Abstract

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.

Highlights

  • WiMAX organizations designed WiMAX system to have unanimity and consistency of the IEEE 802.16 guidelines, as of called a wireless metropolitan area network (MAN)

  • An appropriate selection of the modulation techniques/level is the trade-off between bit error rate (BER) and spectral efficiency, i.e., as we keep on increasing the level of modulation from QPSK to 16-PSK and so on the BER performance keeps on decreasing, the increase in the modulation level results in an enhancement in the spectral effectiveness of the module

  • We have proposed an adaptive system which will select any of the optimum wavelets that will give us best peak to average power ratio (PAPR) and BER reduction

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Summary

Introduction

WiMAX organizations designed WiMAX system to have unanimity and consistency of the IEEE 802.16 guidelines, as of called a wireless metropolitan area network (MAN). An appropriate selection of the modulation techniques/level is the trade-off between BER and spectral efficiency, i.e., as we keep on increasing the level of modulation from QPSK to 16-PSK and so on the BER performance keeps on decreasing, the increase in the modulation level results in an enhancement in the spectral effectiveness of the module In addition to this elevated PAPR is a key shortcoming of the modern-day multicarrier transmission systems, i.e., 4G and 5G. Many researchers have proposed a replacement of FFT by DWT in modern-day wireless telecommunication systems (4G, 5G) due to its inferior time-frequency localization, poor bandwidth efficiency due to utilization of cyclic prefix, poor BER performance, etc. The entire manuscript is structured as follows: Section 1 explains the reasons for using wavelet transforms in the existing wireless communication systems by citing the issues related to WiMAX.

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