Open Access Open Access  Restricted Access Subscription or Fee Access

On the Employment of Unpunctured Turbo-Trellis Coded Modulation Channel Coding to Improve the Performance of WiMax System

Mohamed Reda Lahcene(1), Abdesselam Bassou(2*), Mohammed Beladgham(3), Abdelmalik Taleb-Ahmed(4)

(1) LTIT Laboratory, University of Tahri Mohamed, Algeria
(2) LTIT Laboratory, University of Tahri Mohamed, Algeria
(3) LTIT Laboratory, University of Tahri Mohamed, Algeria
(4) LAMIH Laboratory UMR CNRS 8530, University of Valenciennes, France
(*) Corresponding author



The wireless communications evolved considerably in the last few years. This fact encouraged the deployment of several systems or cellular networks in multi technological environment. Worldwide Interoperability for Microwave Access (WiMax) is an emerging standard for next generation wireless communication system with high data rate and broacoverage. In this paper, we present the simulation of a digital communication system based on the specifications of IEEE 802.16d standard (WiMax) in order to evaluate the performance of this system. WiMax standard allows a good transmission, considering relatively high SNRs using RS-CC channel encoder. Considering the UTTCM encoder with iterative decoding, the aim is to decrease the SNR (reduce the transmission power) and thus improve the performance of the transmission system. This work focuses on the performance comparison of the standard WiMax system and WiMax system using UTTCM as channel coding. The simulation results have shown that, with lower decoding complexity, the UTTCM-based WiMax system achieved better performance.
Copyright © 2018 Praise Worthy Prize - All rights reserved.


WiMax; UTTCM; Gray Mapping; Ungerboeck-Gray Mapping; RS-CC; Channel Decoder Complexity

Full Text:



Ning Chen, Zhiyuan Yan, Complexity Analysis of Reed-Solomon Decoding over GF(2^m) without Using Syndromes, EURASIP Journal on Wireless Communications and Networking, Volume 2008, Article ID 843634, pages 1–11.

J. Bellorado, A. Kavcic, Low Complexity Decoding Algorithms for Reed Solomon Codes—Part I: An Algebraic Soft-in-Hard-out Chase Decoder, IEEE Trans. on Infor. Theory, Volume 56, (Issue 3), March 2010, pages 945–959.

J. Bellorado, A. Kavcic, M. Marrow, L Ping, Low-Complexity Soft-Decoding Algorithms for Reed–Solomon Codes-Part II: Soft-Input Soft-Output Iterative Decoding, IEEE Trans. on Infor. Theory, Volume 56,(Issue 3), March 2010, pages 960–967.

D. Matolak, S. Wilson, Variable-Complexity Trellis Decoding of Binary Convolutional Codes, IEEE Trans. on Commun., Volume 44, (Issue 2), February1996, pages 121–126.

I. Chatzigeorgiou, A. Demosthenous, M. R. D. Rodrigues, I. J. Wassell, On the Performance-Complexity Tradeoff of Convolutional Codes for Broadband FWA Systems, IET Communications, volume 4,(Issue 4), March 2010, pages 419–427.

J. D. Kenea, K. D. Kulat, Soft Output Decoding Algorithm for Turbo Codes Implementation in Mobile Wi-Max Environment, 2nd International Conference on Communication, Computing & Security, Procedia Technology, Vol. 6, pp. 666–673, October 2012.

C. Berrou, A. Glavieux and P. Thitimajshima, Near Shannon limit error-correcting coding and decoding: Turbo Codes, IEEE Int. Conf. Commun., pp. 1064–1070, Geneva, Switzerland, May 1993.

A. Bassou, A. Djebbari, M. Benaissa, Design of unpunctured turbo trellis-coded modulation, AEÜ International Journal of Electronics and Communications, Volume 67, (Issue 3), March 2013, pages 223–232.

G. Ungerboeck, Channel coding with multilevel/phase signaling, IEEE Trans. Inform. Theory, Volume 25, (Issue 1), January 1982, pages 55–67.

P. Robertson, T. Wörz, Coded modulation scheme employing turbo codes, Electronics Letters, vo-lume 31, (Issue 2), August 1995, pages 1546–1547.

P. Robertson, T. Woerz, Bandwidth-efficient turbo trellis coded modulation using punctured com-ponent codes, IEEE J. on Selected Areas in Commun., Volume 16, (Issue 2), February 1998, pages 206–218.

