Detecting redundant digital codewords using a variable criterion
US4404677A · kind A · utility
9Cited by
4References
18Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 8, 1981 |
| Grant date | Sep 13, 1983 |
| Priority date | — |
| Expiry date | Apr 8, 2001 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L1/08
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
Fast response detection of repeatedly transmitted redundant digital codewords is provided by checking the same bit-position in consecutive n bit codewords. The number m of codewords checked is increased until the number of equal bit values reaches a varying threshold j.sub.m dependent upon m, or until m reaches a maximum M. This sequence is repeated for each of the remaining bit-positions of the codeword. Faster response is provided when an early threshold is reached, eliminating the need to continue checking the same bit-position in the remainder of the M codewords.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.