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Volume : II, Issue : VII, August - 2012 Implementation of Turbo Codes in AWGN Channel Rupesh Singh nd Nidhi Singh DOI : 10.9780/22307850, Published By : Laxmi Book Publication Abstract : The field of forward error correction was greatly influenced by the discovery of turbo
codes. This invention led to a great improvement in terms of Bit-Error-Rate (BER).
Various schemes have been proposed and are based either on parallel or serial designs
of concatenated decoders. These decoders are iterative using SOVA (soft output viterbi
Algorithm) or MAP (maximum a posteriori) algorithms. They introduce superior
recovery functions of data which have been transmitted through noisy environments.
Actually, these turbo schemes compared to convolutional codes achieve better data
recovery with the increase of the constraint length. This paper shows the Turbo encoder
and SOVA Decoder Implementation by Simulation carried out for different Bit Error
Rates, iterations, constrained lengths and Frame sizes in Additive White Gaussian Noise
Channels. Keywords : Article : Cite This Article : Rupesh Singh nd Nidhi Singh, (2012). Implementation of Turbo Codes in AWGN Channel. Indian Streams Research Journal, Vol. II, Issue. VII, DOI : 10.9780/22307850, http://oldisrj.lbp.world/UploadedData/1271.pdf References : - C. Berrou, A. Glavieux and P. Thitimajshima, “Near Shannon limit error-correcting coding and decoding: Turbo-codes. 1,” in Proceedings of the IEEE International Conference of Communications ICC 93, IEEE, Geneva, 23-26 May 1993, pp. 1064–1070.
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