Equal phase combining technique for a robust OFDM system
US8050335B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 10, 2008 |
| Grant date | Nov 1, 2011 |
| Priority date | — |
| Expiry date | Jun 3, 2030 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L27/2647
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A technique for an equal phase combining for a robust orthogonal frequency division multiplexing (OFDM) system under high delay spread channel is disclosed. In one embodiment, a method includes receiving and synchronizing transmitted OFDM symbols having cyclic prefixes via a symbol synchronizer module, removing the cyclic prefixes from the OFDM symbols, via a cyclic prefix remover module, to form time domain symbols, converting the time domain symbols to frequency domain symbols via an FFT module, equalizing a received sub-carrier with complex conjugate of estimated channel coefficients in frequency domain at the same sub-carrier frequency via an equalizer, combining the frequency domain symbols spread over multiple sub-carriers during transmission via a combiner, and detecting phase information from the mapped combined PSK constellation symbol via a detector module.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.