A Comparative Performance Analyses of FFT Based OFDM and DWT Based OFDM Systems

Engin Oksuz; Ahmet Altun; Busra Ulgerli; Gokay Yucel; Ali Ozen

EN

A Comparative Performance Analyses of FFT Based OFDM and DWT Based OFDM Systems

Abstract

While continuously increasing demand for high data rates, to develop more efficient wireless communication systems will always be needed. Orthogonal Frequency Division Multiplexing (OFDM) is a promising multi-carrier wireless communication system for high-speed data transmission with spectral efficiency and fading immunity. Conventional OFDM systems use Fourier filters with the help of the inverse Fast Fourier Transform (IFFT) and Fast Fourier Transform (FFT) for modulation and demodulation in transmitter and receiver, respectively. On the other hand, wavelet based OFDM system uses orthonormal wavelets which are derived from a multistage tree-structured wavelet family. Discrete wavelet transform (DWT), reducing inter symbol interference (ISI) and inter carrier interference (ICI), can be used due to better orthogonality and more bandwidth efficiency for OFDM systems. In this paper, performance of the OFDM system based on low complexity DWT (DWT-OFDM) has been compared with FFT based OFDM (FFT-OFDM) system. In DWT based OFDM system, the IFFT and FFT blocks in conventional FFT based OFDM system are simply replaced by an IDWT and DWT, respectively. Computer simulations have been performed to verify the effectiveness of both methods and compare the performance of the DWT-OFDM and FFT-OFDM system in additive white Gaussian noise (AWGN) channel and AWGN plus frequency flat Rayleigh fading channels for different modulation types. The obtained simulation results using HIPERLAN/2 standard have demonstrated that the DWT-OFDM system has considerably better performance than the conventional FFT-OFDM system in all modulation types and also provides high SNR improvement of approximately 6 dB for a BER value of 1E-3.

Keywords

FFT-OFDM,DWT-OFDM,ISI,ICI,bandwidth efficiency.

References

B. Soysal, High Performance Receiver Design for OFDM Based Wireless Communications Systems, Ph.D. Thesis, Graduate School of Natural and Applied Science, Karadeniz Technical University, Trabzon, Turkey, October 2004.
M. H. M Nerma, N. S. Kamel and V. Jeoti, An OFDM System Based on Dual Tree Complex Wavelet Transform (DT-CWT), Signal Processing: An International Journal (SPIJ), Vol. 3, No. 2, pp. 14-26, 2009.
M. K. Lakshmanan and H. Nikookar, A Review of Wavelets for Digital Wireless Communication, Springer Journal on Wireless Personal Communication, Vol. 37, No. 3-4, pp. 387-420, May 2006.
A. Jamin and P. Mahonen, Wavelet Packet Modulation for Wireless Communications, Wiley Wireless Communications and networking, Journal, Vol. 5, No. 2, pp. 123-137, March 2005.
V. Kumbasar and O. Kucur, Performance Comparison of Wavelet Based and Conventional OFDM Systems in Multipath Rayleigh Fading Channels, Digital Signal Processing, Vol.22, pp. 841–846, 2012.
R. Mirghani and M. Ghavami, Comparison Between Wavelet-Based and Fourier-Based Multicarrier UWB Systems, IET Communications, Vol. 2, Issue 2, pp. 353-358, 2008.
A. H. Kattoush, W. A. Mahmoud and S. Nihad, The Performance of Multiwavelets Based OFDM System Under Different Channel Conditions”, Digital Signal Processing, Vol. 20, pp. 472–482, 2010.
A. Lindsay, Wavelet Packet Modulation for Orthogonally Transmultiplexed Communications, IEEE Transactions on Signal Processing, Vol. 45, pp. 1336-1339, May 1997.
M. J. Manglani, Wavelet Modulation in Gaussian and Rayleigh Fading Channels, MSc. Thesis, Faculty of the Virginia Polytechnic Institute and State University, July 2001.
H. Zhang, D. Yuan, M. Jiang and D. Wu, Research of DFT-OFDM and DWT-OFDM on Different Transmission Scenarios, Proceedings of the 2nd International Technology for Application (ICITA 2004).

