Channel estimation for multi-carrier communication
US8619746B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 10, 2006 |
| Grant date | Dec 31, 2013 |
| Priority date | — |
| Expiry date | Nov 27, 2028 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L25/025
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
Techniques for deriving a channel estimate using a scattered pilot and a continual pilot are described. The scattered pilot is sent on different sets of carriers in different symbol periods. The continual pilot is sent in each symbol period on irregularly spaced carriers. The scattered pilot is used to identify the indices of channel taps of interest, e.g., L strongest channel taps. The continual pilot is used to determine the complex gains of these L channel taps. A receiver derives a channel impulse response estimate based on received pilot symbols for the scattered pilot, identifies the L strongest channel taps, and determines the indices of these L strongest channel taps. The receiver forms a Fourier sub-matrix based on the L tap indices and determines the gains of the L channel taps based on received pilot symbols for the continual pilot and the Fourier sub-matrix.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.