Proceedings ArticleDOI
Performance Analysis of DFT-OFDM, DCT-OFDM, and DWT-OFDM Systems in AWGN Channel
D. Gupta,Vipin B. Vats,Kamal K. Garg +2 more
- pp 214-216
TLDR
Simulation results show that Haar wavelet based scheme yields the lowest average bit error probability and the performance of DFT-OFDM and DWT (Haar)-OFDM with QPSK is better than BPSK modulation format.Abstract:
In this paper, the bit error rate (BER) performance of conventional discrete Fourier transform (DFT) - OFDM system is compared with discrete wavelet transform (DWT)-OFDM system and discrete cosine transform (DCT)-OFDM system in an AWGN environment. Several wavelets such as Haar, Daubechie and Symlet are considered. We give the performance with two modulation format such as BPSK and QPSK. Simulation results show that Haar wavelet based scheme yields the lowest average bit error probability and the performance of DFT-OFDM and DWT (Haar)-OFDM with QPSK is better than BPSK modulation format.read more
Citations
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Journal ArticleDOI
Design of a novel hybrid intercarrier interference mitigation technique through wavelet implication in an OFDM system
TL;DR: This paper proposes an approach that devises a new hybrid technique, which is a combination of Maximum Likelihood Estimation (MLE) and Self Cancellation (SC) techniques through wavelet implication, to enhance BER performance of the OFDM system.
Journal ArticleDOI
Performance comparison of wavelet based and conventional OFDM systems in multipath Rayleigh fading channels
Volkan Kumbasar,Oguz Kucur +1 more
TL;DR: Wavelet based wavelet based OFDM has better bit error rate (BER) performance than conventional OFDM without cyclic prefix (CP) for all signal-to-noise ratios (SNRs) and also outperforms OFDM with CP for low SNR values in indoor and outdoor environments.
Journal ArticleDOI
Performance analysis of DWT based OFDM over FFT based OFDM and implementing on FPGA
Veena,Shanmukha Swamy +1 more
TL;DR: A DWT-IDWT based OFDM transmitter and receiver that achieve better performance in terms SNR and BER for AWGN channel is proposed and proves all the wavelet families better over the IFFT-FFT implementation.
Journal ArticleDOI
Performance comparison of wavelet packet transform (WPT) and FFT-OFDM system based on QAM modulation parameters in fading channels
TL;DR: A study of wavelet packet transform modulation WPT- OFDM scheme is conducted, and the performance comparison is made against the traditional FFT-OFDM over various fading channels.
Journal ArticleDOI
Efficient Transmission of Encrypted Images with OFDM in the Presence of Carrier Frequency Offset
Ibrahim M. Eldokany,El-Sayed M. El-Rabaie,S. M. Elhalafawy,Mohamed A. Zein Eldin,Mai H. Shahieen,Naglaa F. Soliman,Mohsen A. M. El-Bendary,Mohammed Abd El-Naby,Faisal S. Al-kamali,Ibrahim F. Elashry,Fathi E. Abd El-Samie +10 more
TL;DR: A comparison between four encryption algorithms with images transmitted through different OFDM versions is presented to select the most appropriate version of OFDM, and the most suitable image encryption algorithm for efficient image transmission.
References
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Book
Ten lectures on wavelets
TL;DR: This paper presents a meta-analyses of the wavelet transforms of Coxeter’s inequality and its applications to multiresolutional analysis and orthonormal bases.
Journal ArticleDOI
Ten Lectures on Wavelets
TL;DR: In this article, the regularity of compactly supported wavelets and symmetry of wavelet bases are discussed. But the authors focus on the orthonormal bases of wavelets, rather than the continuous wavelet transform.
Journal ArticleDOI
Orthonormal bases of compactly supported wavelets
TL;DR: This work construct orthonormal bases of compactly supported wavelets, with arbitrarily high regularity, by reviewing the concept of multiresolution analysis as well as several algorithms in vision decomposition and reconstruction.
Journal ArticleDOI
Data Transmission by Frequency-Division Multiplexing Using the Discrete Fourier Transform
Stephen B. Weinstein,P. Ebert +1 more
TL;DR: The Fourier transform data communication system is described and the effects of linear channel distortion are investigated and a differential phase modulation scheme is presented that obviates any equalization.
Journal ArticleDOI
A novel IQ imbalance compensation scheme for the reception of OFDM signals
TL;DR: A novel digital compensation scheme for orthogonal frequency division multiplex (OFDM) receivers based on adaptive frequency domain filtering to remove the IQ imbalance effects.
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