Correcting Burst-Errors for Wide Area Augmentation System Applications

Kerwin R. Holmes Sr. and Behnam Kamali

Abstract:	Flights were conducted in and around Juneau, Alaska and Palo Alto, California. Some of the flight maneuvers included 60-degree banks from side-to-side to stress the geostationary communication satellite link of the Wide Area Augmentation System (WAAS). Burst-errors occurred for flights that had bank angles ranging between 5 and 60-degrees. It has been observed that as the range of bank angles increase, so does the length of the sequence of lost symbols. To mitigate the effect of Burst-errors, thus improving the integrity of the signal, we are proposing that the current cyclic redundancy check (CRC) coding scheme in WAAS be replaced with a (250,226) shortened Reed-Solomon (SRS) code. The MATLAB simulation models indicate that this scheme outperforms the current WAAS coding configuration by more than 2 dB, while keeping approximately the same overall coding rate.
Published in:	Proceedings of the 17th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GNSS 2004) September 21 - 24, 2004 Long Beach Convention Center Long Beach, CA
Pages:	2254 - 2258
Cite this article:	Holmes, Kerwin R., Sr., Kamali, Behnam, "Correcting Burst-Errors for Wide Area Augmentation System Applications," Proceedings of the 17th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GNSS 2004), Long Beach, CA, September 2004, pp. 2254-2258.
Full Paper:	ION Members/Non-Members: 1 Download Credit Sign In