Adaptive ARQ/FEC technique for multitone transmission
US5719883A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Sep 21, 1994 |
| Grant date | Feb 17, 1998 |
| Priority date | — |
| Expiry date | Sep 21, 2014 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L27/2602
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
Increased numbers of multipath transmission errors, that are detected by the performance of cyclic redundancy checking (CRC) over time and frequency on the words of a multitone transmission block that include mapped information bits, are correctable by forward error control as a result of the iterative performance of CRC over frequency on subblocks of the transmission block using retransmitted parity checking bits. A continuous record is maintained of the frequency channels that are detected as experiencing transmission errors in order to maximize the rate of data bit transmission on frequency channels that are likely to experience a reduced number of transmission errors.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.