Coding method and use of a receiver with a convolutional decoder
US7187728B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 23, 2001 |
| Grant date | Mar 6, 2007 |
| Priority date | — |
| Expiry date | Feb 19, 2023 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L27/3427
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A coding method for modulating carrier signals with 16 different digital states (4 bit signals) possesses a high synchronicity robustness and an at least partially improved coding gain. The coding parameters are obtained by the following steps: a) using a 2 ASK/8 PSK coding; b) choosing a convolutional code and determining all possible code word sequences with the free distance of the convolutional code; c) producing possible mappings by allocating a partial quantity of the 2 ASK/8 PSK channel bits to subsets; d) choosing the mapping at which, after determination of the optimum radii of the two amplitudes for every possible mapping, the resulting minimum Euclidean distance takes a maximum value between two possible subset sequences code word sequence.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.