Method and apparatus for providing downlink acknowledgments and transmit indicators in an orthogonal frequency division multiplexing communication system
US8102802B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 28, 2007 |
| Grant date | Jan 24, 2012 |
| Priority date | — |
| Expiry date | Mar 28, 2027 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L5/0016
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A communication system provides downlink acknowledgments corresponding to uplink transmission using hybrid automatic repeat request to multiple users in an Orthogonal Frequency Division Multiplexing communication system, wherein a frequency bandwidth comprises multiple frequency sub-carriers, by spreading each acknowledgment of multiple acknowledgments with a selected spreading sequence of multiple spreading sequences to produce multiple spread acknowledgments, wherein each acknowledgment is intended for a different user of the multiple users, and distributing the multiple spread acknowledgments across the multiple frequency sub-carriers.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.