Blind OFDM channel estimation and identification using receiver diversity
US7355958B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Oct 22, 2002 |
| Grant date | Apr 8, 2008 |
| Priority date | — |
| Expiry date | Aug 25, 2025 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L27/2601
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A method for blindly determining a channel impulse response (CIR) for a channel in an orthogonal frequency division multiplexing (OFDM) communications system includes constructing a matrix from two received signals. A singular value decomposition is performed on the matrix, which produces left and right singular matrixes. The right singular vector corresponding to the smallest singular value of the matrix is found, which yields the channel impulse response multiplied by an unknown scalar constant. The unknown scalar constant is then removed used known techniques. The method is data efficient, independent of the input symbol constellation, computationally efficient, and superior in performance compared with prior art blind algorithms.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.