Range extension and noise mitigation for wireless communication links utilizing a CRC based single and multiple bit error correction mechanism
US8255754B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 12, 2008 |
| Grant date | Aug 28, 2012 |
| Priority date | — |
| Expiry date | Mar 10, 2031 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L1/0061
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A novel and useful range extension and in-band noise mitigation mechanism that uses conventional CRC error detection codes to correct single and multiple bit errors in packets received over a communications link. The CRC error correction mechanism of the invention is particularly suitable for use with communication protocols with weak error correction capabilities. The mechanism uses the linearity property of the CRC calculation to detect the existence of errors in the received packet. The entire received packet is searched for single bit errors and are corrected in a single cycle. If no single bit errors are found, the mechanism then searches for multiple bit errors. Packet retransmissions are used to detect and mark the location of multiple bit errors. Multiple bit errors are corrected by trying a plurality of hypotheses of single bit error corrections. Each hypotheses pattern is investigated to find matching CRC patterns for correction using the single bit, single cycle CRC error correction method.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.