Method and a node for detecting phase noise in MIMO communication systems
US9461773B2 · kind B2 · utility
Inventors
Key dates
| Filing date | Aug 9, 2012 |
| Grant date | Oct 4, 2016 |
| Priority date | — |
| Expiry date | Aug 9, 2032 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L2027/0067
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A method for phase noise detection in a MIMO communication system comprises the step of computing an initial estimate of phase using received pilot symbols. A phase follows for interpolating between successive pilot symbol phase estimates to obtain a coarse resolution reference phase estimate. Then, it follows a phase for computing a fine resolution estimate of phase using said coarse resolution phase estimate together with data expressing characteristics of known phase noise processes, applying an expectation maximization (EM) algorithm. The application of the EM algorithm can be further refined using improved symbol decisions from a FEC decoding.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.