A Novel Double Tree Complex Wavelet Transform OFDM Based on Fast Walsh Hadamard Transform

Karaerik, Kudret; Tuna, Elif Busra; Tek, Yusuf Islam; Sinop, Hayriye; Yasar, Sabiha; Avcı, Büşra; Aykiri, Gazihan; Özen, Ali

doi:10.1109/icecce49384.2020.9179184

2020 International Conference on Electrical, Communication, and Computer Engineering (ICECCE) 2020

DOI: 10.1109/icecce49384.2020.9179184

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A Novel Double Tree Complex Wavelet Transform OFDM Based on Fast Walsh Hadamard Transform

Kudret Karaerik

Elif Busra Tuna

Yusuf Islam Tek

et al.

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2021

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“…The authors in [36] made a comparative study on the suitability of a Walsh-Hadamard transformed (WHT) universal-filtered multicarrier (UFMC) system with classical OFDM and UFMC systems in terms of BER and SNR performance. The authors in [37] established improved performance of a double-tree complex wavelet transform (DTCWT)-based OFDM system in combination with the fast WHT (FWHT) and eliminated the drawbacks of the OFDM system. In [38], authors recommended a zero tail inverse lifting wavelet transform spread FWHT OFDM (ZT-ILWTs FWHT OFDM) system as an alternative to the conventional OFDM and presented better performance of their proposed system in terms of BER, PAPR, and OOB emission.…”

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Analytical Framework of CP-Free Multiuser OFDM System for Coordinated Multi-Point at mmWave

et al. 2021

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In this paper, a coordinated multipoint joint transmission (CoMP-JT) framework at mmWave for a cyclic prefix (CP)-free multiuser OFDM wireless communication system is developed and analyzed. The aim is to provide high-quality service to cell-edge users; otherwise, the cell-users would suffer from significant signal degradation due to undesired interference. The impact of complex Hadamard transform with block diagonalization channel precoding for multiuser interference reduction and designed subcarrier mapping for out-of-band (OOB) reduction are investigated. In addition, the paper studied the input back-off-aided high-power amplifier for peak-to-average power ratio (PAPR) reduction and forward error correction channel coding for improved bit error rate (BER) for cell-edge users at mmWave frequencies. Moreover, signal-to-interference-noise ratio and ergodic achievable rate are estimated both in the presence and absence of CoMP-JT-based transmission technique to verify their significance in terms of transmitted power. Numerical investigations showed an OOB reduction of 312 dB, PAPR reduction from 17.50 dB to 7.66 dB, and improved BER of 1×10−3 in 16-QAM for a signal-to-noise ratio of −6 dB. Hence, the simulation results demonstrated the effectiveness of the developed system.

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Analytical Framework of CP-Free Multiuser OFDM System for Coordinated Multi-Point at mmWave

et al. 2021

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A Novel Double Tree Complex Wavelet Transform OFDM Based on Fast Walsh Hadamard Transform

Cited by 1 publication

References 8 publications

Analytical Framework of CP-Free Multiuser OFDM System for Coordinated Multi-Point at mmWave

Analytical Framework of CP-Free Multiuser OFDM System for Coordinated Multi-Point at mmWave

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