System and method for determining quasi-cyclic low-density parity-check codes having high girth
US8499218B2 · kind B2 · utility
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Key dates
| Filing date | Sep 30, 2011 |
| Grant date | Jul 30, 2013 |
| Priority date | — |
| Expiry date | Jan 26, 2032 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03M13/6544
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A method estimates parameters of 3-phase voltage signals to synchronize a power grid in a presence of a voltage unbalance by transforming the 3-phase voltage signals to αβ-reference signals using a Clarke transformation matrix, and estimating sinusoidal signals and corresponding quadrature signals of the αβ-reference signals using an extended Kalman filter, and determining a phase angle of a positive sequence based on a relationship of the phase angle to the estimated the sinusoidal signals.
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