Probabilistic fade forecasting
US4835772A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 6, 1988 |
| Grant date | May 30, 1989 |
| Priority date | — |
| Expiry date | Jan 6, 2008 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03M13/6337
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A block of helically interleaved codewords is received in a de-interleaving array. A succession of codewords obtained from the de-interleaving array are decoded in a process in which each error pattern in a given codeword position provides a prediction of the presence or absence of an erasure in the adjacent codeword position of the next codeword. This prediction is obtained by addressing a look-up table with the error pattern. In one embodiment of the invention, the erasure prediction is computed recursively from previous erasure predictions using individual skepticism factors and forgetting factors for each codeword symbol position.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.