Performance Analysis of Turbo Codes Using CRC and FC with OFDM
DOI:
https://doi.org/10.26438/ijcse/v5i12.2328Keywords:
Turbo Codes, MAP, MAX Log MAP, Cyclic Redundancy Check, Flip and Check, OFDM, LTEAbstract
Long Term Evolution (LTE) is an evolving wireless communication standard that requires high data rate, higher bandwidth efficiency and better coverage. So, spectrally efficient techniques like Orthogonal Frequency Division Multiplexing (OFDM), Multiple Input Multiple Output and Error Control Codes with high coding gain are constituents of LTE. OFDM partitions a channel with wide bandwidth into several channels with narrow bandwidth that are flat, in order to mitigate the effects of multipath fading and Inter Symbol Interference (ISI). Error control codes enhance reliable transmission over noisy fading channels. The objective of this work is to increase data rate and reduce bit error rate by combining OFDM and Turbo Codes. Bit error rate is further reduced by applying Cyclic Redundancy Check (CRC) and Flip and Check algorithm (FC) along with turbo codes. In this paper, MAP and MAX Log MAP algorithms have been applied in the turbo decoding process and their performance compared. The proposed algorithm has been implemented and simulated using MATLAB.
References
A. C. Reid, T. A. Gulliver, D. P. Taylor, "Convergence and Errors in Turbo-decoding", IEEE Transactions on Communications, Vol.49, Issue 12, pp. 2045-2051, 2001.
S C. Berrou, A. Glavieux, P. Thitimajshima, “Near Shannon Limit Error - Correcting Coding and Decoding : Turbo-codes 1”, Proceedings of the IEEE International Conference on Communication, Geneva, pp.1064 – 1070, 1993.
L. A. Perişoară, R. Stoian ,“The Decision Reliability of MAP, Log-MAP, Max-Log-MAP and SOVA Algorithms for Turbo Codes”, International Journal of Communications, Vol. 2, Issue 1, pp. 65-74, 2008.
B. Sklar, “Digital Communications : Fundamentals and Applications”, Prentice Hall, USA, pp. 475 – 510, 2001.
F. Daneshgaran, M. Laddomada, and M. Mondin. "Interleaver design for serially concatenated convolutional codes: theory and application." IEEE Transactions on Information Theory, Vol. 50, Issue 6, pp. 1177-1188, 2004.
F. Daneshgaran, M. Laddomada, "Reduced complexity interleaver growth algorithm for turbo codes ", IEEE Transactions on Wireless Communications, Vol. 4, Issue 3, pp. 954-964, 2005.
J. Yu, M-L. Boucheret, R. Vallet, A. Duverdier, G. Mesnager, "Interleaver Design for Turbo Codes from Convergence Analysis", IEEE Transactions on Communications, Vol. 54, Issue 4, pp. 619-624, 2006.
C. F. Leanderson, C-E.W Sundberg, "On List Sequence Turbo Decoding", IEEE Transactions on Communications, Vo. 53, Issue 5, pp. 760-763, 2005.
K. R. Narayanan, G. L. Stuber. "List Decoding of Turbo Codes", IEEE Transactions on Communications, Vol. 46, Issue 6, pp.754-762, 1998.
T.Tonnellier, C.Leroux, B. Le Gal, B. Gadat, C. Jego, N. V. Wambeke, “Lowering the Error Floor of Turbo Codes With CRC Verification”, IEEE Wireless Communications Letters, Vol. 5, Issue 4, pp. 404 – 407, 2016.
Y. Wu, W. Y. Zou, “Orthogonal frequency division multiplexing : a multi-carrier modulation scheme”, IEEE Transactions on Consumer Electronics, Vol. 41, Issue 3, pp. 392 – 399, 1995.
P. Vyas, N. Parihar, V. Gupta, R. Jain, "A Comparison Study for PSD Performance in OFDM Systems Based on Using Autocorrelation Techniques", International Journal of Scientific Research in Computer Science and Engineering, Vol.1, Issue.2, pp.10-14, 2013.
R. Saxena, N. Gupta, N. Praveen, “Use of turbo coding in OFDM system for improving BER; A Review”, International Journal of Engineering and Innovative Technology, Vol. 2, Issue 7, pp. 81 – 84, 2013.
D. G. Agrawal, R. K. Paliwal, P. Subramaniam, “Effect of Turbo Coding on OFDM Transmission to Improve BER,” International Journal of Computer Technology and Electronics Engineering, Vol. 2, Issue 1, pp. 94 – 102, 2012.
R. Singh, “4G By WiMAX2 and LTE-Advance”, International Journal of Computer Sciences and Engineering, Vol. 1, Issue 3, pp. 36-38, 2013.
S. M. Chadchan, C. B. Akki. "3GPP LTE/SAE: An Overview." International Journal of Computer and Electrical Engineering, Vol. 2, Issue 5, pp. 806 – 814, 2010.
C. Anghel, V. Stanciu, C. Paleologu, “CTC Turbo Decoding Architecture for LTE Systems Implemented on FPGA,” Proceedings of the Eleventh International Conference on Networks (ICN 2012), Reunion Island, pp. 199 – 204, 2012.
P. Robertson, E. Villebrun, P. Hoeher, “A Comparison of Optimal and Sub-optimal MAP Decoding Algorithms Operating in the Log Domain”, IEEE International Conference on Communications, USA, pp. 1009-1013, 1995.
J. F. Cheng, H. Koorapaty. "Error detection reliability of LTE CRC coding", Proceedings of the IEEE Vehicular Technology Conference (Fall), Canada, pp. 1 – 5, 2008.
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