Methods and apparatus for multi-carrier communications with variable channel bandwidth
US7787431B2 · kind B2 · utility
Inventors
Key dates
| Filing date | Apr 29, 2005 |
| Grant date | Aug 31, 2010 |
| Priority date | — |
| Expiry date | Aug 9, 2026 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04W76/10
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
Methods and apparatus for multi-carrier communication with variable channel bandwidth are disclosed, where the time frame structure and the OFDM symbol structure are invariant and the frequency-domain signal structure is flexible. In one embodiment, a mobile station, upon entering a geographic area, uses a core-band to initiate communication and obtain essential information and subsequently switches to full operating bandwidth of the area for the remainder of the communication. If the mobile station operates in a wide range of bandwidths, the mobile station divides the full range into sub-ranges and adjusts its sampling frequency and its FFT size in each sub-range.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.