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Paper Details

Paper Title
DATA TRANSMISSION THROUGH OFDM SYSTEM BY USING DISCRETE WAVELET TRANSFORM TECHNIQUES
Abstract
The efficient use of data transmission is main problem in advanced type communication systems. Many technologies are used for higher data rates, in this process the OFDM system plays main role compared to the technologies. The OFDM system is one type of multicarrier modulation technique, in this system the original signal can be divided into many number sub carriers. The same process is also done in other type of modulation techniques, but in OFDM system orthogonality condition is existed between the subcarriers. In OFDM system two types of interferences will be there, they are Inter Carrier Interference (ICI) and Inter Symbol Interference (ISI) and these are occurred due to the orthogonality loss between the subcarriers, to overcome this problem cyclic prefix (CP) is used. CP is a guard band in OFDM system that uses 20% of required subcarrier. Wavelet based OFDM system provides better orthogonality between subcarriers. Signal to Noise Ratio (SNR) of the message signal improved by the wavelet transform techniques. Wavelet based OFDM system does not require cyclic prefix, so bandwidth cannot be wasted. Compare the obtained results of 16QAM, 64QAM and 256 QAM with conventional DFT method. This is the one advantage to improve the utilization of the spectrum. OFDM system based on wavelet transform is proposed in the place of Discrete Fourier Transform (DFT) based OFDM in LTE. Comparing performance of Bit Error Rate (BER) in wavelet transform based techniques with DFT based OFDM.
KeyWord
OFDM, FFT, DWT Families [Haar, DB, Biorthogonal], BER, SNR,LTE.
Others Details
Paper Id : 42790
Author Name : P SUDHEER
Co-Author Name(s) : K APARNA
Volume/Issue No : Volume 04 Issue 10
Page No : 135-142
DOI Number : DOI:10.21090/IJAERD.42790
Publication Date : 2017-10-13
License : This work is licensed under a Creative Commons Attribution 4.0 International License.
website : http://www.ijaerd.com/index.php
Impact Factor : 4.72, SJIF-2016
ISSN Details : eISSN: 2348-4470, pISSN:2348-6406