Abstract
To improve the performance of satellite navigation by using error messages, an enhanced error correcting method based on CRC code was proposed. The CRC-24 error checking code of navigation message was used to correct one-bit error pattern. The minimum hamming weight and error correcting capability of CRC-24 code were proved by mathematical analysis and computer searching. The performance improvement of navigation using CRC correction was analyzed based on message format and the model of error bit distribution. A low complexity implementation was schemed based on looking-up table. The performance of enhanced error correcting was simulated with GPS CNAV navigation message. The results show that the CRC-assisted correction can reduce frame error ratio by 1~2 orders of magnitude. Without changing the signal structure of navigation message, the reliability of navigation is improved by using the enhanced correction.
| Original language | English |
|---|---|
| Pages (from-to) | 748-751 |
| Number of pages | 4 |
| Journal | Beijing Ligong Daxue Xuebao/Transaction of Beijing Institute of Technology |
| Volume | 34 |
| Issue number | 7 |
| Publication status | Published - 1 Jul 2014 |
Keywords
- Cyclic redundancy check code
- Enhanced error correcting
- Frame error ratio
- One bit error pattern
- Satellite navigation message