D. Divsalar, F.Pollara, On the Design of Turbo Codes, JPL TDA Progress Report 42-123, November 1995, pages 99–121.

S. Benedetto, D. Divsalar, G. Montorsi, F. Pollara, Bandwidth efficient parallel concatenated coding schemes, Electronics Letters, volume 31, (Issue 24), November 1995, pages 2067–2069.

S. Benedetto, D. Divsalar, G. Montorsi, F. Pollara, Parallel concatenated trellis codes modulation, International Conference on Communications, pp. 974–978, Dallas, USA, June 1996.

C. Fragouli, R. D. Wesel, Turbo-encoder design for symbol interleaved parallel concatenated trellis-coded modulation, IEEE Trans. on Commun., Volume 49, (Issue 3), March 2001, Pages 425–435.

IEEE Std 802.16-2004, IEEE Standard for Local and Metropolitan Area Networks Part 16: Air Inter-face for Fixed Broadband Wireless Access Systems,

J. G. Andrews, A. Ghosh, R. Muhamed, Fundamentals of WiMAX–Understanding Broadband Wireless Networking (Pearson Education, 2007).

C. Wang, D. Sklar, D. Johnson, Forward Error-Correction Coding, Crosslink, The Aerospace Corporation magazine of advances in aerospace technology, Volume 3, (Issue 1), December 2001, Pages 26–29.

J. G. Proakis, Digital Communications (McGraw Hill Higher Education, Volume 4,2000).

S. B. Wicker, Error control systems for digital communication and storage (Prentice-Hall, 1995).

M. A. Mohamed, F. W. Zaki, R. H. Mosbeh, Simulation of WiMaX Physical Layer: IEEE 802.16e, In-ternational Journal of Computer Science and Network Security, Volume10, (Issue 11), November 2010, pages 44–55.

A. J. Viterbi, Error Bounds for Convolutional Codes and an Asymptotically Optimum Decoding Algorithm, IEEE Trans. Infor. Theory, Volume13, (Issue 2), April 1967, pages 260–269.

IEEE Std 802.11a, IEEE Standards Board (Piscatawa, 1999).

J. D. Kene, K. D. Kulat, Performance Evaluation of IEEE 802.16e WiMax Physical Layer, IEEE 2nd In-ternational Conference on Current Trends in Technology, Ahmedabad, India, December 2011.

V. Erceg, K. V. S. Hari, M. Smith, D. S. Baum, Channel models for fixed wireless applications, Contribution to IEEE 802.16.3, July 2001, pages 1–35.

L. Xiao, L. Cuthbert, Improving fairness in relay-based access networks, ACM 11th international symposium on Modeling, analysis and simulation of wireless and mobile systems, pp. 18–22, New York, USA, October 2008.

S. Dolinar, D. Divsalar, Weight distributions for turbo codes using random and nonrandom permu-tations, JPL TDA Progress Report 42-122, August 1995, pages 56–65.

E. Dunscombe, F. C. Piper, Optimal Interleaving Scheme for Convolutional Codes, Electronics Let-ters, Volume 25, (Issue 22), October 1989, pages 1517–1518.

S. N. Crozier, New high-spread high-distance interleavers for turbo codes, Biennial Symposium of Communications, pp. 3–7, Kingston, Canada, May 2000.

Lakshmananan, M., Mallick, P., Nithyanandan, L., Saikrishna, M., Efficient Carrier Frequency Offset Estimation Method in Uplink OFDMA for Mobile WiMax, (2015) International Journal on Communications Antenna and Propagation (IRECAP), 5 (3), pp. 132-137.

Pyla, S., Padma Raju, K., Balasubrahmanyam, N., Performance Analysis of OFDM System Using Pi-lots, Coding Bounds and MAP Decoder for Next Generation Applications, (2017) International Journal on Communications Antenna and Propagation (IRECAP), 7 (5), pp. 364-369.

Subrahmanyeswara Rao, T., Aswini, T., Venu Gopal Rao, M., Implementation of Low-Power Adap-tive Viterbi Decoder for Wireless Communication, (2015) International Journal on Communications Antenna and Propagation (IRECAP), 5 (6), pp. 316-322.


  • There are currently no refbacks.

Please send any question about this web site to
Copyright © 2005-2022 Praise Worthy Prize