Quasi-parallel multichannel receivers for wideband orthogonal frequency division multiplexed communications and associated methods
US7885178B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 29, 2003 |
| Grant date | Feb 8, 2011 |
| Priority date | — |
| Expiry date | Nov 14, 2028 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L27/26538
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A quasi-parallel receiver may simultaneously receive signals within several subchannels that comprise a wideband channel. The receiver includes a subchannel filter selection switch that provides a baseband signal to a selected one of a plurality of subchannel low-pass filters. A heterodyne frequency generator provides one of a plurality of heterodyne frequencies to convert an RF signal received within a selected subchannel to the baseband signal. The subchannel low-pass filters accumulate signal information from an associated one of a plurality of subchannels during a filter-input sampling interval. In some embodiments, individual analog-to-digital converters receive the accumulated signal outputs from an associated subchannel filter and generate digital signals for a subsequent Fourier transformation. In some embodiments, a normalized signal output may be provided to the analog-to-digital converters, allowing the use of lower resolution analog-to-digital converters. The analog-to-digital converters may have sampling rates based on the subchannel bandwidth.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.