Method and apparatus for a synchronization channel in an OFDMA system
US7706249B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 8, 2006 |
| Grant date | Apr 27, 2010 |
| Priority date | — |
| Expiry date | Aug 24, 2028 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L27/2656
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A method and apparatus is provided for transmitting an orthogonal frequency domain multiple access (OFDMA) signal including a synchronization channel signal transmitted within a localized portion of a bandwidth of the OFDMA signal (818), the synchronization channel signal having predetermined time domain symmetry within the localized portion of the bandwidth (816). The synchronization channel signal enables an initial acquisition and cell search method with low computational load which provides OFDMA symbol timing detection and frequency error detection by differential processing of sequence elements of the synchronization channel signal (1112) and frame boundary detection and cell specific information detection (1114) in an OFDMA system supporting multiple system bandwidths, both synchronized and un-synchronized systems, a large cell index and an OFDMA symbol structure with both short and long cyclic prefix length.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.