Method and apparatus for allocating a pilot carrier adaptively in an orthogonal frequency division multiple access system
US7283498B2 · kind B2 · utility
27Cited by
8References
7Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 17, 2003 |
| Grant date | Oct 16, 2007 |
| Priority date | — |
| Expiry date | Apr 6, 2026 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L25/0226
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A method and apparatus for allocating pilot carriers adaptively in an OFDMA communication system are disclosed. To improve phase error estimation performance and optimize the number of pilot carriers allocated to each sub-channel, an OFDMA transmitter changes the number of pilot carriers for a sub-channel according to the status of the sub-channel. Consequently, less pilot carriers are allocated to a sub-channel in a good state, reducing power consumption and more pilot carriers are allocated to a sub-channel in a bad state, improving channel estimation performance despite increased power consumption.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.