Channel Coding of DGPS Transmissions for Taxi Guidance - A concept for combined Error Detection and Correction using Concatenated Codes

Thomas Mueller and Hermann Rohling

Abstract:	DGPS transmissions for aeronautical applications require high data security. The requirements are usually defined in terms of integrity and availability. For taxi guidance and landing the radio channel is characterized by multipath propagation which re- sults in f&ding. A high data security can be assured only using channel coding. Current standards for DGPS transmissions [5, 61 make use of a single code for error detection and/or forward error correction (FEC). In the SCAT-I MASPS only error detection is specified. In this paper we present a new concept for channel coding which uses concatenated codes. The outer code is used fbr pure error detection to ensure integrity. The inner code is designed for FEC. On iding chan- nels burst error correction capabilities are necessary. Computer simulations show that Reed-Solomon co- des have better performance than binary codes or interleaving techniques.
Published in:	Proceedings of the 7th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GPS 1994) September 20 - 23, 1994 Salt Palace Convention Center Salt Lake City, UT
Pages:	1315 - 1320
Cite this article:	Mueller, Thomas, Rohling, Hermann, "Channel Coding of DGPS Transmissions for Taxi Guidance - A concept for combined Error Detection and Correction using Concatenated Codes," Proceedings of the 7th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GPS 1994), Salt Lake City, UT, September 1994, pp. 1315-1320.
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