A. Akansu, P. Duhamel, X. Lin and M. Courville, Orthogonal Transmultiplexers in Communication: A Review, IEEE Transactions on Signal Processing, Vol. 46, Issue 4, pp. 979–995, 1998.
D. Hailemariam, Wavelet Based Multicarrier Code Division Multiple Access Communication for Wireless Environment, MSc. Thesis, Addis Ababa University, 2003.
B. G. Negash and H. Nikookar, Wavelet Based OFDM for Wireless Channels, International Research Center for Telecommunication Transmission and Radar.
A. Jamin and P. Mahonen, Wavelet Packet Modulation for Wireless Communications, Published in Wireless Communication & Mobile Computing Journal, Vol. 5 Issue 2, March 2005.
K. Abdullah, Interference Mitigation Techniques for Wireless OFDM, Ph.D. Thesis, School of Electrical and Computer Engineering Science, Engineering and Technology Portfolio RMIT University, August 2009.
Y. Shiferaw, Comparative Performance Study on Wavelet Based Orthogonal Frequency Division Multiplexing (OFDM) Using Different Wavelets, MSc. Thesis, Addis Ababa University, March 2007.
E. Öksüz, A Comparative Performance Analysis of FFT Based and DWT Based Systems for OFDM Systems, Electronic Design and Aplication Thesis, Nuh Naci Yazgan University, Department of Electrical and Electronics Engineering, Kayseri, Turkey, January – 2016.
E. Öksüz, A. Altun, B. Ülgerli, G. Yücel and A. Özen, A Comparative Performance Analysis of FFT Based OFDM and DWT Based OFDM Systems, Electrical-Electronics and Computer Symposium, EEB2016, pp. 201-205, Gaziosmanpaşa University, Tokat, Turkey, 11-13 May, 2016.
S. Qureshi, Adaptive Equalization, Proceedings of the IEEE, Vol. 73, No. 9, pp. 1349–1387, 1985.
C. A. Belfiore and J. H. Park, Decision Feedback Equalization, Proceedings of the IEEE, Vol. 67, No. 8, pp. 1143–1156, 1979.
R. T. Boyd and F. C. Monds, Equalizer for Digital Communication, IEE Electronic Letters, Vol. 7, No. 2, 1971.
S. Haykin, Communication Systems, 3rd Edition, Wiley, New York, 1994.
J. G. Proakis, Digital Communications, 4th Edition, Mc Graw Hill International Editions, 2001.
A. Özen, B. Soysal, İ. Kaya, A. R. Nix, A Fuzzy- Based Outer Loop Controller for LMS Algorithm and its Application to Channel Estimation and Carrier Tracking for OFDM, MoMuC 2003 8th International Workshop on Mobile Multimedia Communications, pp. 79-86, 5-8 October 2003, Munich, GERMANY.
N. Akansu and M. J. Medley, Wavelet and Subband Transforms: Fundamentals and Communication Application, IEEE Transactions on Communications Magazine, pp. 104-115, December 1997.
M. J. Manglani, Wavelet Modulation in Gaussian and Rayleigh Fading Channels, MSc. Thesis, Faculty of the Virginia Polytechnic Institute and State University, July 2001.
I. Daubechies, Ten Lectures on Wavelets, SIAM: Society for Industrial and Applied Mathematics, 1992.
C. S. Burrus, R. A. Gopinath, and H. Guo, Introduction to Wavelets and Wavelet Transforms: A primer, Prentice Hall, 1998.
M. W. Frazier, An Introduction to Wavelets Through Linear Algebra, Springer-Verlag, New York, 1999.
M. A. Tzannes, M. C. Tzannes, J. Proakis, and P. N. Heller, DMT Systems, DWMT Systems and Digital Filter Banks, in Proceedings ZCC, 1994.
IEEE Std. 802.11a –1999 Supplement to IEEE Standard for Information Technology-High-Speed Physical Layer in the 5 GHz Band.
ETSI Broadband Radio Access Networks; HIPERLAN/2 Technical Spec.: Physical Layer.

Details

Primary Language

English

Subjects

-

Journal Section

-

Authors

Engin Oksuz This is me

Ahmet Altun This is me

Busra Ulgerli This is me

Gokay Yucel This is me

Ali Ozen This is me

Publication Date

November 25, 2016

Submission Date

November 25, 2016

Acceptance Date

-

Published in Issue

Year 2016 Volume: 5

IZ

https://izlik.org/JA47XX85ZW

APA

Oksuz, E., Altun, A., Ulgerli, B., Yucel, G., & Ozen, A. (2016). A Comparative Performance Analyses of FFT Based OFDM and DWT Based OFDM Systems. Journal of New Results in Science, 5, 272-287. https://izlik.org/JA47XX85ZW

AMA

1.Oksuz E, Altun A, Ulgerli B, Yucel G, Ozen A. A Comparative Performance Analyses of FFT Based OFDM and DWT Based OFDM Systems. JNRS. 2016;5:272-287. https://izlik.org/JA47XX85ZW

Chicago

Oksuz, Engin, Ahmet Altun, Busra Ulgerli, Gokay Yucel, and Ali Ozen. 2016. “A Comparative Performance Analyses of FFT Based OFDM and DWT Based OFDM Systems”. Journal of New Results in Science 5 (November): 272-87. https://izlik.org/JA47XX85ZW.

EndNote

Oksuz E, Altun A, Ulgerli B, Yucel G, Ozen A (November 1, 2016) A Comparative Performance Analyses of FFT Based OFDM and DWT Based OFDM Systems. Journal of New Results in Science 5 272–287.

IEEE

[1]E. Oksuz, A. Altun, B. Ulgerli, G. Yucel, and A. Ozen, “A Comparative Performance Analyses of FFT Based OFDM and DWT Based OFDM Systems”, JNRS, vol. 5, pp. 272–287, Nov. 2016, [Online]. Available: https://izlik.org/JA47XX85ZW

ISNAD

Oksuz, Engin - Altun, Ahmet - Ulgerli, Busra - Yucel, Gokay - Ozen, Ali. “A Comparative Performance Analyses of FFT Based OFDM and DWT Based OFDM Systems”. Journal of New Results in Science 5 (November 1, 2016): 272-287. https://izlik.org/JA47XX85ZW.

JAMA

1.Oksuz E, Altun A, Ulgerli B, Yucel G, Ozen A. A Comparative Performance Analyses of FFT Based OFDM and DWT Based OFDM Systems. JNRS. 2016;5:272–287.

MLA

Oksuz, Engin, et al. “A Comparative Performance Analyses of FFT Based OFDM and DWT Based OFDM Systems”. Journal of New Results in Science, vol. 5, Nov. 2016, pp. 272-87, https://izlik.org/JA47XX85ZW.

Vancouver

1.Engin Oksuz, Ahmet Altun, Busra Ulgerli, Gokay Yucel, Ali Ozen. A Comparative Performance Analyses of FFT Based OFDM and DWT Based OFDM Systems. JNRS [Internet]. 2016 Nov. 1;5:272-87. Available from: https://izlik.org/JA47XX85ZW