Preprocessing signal layers in a layered modulation digital signal system to use legacy receivers
US7245671B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 5, 2002 |
| Grant date | Jul 17, 2007 |
| Priority date | — |
| Expiry date | Jan 2, 2024 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L27/3488
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
Systems and methods for receiving non-coherent layered modulation signals are presented. An exemplary apparatus comprises a tuner for receiving a layered signal and producing a layered in-phase signal and a layered quadrature signal therefrom, an analog-to-digital converter for digitizing the layered in-phase signal and the layered quadrature signal, a processor for decoding the layered in-phase signal and the layered quadrature signal to produce a single layer in-phase signal and a single layer quadrature signal, a digital-to-analog encoder for converting the single layer in-phase signal and the single layer quadrature signal to a single layer in-phase analog signal and a single layer quadrature analog signal and a modulator for modulating the single layer in-phase analog signal and the single layer quadrature analog signal to produce a single layer signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.