Systems and methods for supporting both pulse amplitude modulation and quadrature amplitude modulation
US12328219B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 25, 2021 |
| Grant date | Jun 10, 2025 |
| Priority date | — |
| Expiry date | Jul 15, 2043 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L25/4921
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
Systems and devices are provided for receiving or transmitting IQ data (e.g., suitable for passband quadrature amplitude modulation (QAM)) over a wireline using pairs of baseband pulse amplitude modulation (PAM-n) signals. Encoding circuitry may map data from an input bit stream to IQ data that includes an in-phase component and a quadrature-phase component. Modulator circuitry may determine an in-phase PAM-n signal based on the in-phase component and a quadrature-phase PAM-n signal based on the quadrature-phase component. Driver circuitry may transmit the in-phase PAM-n signal and the quadrature-phase PAM-n signal across a wireline channel. The in-phase PAM-n signal may be different by 90° from the quadrature-phase PAM-n signal. This may enable a remote receiver on the wireline channel to detect the in-phase PAM-n signal independently of the quadrature-phase PAM-n signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.