Methods, apparatus and computer program products for beacon generation and processing in an OFDM communications system
US8248959B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 29, 2007 |
| Grant date | Aug 21, 2012 |
| Priority date | — |
| Expiry date | Feb 12, 2031 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04W64/006
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
An enhanced-range beacon signal transmitted from a wireless terminal in a frequency band used by the wireless OFDM communications system for OFDM communications. The beacon may be received at each of a plurality of base stations of the wireless OFDM communications system. A location of the wireless terminal may be determined responsive to reception of the beacon signal at the plurality of base stations. In some embodiments, the beacon signal includes a narrowband beacon signal, which may be centered at a frequency offset with respect to a set of subcarriers used in the wireless OFDM communications system, for example, between adjacent subcarriers of the wireless OFDM system and/or in a guard band of the OFDM frequency band.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.