Method and apparatus for achieving system acquisition and other signaling purposes using the preamble in an OFDM based communications system
US7693031B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 2, 2007 |
| Grant date | Apr 6, 2010 |
| Priority date | — |
| Expiry date | May 6, 2028 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L27/26136
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
In the system acquisition process system information is non-coherently detected using correlation of reconstructed and received preamble signals, such as the primary broadcast control channel (PBCCH) and the acquisition pilots (TDM1, TDM2, and TDM3). The phase correlation signals between the correlated signals of PBCCH and TDM2 or TDM3 and between the correlated signals of TDM2 and TDM3 are combined to decode other sector interference (OSI) information and the like. Acquisition is also made more efficient by taking advantage of predictable information based on system synchronicity. The sync/async bit is included in at least one of the acquisition pilots. The mobile then uses knowledge of system synchronicity to more efficiently detect the additional information in the superframe preamble.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.