Diversity Technique Using Discrete Wavelet Transform in OFDM System
Nagma Parveen1, Khaizuran Abdullah2, Rafiqul Islam3, Rounakul Islam Boby4
1Nagma Parveen, Department of Electrical and Computer Engineering, International Islamic University, Kuala Lumpur Malaysia.
2Khaizuran Abdullah, Department of Electrical and Computer Engineering, International Islamic University, Kuala Lumpur Malaysia.
3Rafiqul Islam, Department of Electrical and Computer Engineering, International Islamic University, Kuala Lumpur Malaysia.
4Rounakul Islam Boby, Department of Electrical and Computer Engineering, International Islamic University, Kuala Lumpur Malaysia.
Manuscript received on 22 April 2019 | Revised Manuscript received on 01 May 2019 | Manuscript Published on 05 May 2019 | PP: 284-287 | Volume-8 Issue-2S2, May 2019 | Retrieval Number: B10590182S219/19©BEIESP
Open Access | Editorial and Publishing Policies | Cite | Mendeley | Indexing and Abstracting
© The Authors. Blue Eyes Intelligence Engineering and Sciences Publication (BEIESP). This is an open access article under the CC-BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/)
Abstract: Spectrum usage due to an increasing number of mobile users using services like audio, video, and images is one of the challengings for wireless communication. Orthogonal Frequency Division Multiplexing (OFDM) is one of the promising techniques to increase spectral efficiency. However, the conventional OFDM using fast fourier transform (FFT) still has the drawback of reducing spectral efficiency. Discrete wavelet transforms (DWT) has been used as an alternative method replacing FFT to increase the spectral efficiency. This paper presents the fundamental of wavelets and their significance in wireless communication. A review of the literature has been done on how the DWT-OFDM performs better when compared to FFT-OFDM and on diversity technique such as transmit and receive diversity. The advantages of using diversity at both receiver and transmitter, i.e., Multiple inputs and multiple output systems and the overview of the technique is also considered. The flexibility, improve in the performance of BER, mitigate the interference DWT-OFDM with diversity at both transmitter and receiver provides emerging technology for future generation.
Keywords: OFDM, DWT, FFT, BER.
Scope of the Article: Aggregation, Integration, and Transformation