N17/04 ,  H04N21/61 ,  H04L5/14 ,  H04N21/442

Abstract: A method and apparatus for controlling a gain of an amplifier of a cable modem operating in a full duplex (FDX) mode. A cable modem includes an amplifier configured to amplify a received signal, a power meter configured to measure a power of the received signal on a plurality of channels, and a control unit configured to estimate a maximum expected power to receive on the plurality of channels based on the measured power and set a gain of the amplifier based on the maximum expected power. The cable modem is configured to operate in a full duplex mode. The channels include a full duplex upstream channel, a full duplex downstream channel, and a legacy downstream channel. The maximum expected power may be estimated via a sounding procedure. A power spectral density may be measured and the maximum expected power may be derived from the power spectral density.