Linear feedback sequence detection with error correction
US4747105A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 3, 1986 |
| Grant date | May 24, 1988 |
| Priority date | — |
| Expiry date | Sep 3, 2006 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L7/048
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A detector locates a shift register sequence within a digital data stream by correlating the data stream with a sequence generated locally from a portion of the data stream. Error correction circuitry estimates errors that may have corrupted the sequence during transmission across a noisy channel and corrects them to the extent possible. The data stream and local sequence are correlated during an interval that is shifted either ahead or behind the portion of the error-corrected data stream used to initialize the local sequence generator, thereby avoiding the region during which short-term correlation between the data stream and local sequence would otherwise cause false indications of detection when only noise or random data is being received.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.