公开(公告)号：US20230179449A1

公开(公告)日：2023-06-08

申请号：US18166619

申请日：2023-02-09

Applicant: Hewlett Packard Enterprise Development LP

Inventor： Nitin A. CHANGLANI ,  Farhan HASNAIN ,  Eldad PERAHIA ,  Deven PATEL

IPC: H04L25/02 ,  H04L25/06 ,  H04L5/00

CPC classification number: H04L25/0224 ,  H04L25/063 ,  H04L5/0007

Abstract: Systems and techniques are described that are directed to filter frequency response shift compensation, including compensating for shifting in the rejection band of the filter. Compensation for the shifting in the rejection band can include applying a pre-distortion to attenuate edge resource units (RUs), and applying PHY Protocol Data Unit (PPDU) scheduling schemes. For example, a PPDU scheduling scheme reduce bandwidth in the channel, thereby dropping the out of band RUs. Front ends provide feedback to a respective radio, which allows that radio to apply the appropriate pre-distortion. The front ends can include one or more filters enabling frequency domain coexistence between collocated radios operating in the differing Wi-Fi bands, and a coupler that provides the feedback indicating the frequency response shift to a radio. The radio can then apply a digital pre-distortion to compensate for the shifting in the rejection band.