System and method providing various pilot sub-carrier densities in OFDMA communications
US8804688B2 · kind B2 · utility
2Cited by
4References
29Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 11, 2009 |
| Grant date | Aug 12, 2014 |
| Priority date | — |
| Expiry date | Dec 21, 2031 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L25/0204
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A method for varying pilot sub-carrier density in OFDMA communications is described. The method comprises calculating channel quality from sub-carriers; determining whether the channel quality is outside a threshold range; selecting a different pilot sub-carrier density for a sub-zone based on the value of the channel quality when the channel quality is outside the threshold range; and setting the sub-zone to the different pilot sub-carrier density. A system for using sub-zones with different pilot sub-carrier densities in OFDMA communications is also described.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.