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Investigations on Performance of DWT based OFDM system for different modulating schemes with varying constellation levels

N. Hariprasad*, Alamelu Nachiappan**

* Research Scholar, Sathyabama University, Chennai, India.

** Professor, Department of EEE, Pondicherry Engineering College, Pondicherry, India,

Periodicity:April - June'2013
DOI : https://doi.org/10.26634/jwcn.2.1.2307

Abstract

OFDM (Orthogonal Frequency Division Multiplexing) is one of the major multicarrier systems used in present day wireless communications. The capability to meet out the demand for very high data rate with in the restricted bandwidth makes it more popular. The evolving technology improves the OFDM by replacing the conventional FFT based system with DWT-OFDM. This emerging trend is currently in the laboratory level. This paper discusses about the selection of suitable modulation scheme for DWT OFDM, after simulating the different possible M-ary methods with various constellation levels. Rayleigh fading channel environment for simulation was created using MATLAB program and the results infer that the QAM is the most suited procedure for DWT based OFDM.

Keywords

OFDM, FFT, DWT, M-PSK, M-QAM

How to Cite this Article?

Hariprasad, N., and Nachiappan, A. (2013). Investigations on Performance of DWT Based OFDM System for Different Modulating Schemes With Varying Constellation Levels, i-manager’s Journal on Wireless Communication Networks. 2(1), 18-22. https://doi.org/10.26634/jwcn.2.1.2307

References

[1]. Khaizuran Abdullah and Zahir M. Ussain, (2009). “Studies on DWT-OFDM and FFT-OFDM Systems” International Conference Muscat Feb 15-19 ,2009 (ICCCP'09) PP 383-386

[2]. R. Asif., R.A. Abd-Alhameed., O.Anoh (2012). "Performance Evaluation of DWT-FDM and FFT-OFDM for Multicarrier Communications Systems using Time Domain Zero Forcing Equalization" International Journal of Computer Applications (0975 – 8887)Volume 51– No.4, August 2012

[3]. N. Hariprasad and Dr. Alamelu Nachiappan, (2013). ”Comparative analysis of FFT OFDM and DWT OFDM, and their performance combined with MIMO systems over Rayleigh fading channel” Proceedings of National conference on Microwave antennas and remote sensing, June 7-8, 2013,pp 107-110

[4]. Louis Litwin and Michael Pugel, (2001). "The principles of OFDM"in RF Signal processing section of www.rfdesign.compp 30-48 Jan 2001.

[5].The wavelet tutorial by RobiPolikar, http://users.rowan.edu/~polikar/WAVELETS/WTpart1.html

[7]. AyoobAlateeq., Mohammad Matin, (2013). "Study of the BER performance in RoF-OFDM system modulated by QAM and PSK" IOSR Journal of Engineering (IOSRJEN)Vol. 3, Issue 3 (Mar. 2013),PP 27-32

[8]. RuchinMangla and ManinderSingh, "Performance Comparison of MIMO-OFDM Transceiver Wireless Communication System using QAM and QPSK Modulation Schemes"ISSN: 2319 – 1120 /IJAEST/V1N2: 66-72 ©IJAEST

[9]. Mrs. Veena M.B and Dr. M.N. Shanmukha Swamy, (2011). "Performance analysis of DWT based OFDM over FFT based OFDM and implementing on FPGA" International Journal of VLSI design & Communication Systems (VLSICS) Vol.2, No.3, September 2011 pp119-130.

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