Method and apparatus for estimating a channel based on channel statistics
US7308232B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jun 21, 2002 |
| Grant date | Dec 11, 2007 |
| Priority date | — |
| Expiry date | May 21, 2025 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L25/0202
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A method and apparatus are disclosed for equalizing a channel using improved channel estimates. The present invention assumes that fading will follow a statistical model and obtains an improved channel estimate using one or more basis functions to describe the channel based on known channel statistics. A Karhunen-Loeve expansion can be used for channel estimation to describe the channel. Waveforms are selected that are matched to characteristics of the channel, such as transmission waveforms whose energy is largely restricted to a bandwidth assigned to the channel. Coefficients are estimated for the basis functions using real-time data.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.