公开(公告)号：US11133915B2

公开(公告)日：2021-09-28

申请号：US16601611

申请日：2019-10-15

Applicant: MaxLinear, Inc.

Inventor： Boaz Kol ,  Noam Tal ,  Shaul Shulman ,  Thushara Hewavithana

IPC: H04L5/14 ,  H04B3/21 ,  H04L27/00 ,  H04L27/148

Abstract: A cable modem supporting full duplex (FDX) operations. The cable modem includes a transmit circuitry configured to process a transmit signal and a receive circuitry configured to process a receive signal. The receive circuitry includes a switchable analog filter configured to filter the receive signal. The switchable analog filter is configurable for different passband frequencies. The receive circuitry also includes a digital compensation filter configured to compensate a difference in frequency response in a specific frequency band due to switching of the switchable analog filter for a different passband frequency. The cable modem also includes an adjacent channel interference (ACI) cancellation filter and an adjacent leakage interference (ALI) cancellation filter. A digital compensation filter is also used in processing the ACI cancellation signal and the ALI cancellation signal to impose or compensate the difference in frequency response due to the switchable analog filter switching.