BER Analysis of Translation Invariant Wavelet Based Orthogonal Frequency Division Multiplexing System for 5G Wireless Communication Networks

Abstract

A good orthogonality is provided by the wavelet-based orthogonality frequency division multiplexing (W-OFDM) and well reduction of bit error rate is gained with W-OFDM over conventional OFDM systems. Most importantly, it provides enhanced spectral efficiency since it does not require cyclic prefix (CP) which leads to the achievement of ultra-high data rates. Hence, this can be used in 5 th generation (5G) wireless communication networks. It is proposed to use the discrete wavelet transform (DWT) based OFDM in place of conventional discrete fourier transform (DFT) based OFDM in the applications of long term evaluation (LTE). However, discrete wavelet transforms (DWT) based OFDM system suffers from the down sampling, which mitigates the actual size of input bit streams and there by degradation in the system efficiency. To resolve this issue, and for enhancing further mitigation in bit error rate (BER) performance, a novel W-OFDM is proposed. Our proposed W-OFDM system utilizes translation invariant wavelet transform (TIWT) in place of DWT for enhanced spectral efficiency. In addition, fading channel environment is considered to disclose the effectiveness of proposed TIWT-OFDM system. Extensive experimental results show that the BER performance of proposed TIWT-OFDM is superior to the existing OFDM systems like DFT-OFDM and DWT-OFDM systems.

Performance analysis of OFDM with variations in cyclic prefix and FFT lengths

“…These weaknesses lead to inadvertent mistakes in the communication system, which worsen the system and raise BER values. An MCM method is offered as a workaround for this issue, in which the input serial data stream is sent at a low data rate as a few parallel streams [7]. In contrast to time dispersion of multipath propagation, which results in ISI, the Doppler Shift's frequency dispersion (ICI), which increases bandwidth effectiveness and lowers ISI and ICI [3], causes the ISI.…”

Simulation of Asymmetric digital subscriber line (ADSL) using the Discrete Wavelet Multitone Modulation (DWMT)

“…The high-speed W-OFDM can be used in high-speed wireless data transmission such as LTE, 5G etc. The author (Sunkara & Bhargava, 2018) proposed the W-OFDM where the translation-invariant Wavelet transform (TIWT) was used in place of the DWT to enhance the spectral efficiency and found the TIWT-OFDM is superior to the existing OFDM systems like DFT-OFDM and DWT-OFDM systems. The authors (Alshammary, 2016) investigated the influence of Wavelet and Fast Fourier Transform (FFT) on WLAN IEEE.802.11.a system with Orthogonal Frequency Division Multiplexing where the OFDM is used to simulate the proposed system's performance using BPSK, DPSK, QPSK, DQPSDK, QAM16, and QAM64 modulation algorithms.…”