Punctured coding system for providing unequal error protection in a digital communication system
US5691992A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 12, 1995 |
| Grant date | Nov 25, 1997 |
| Priority date | — |
| Expiry date | Oct 12, 2015 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L2001/0098
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A coding system for error protecting both insignificant and significant symbols of a digital message to be transmitted from a transmitter to a receiver of a digital system. Error protection for both insignificant and significant symbols is provided by coding at the transmitter both significant and insignificant symbols of message blocks forming the digital message. The symbol rate of the coded signal to be transmitted is reduced and unequal error protection is provided to the significant symbols by puncturing a selected number of insignificant symbols of each codeword of the coded signal. At the receiver, a correction determination is made for each received codeword as to whether the erasures and errors of the received codeword are correctable. The correction determination is a function of the number of errors, number of erasures, and the minimum distance of the code. Based on this correction determination, the received codeword is depunctured and decoded.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.