BER Analysis of Convolutional Encoded DWT-OFDM and coded FFT-OFDM under Different Simulation Conditions

Simmi Garg, Anuj Kumar Sharma, Anand Kumar Tyagi


In this study, we investigated the performance of Convolutional encoded Discrete Wavelet Transform based orthogonal frequency division multiplexing (DWT-OFDM) system over additive white Gaussian noise (AWGN) channel. QAM and PSK modulation have been used for simulations. Performance of Convolutional encoded DWT-OFDM is compared with uncoded DWT-OFDM system and encoded conventional OFDM system. Bit error rate (BER) is used as measuring parameter. Simulations have been done using MATLAB software. It has been found in simulations that Convolutional encoded DWT-OFDM outperforms uncoded DWT-OFDM as well as coded conventional OFDM system. Performance of Convolutional encoded DWT-OFDM system has been studied using different modulation schemes namely 16-QAM, 32-QAM, 64-QAM, 16-PSK and 32-PSK. It is found that BER of encoded DWT-OFDM system improves as we decrease the constellation number and performance of coded DWT-OFDM is better with QAM modulation than with PSK modulation. Different wavelets namely Haar, Dabuchiees, biorthogonal, Symlet are used for simulating the system. Further, impact of different members of same wavelet family is studied over the performance of encoded DWT-OFDM.


Keywords: OFDM, DWT, FEC, FFT, BER

Cite this Article

Simmi Garg, Anuj Kumar Sharma, Anand Kumar Tyagi. BER Analysis of Convolutional Encoded DWT-OFDM and coded FFT-OFDM under Different Simulation Conditions. Research & Reviews: Journal of Physics. 2019; 8(1): 7–16p.



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Weinstein S, Ebert P. Data transmission by frequency division multiplexing using the discrete Fourier transform. IEEE transsactions on communications. 1971; 19: 628-634.

Chang R and Gibby R. Theoretical study of performance of an orthogonal multiplexing data transmission scheme. IEEE transaction on Communications. 16:529-540.

Soman K, Resmi N, Ramachandran K. Inside into Wavelet- from theory to practice: Prentice Hall; 2004.

Hamming R. Error detecting and error correcting code. The bell system technical journal.1950; 29(2):147-160. DOI: 10.1002/j.1538-7305.1950.tb00463.x

Lin S, Costello D and Miller M. Automatic repeat request error control schemes. IEEE Communication magazine. 1984; 22(12): 5-17.

Yamamoto H and Itoh K. Viterbi decoding algorithm for Convolutional codes with repeat requests. IEEE Transaction Information theory. 1980; 26: 540-547.

Mizuochi. T Recent progress in forward error correction and its interplay with transmission impairments. IEEE journal on selected topics in quantum electronics. 2006; 12(4). DOI: 10.1109/JSTQE.2006.876597

Gupta M and Tiwari S. Performance evaluation of conventional and wavelet based OFDM system. International Journal of Electronics and Communications. 2013; 67: 348-354.

Sharma V and Singh G. BER assessment of conventional OFDM and wavelet based OFDM over AWGN channel. Optic. 2014; 125: 6071-6073.

Kaur H, Kumar M, Sharma A and Singh H. Performance analysis of DWT based OFDM over fading environment for mobile Wi-max. Optik .2016; 127: 544-547.

Chen T. Analysis of forward error correcting codes. Proceedings of IEEE International conference on Design and manufacturing informatization; 2011, p. 329-332.

Pollet T, Bladel M and Moeneclaey M. BER sensitivity of OFDM systems to carrier frequency offset and Wiener phase noise. IEEE Transactions Communication. 1995; 43: 191-193.

Zhang H, Yuan D, Jiang M and Wu D. Research of DFT-OFDM and DWT-OFDM on different transmission scenarios. Proceedings of IEEE ICITA; 2004.

China H, Fazel K and Papke L. On the performance of convolutionally-coded CDMA/OFDM for mobile communication system. Proceedings of IEEE PIMRC; 1993; Yokohama, Japan: p. 468–472.

Lakshmanan M and Nikkokar H. A review of wavelets for digital wireless communication. Journal on wireless personal communication, 2006; 37:387-420.

Kumbusar V and Kucur O. Performance comparison of wavelet based and conventional OFDM system in multipath Rayleigh fading channels. Digital signal processing. 2012; 22: 841-846.

Haque1 M, Ullah S, and Ahmed M. Performance evaluation of a wireless Orthogonal Frequency Division Multiplexing system under various concatenated FEC channel-coding schemes. Proceedings of the 11th International conference on Computer and Information Technology; 2008 Khulna, Bangladesh.

Rashed M, Kabir M, Reza M, Islam M, Shams R, Saleh M, Ullah S. Transmission of Voice Signal: BER Performance Analysis of Different FEC Schemes Based OFDM System over Various Channel. International Journal of Advanced Science and Technology. 2011; 3.

Gupta M and Sharma V. To improve bit error rate of turbo coded OFDM transmission over noisy channel. Journal of Theoretical and Applied Information Technology. 8: 162- 168.

Dwivedi V, Gupta A, Kumar R and Singh G. Performance Analysis of coded OFDM system using various coding scheme. In: Progress in Electromagnetics Research symposium proceedings, Moscow, Russia, 2009, p. 1249-1253.


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