A ZCMT Precoding Based Multicarrier OFDM System to Minimize the High PAPR

Baig, İmran; Jeoti, Varun

doi:10.1007/s11277-012-0501-1

Cited by 23 publications

(2 citation statements)

References 21 publications

(14 reference statements)

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“…Also, out of all the members of the wavelet family, the Haar transform performed the best-regarding BER improvement for a given value of SNR [22]. It has been observed that precoding techniques [23][24][25][26][27][28][29], as well as the use of transform other than FFT , improve the BER and PAPR reduction performance for OFDM/WiMAX/MIMO/OFDM-MIMO system.…”

Section: Related Workmentioning

confidence: 99%

Performance Analysis of WOFDM‐WiMAX Integrating Diverse Wavelets for 5G Applications

Kansal

Gaba

Sharma

et al. 2021

Wireless Communications and Mobile Computing

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In the 5th generation (5G) and 6th generation (6G) of wireless mobile telecommunication networks, the requests for an elevated data rate with access to stationary as well as portable customers are going to be overwhelming. Mobile worldwide interoperability for microwave access (WiMAX) comes out as a favourable alternative that is intelligibly developed and more matured than wireless fidelity (Wi-Fi). Mobile WiMAX makes use of the orthogonal frequency division multiple access (OFDMA) technology for its two-way communication to enhance the system performance in fading environments making it more suitable for 5G applications. The diverse OFDM forms deliberated here are the fast Fourier transform- (FFT-) based WiMAX and discrete wavelet transform- (DWT-) based WiMAX. The suggested study exhibits the bit error rate (BER) and peak to average power ratio (PAPR) reduction by integrating different wavelet families, i.e., Haar, symlet, coiflet, and reverse biorthogonal over Rayleigh fading channel. The simulation results obtained by MATLAB depicts an improvement in PAPR reduction, and signal to noise ratio (SNR) requirement is also reduced by 6-12 dB by using DWT-incorporated WiMAX at a BER of 10-4.

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Section: Related Workmentioning

confidence: 99%

Performance Analysis of WOFDM‐WiMAX Integrating Diverse Wavelets for 5G Applications

Kansal

Gaba

Sharma

et al. 2021

Wireless Communications and Mobile Computing

View full text Add to dashboard Cite

show abstract

“…The DFT precoding in SC‐FDMA results in low PAPR with improved BER performance because of the frequency diversity gain through spreading. Other precoding techniques or matrices are also studied for the PAPR reduction in OFDM systems, ie, WH transform in the work of Park et al, ZC sequences in the work of Baig and Jeoti, DCT in the work of Baig, DST in the work of Baig et al, DHT in the work of Baig, and CI codes in the work of Yang and Wang . In Section 3 of our work, precoding techniques are compared on the basis of PAPR performances with pulse shaping and some useful insights about roll‐off factor, the number of taps required to implement transmit filter, excess bandwidth required, efficiency, and implementation cost of transmit filter.…”

Section: Introductionmentioning

confidence: 99%

Trigonometric transforms and precoding strategies for OFDM‐based uplink hybrid multi‐carrier nonorthogonal multiple access

Trivedi

Ramadan

Kumar

et al. 2019

Trans Emerging Tel Tech

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An uplink hybrid nonorthogonal multiple access (h-NOMA) scheme utilizing power domain multiplexing is adopted in this paper for orthogonal frequencydivision multiplexing (OFDM)-based systems. The OFDM-based NOMA systems can achieve high spectral efficiency with resilience to wireless multipath fading. The h-NOMA maintains a low interference level per resource block or low complexity of multiuser detection (MUD) implementation at the receiver and also achieves consistent fairness performance by restricting the maximum number of users per resource block. An improved user clustering algorithm for OFDM-based h-NOMA system under the assumption of user's distinct data rate requirement is presented here. The proposed algorithm takes into consideration both the channel gain of all activated users and the different data rate requirements of weak channel gain users. High peak-to-average power ratio (PAPR) and performance degradation due to strict frequency synchronization requirements are the main drawbacks of such an OFDM-based uplink h-NOMA system. High PAPR of multicarrier NOMA is addressed here with precoding techniques. An enhanced minimum mean square error (MMSE) receiver performing joint equalization and carrier frequency offset (CFO) compensation using low-complexity banded-matrix implementation is proposed to cancel interference in the frequency domain. The MUD is implemented with low-complexity successive interference cancellation (SIC) using bandedmatrix approximation of the interference matrix in the presence of CFO. Moreover, the possibility of utilizing efficient trigonometric transforms to implement OFDM-based NOMA is studied with CFO and estimation errors. For OFDM-based h-NOMA system, an efficient combination of different trigonometric transform configurations to constitute the multicarrier basis for OFDM with a suitable precoding strategy for PAPR reduction is studied.Trans Emerging Tel Tech. 2019;30:e3694.wileyonlinelibrary.com/journal/ett

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Hybrid Zadoff‐Chu and multilateral piecewise exponential companding transform–based PAPR reduction technique in OFDM systems

Manjula

Muralidhara

2019

Int J Communication

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SummaryThe orthogonal frequency‐division multiplexing (OFDM) is a multicarrier modulation system that is used to transmit the large volume of data to the receiver. Reducing the peak‐to‐average power ratio (PAPR) in OFDM system is one of the demanding and crucial task in recent days. For this reason, various precoding and companding mechanisms are developed in the traditional works, but it remains with the limitations of increased complexity, reduced performance, and nonlinear distortion. The reduction of PAPR is achieved by minimizing the companding distortion with the enhancement of the bit error rate (BER) performance significantly. Then, in order to avoid clipping in OFDM, a multilateral piecewise exponential companding transform (MPECT) method has been utilized rather than using piecewise exponential companding transform (PEC) where PAPR is getting reduced. The OFDM is very sensitive to synchronizing error. To overcome this sensitivity, employ the Zadoff‐Chu sequence to carrier frequency offsets. Zadoff‐Chu matrix transform (ZCMT) has numerous merits among the other ODFM systems such as the improvement in the performance of the channels that are fading away and provides an ideal periodic autocorrelation and a constant magnitude periodic cross correlation. Both of these techniques provide improvement in the ODFM systems. To get more efficiency, this paper aims to develop a hybrid technique by integrating the ZCMT and MPECT techniques for reducing the PAPR in OFDM systems. Further, convolutional encoding is applied for better BER and PAPR. The simulation results of the proposed ZCMT‐MPECT technique are evaluated and compared with the conventional OFDM and other precoding methods.

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A ZCMT Precoding Based Multicarrier OFDM System to Minimize the High PAPR

Cited by 23 publications

References 21 publications

Performance Analysis of WOFDM‐WiMAX Integrating Diverse Wavelets for 5G Applications

Performance Analysis of WOFDM‐WiMAX Integrating Diverse Wavelets for 5G Applications

Trigonometric transforms and precoding strategies for OFDM‐based uplink hybrid multi‐carrier nonorthogonal multiple access

Hybrid Zadoff‐Chu and multilateral piecewise exponential companding transform–based PAPR reduction technique in OFDM systems

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