Performance Analysis of DWT Based OFDM-IM System in α − κ −µ Fading Environment

Alok Joshi; Rachna Singh; Gunjan Gupta

doi:10.2478/ijssis-2026-0025

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Performance Analysis of DWT Based OFDM-IM System in α − κ −µ Fading Environment

International Journal on Smart Sensing and Intelligent Systems

Volume 19 (2026): Issue 1 (January 2026)

By: Alok Joshi, Rachna Singh and Gunjan Gupta

Open Access

|May 2026

Abstract

Orthogonal frequency division multiplexing (OFDM) is the most sought choice when it comes to high speed applications owing to its superlative performance in fading environment. However spectral efficiency of OFDM can be further enhanced by using OFDM with index modulation (OFDM-IM) where index of the active subcarrier is also used to carry the payload along with constellation vector. Similar to its predecessor, the OFDM-IM system also suffers from high peak-to-average power ratio. This paper uses discrete wavelet transform (DWT) based OFDM-IM system where the inverse fast Fourier transform (IFFT) block is replaced with DWT block and results show better performance of DWT based systems over IFFT based systems in terms of Peak-to-Average Power Ratio (PAPR) reduction. Besides this we also evaluate the performance of system over α – κ – µ fading channel. α – κ – µ is one of the most sophisticated fading channels which fits very closely to practical data statistics.

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Articles in this issue

DOI: https://doi.org/10.2478/ijssis-2026-0025 | Journal eISSN: 1178-5608

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Language: English

Submitted on: May 19, 2025

Published on: May 26, 2026

Published by: Macquarie University, Australia

In partnership with: Paradigm Publishing Services

Publication frequency: 1 issue per year

Keywords:

OFDM,

DWT,

OFDM-IM,

PAPR,

α – κ – µ

Related subjects:

Engineering,

Introductions and overviews,

Engineering, other

© 2026 Alok Joshi, Rachna Singh, Gunjan Gupta, published by Macquarie University, Australia
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License.

Volume 19 (2026): Issue 1 (January 2026)