Open Access Open Access  Restricted Access Subscription or Fee Access

Turbo Coding Scheme based on Serially Concatenated Rate 3/4, 16 State Convolutional Codes for Fading Channel

Rajkumar Goswami, G. Sasi Bhushana Rao


The corruption of the transmission signal in the channel has always been a cause of worry for communication engineers, especially in the multipath environment where it necessitates the additional processing in order to mitigate the errors those creep in because of the fading effect created due to this multipath phenomenon. Various Forward Error Correction (FEC) Schemes have evolved over a period of time such as Block Codes, Convolutional codes, TCM Codes and in the recent past Turbo Coding Schemes have become more popular due to its high performance. In this paper the use of turbo coding scheme based on Serially Concatenated Convolutional Codes (SCCC) has been presented for achieving the better BER in respect of fading channel. A design of convolutionalencoder of rate 3/4, 16 states has been presented which forms the integral part of the Turbo Coder. The performance analysis of this turbo coding scheme has been undertaken in respect of fading environment. The complete analysis has been undertaken in MATLAB. The fading channel has been simulated through Rician Multipath Model and the performance of the proposed Turbo Coding Scheme has been compared with the performance of the Convolutional coding Scheme for the same convolutional encoder and with the uncoded 8PSK. The performance of the same has also been evaluated in the case of AWGN channel.


Convolutional Code, Fading Channel, TCM, Turbo Codes

Full Text:



G. Ungerboeck, “Channel coding with multilevel phase signaling”, IEEE Trans. Inf. Th., vol.IT-25, Jan. 1982, pp.55-67.

C. Berrou, A. Glavieux, and P. Thitimajshima, “Near Shannon limit error-correcting coding and decoding: Turbo-codes”, Proc. Int. Conf.Communications, Geneva, Switzerland, May 1993, pp. 1064–1070.

L. Hanzo, T. H. Liew, B. L. Yeap. Turbo Coding, Turbo Equalisation and Space-Time Coding for Transmission over Fading Channels, Wiley-IEEE Press May 2003.

S. Benedetto, D. Divsalar, G. Montorsi, and F. Pollara, “Serial concatenation of interleaved codes: Performance analysis, design and iterative decoding”, IEEE Trans. Inform. Theory, vol. 44, May 1998, pp.909–926,

Raffi Achiba and Mehrnaz Mortazavi, “Turbo Codes Performance and Design Trade Offs”, MILCOM 2000, PP 174-180

Keattisak, Sripimanwat, Turbo code Applications, Springer 2005.

Jamali Hamidreza S. and Tho Le Ngoc, Coded Modulation Techniques for Fading Channels, Boston: Kluwer Academic Publishers, 1994.

L. Hanzo, T.H. Liew, B.L. Yeap Turbo Coding, Turbo Equalisation and Space-Time Coding, John Wiley & Sons, Ltd. 2002

Rui Xue, Dan-Feng, Zhao Jie Zhang, “An Improved Method for the Convergence of Iterative Detection in SCCC System” Wireless Communications, Networking and Mobile Computing, 2008. 12-14 Oct.2008 pp1-5

S. Benedetto, D. Divsalar, G. Montorsi and F. Pollara, “A Soft-Input Soft-Output APP Module for Iterative Decoding of Concatenated Codes”, IEEE communications letters, VOL. 1, NO. 1, January 1997 pp 22 – 24

G. D. Forney, Concatenated Codes, MIT Press, Cambridge, MA, 1966.

J. Du and B. Vucetic, “New M-PSK Trellis Codes for fading channels,”Electronics Letters, Vol. 26, No.16, pp. 1267-1269, Aug. 1990.

Rajkumar Goswami, SasiBhusana Rao, Rajan Babu, Ravindra Babu, “8 State Rate 2/3 TCM Code Design for Fading Channel” IEEE conference On Control, Communications and Automation, Dec 2008,Vol-II, pp.323 -326.

Dariush Divsalar and Marvin K. Simon, "The Design of Trellis Coded MPSK for Fading Channels: Set Partitioning for Optimum Code Design," IEEE Trans. on Communications, Sept. 1988, Vol. 36, No. 9,pp. 1013-1021,

Juihong Yuan, B Vucetic and Wen Feng, “Turbo-Coded M-QAM for fading channel”, Electronic Letters, 31 Aug 2000, Vol. 36 No 18, pp 1562 – 1503

Manjeet Singh, Ian Wassell, “Comparison between Serial and Parallel Concatenated Channel Coding Schemes using Continuous Phase Modulation over AWGN and Fading Channels”, CIC 2001, Las Vegas, June 2001.


  • There are currently no refbacks.

Creative Commons License
This work is licensed under a Creative Commons Attribution 3.0 License.