Invention Grant
- Patent Title: Methods and systems for filter frequency response shift compensation for WLAN traffic
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Application No.: US17245866Application Date: 2021-04-30
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Publication No.: US11606228B2Publication Date: 2023-03-14
- Inventor: Nitin A. Changlani , Farhan Hasnain , Eldad Perahia , Deven Patel
- Applicant: HEWLETT PACKARD ENTERPRISE DEVELOPMENT LP
- Applicant Address: US TX Houston
- Assignee: HEWLETT PACKARD ENTERPRISE DEVELOPMENT LP
- Current Assignee: HEWLETT PACKARD ENTERPRISE DEVELOPMENT LP
- Current Assignee Address: US TX Houston
- Agency: Sheppard Mullin Richter & Hampton LLP
- Main IPC: H03H9/64
- IPC: H03H9/64 ; H04L25/02 ; H04L25/06 ; H04L5/00

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.
Public/Granted literature
- US20220353110A1 METHODS AND SYSTEMS FOR FILTER FREQUENCY RESPONSE SHIFT COMPENSATION FOR WLAN TRAFFIC Public/Granted day:2022-11-03
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