Estimating a transmission channel with pilot symbols distributed in lattice structure
US7310378B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 18, 2002 |
| Grant date | Dec 18, 2007 |
| Priority date | — |
| Expiry date | May 16, 2024 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L27/2698
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A method for estimating a transmission channel from a multicarrier signal transmitted through said transmission channel, comprising real pilot symbols and so-called pure imaginary pilot symbols, consists in selecting one or several values zk of the received signal corresponding respectively to one or several real pilot symbols, and one or several values zl of the received signal corresponding respectively to one or several pure imaginary pilot symbols. The pilot symbols are sufficiently close both in frequency and in time such that it can be assumed that the fading of the signal through the transmission channel has a complex value α substantially identical for the symbols. An estimated value {circumflex over (α)} of α for the pilot symbols concerned is then determined by minimizing a least square equation involving the values zk and the values zl.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.