Performance Analysis of DWT Based OFDM-IM System in α − κ −µ Fading Environment.
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| Title: | Performance Analysis of DWT Based OFDM-IM System in α − κ −µ Fading Environment. |
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| Authors: | Joshi, Alok1 (AUTHOR), Singh, Rachna1 (AUTHOR), Gupta, Gunjan2 (AUTHOR) gunjan.gupta12@yahoo.com |
| Source: | International Journal on Smart Sensing & Intelligent Systems. May2026, Vol. 19 Issue 1, p1-9. 9p. |
| Subjects: | Discrete wavelet transforms, Orthogonal frequency division multiplexing, Bit rate, Wireless communications performance, Multi-carrier modulation, Radio transmitter fading |
| 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. [ABSTRACT FROM AUTHOR] |
| Copyright of International Journal on Smart Sensing & Intelligent Systems is the property of Paradigm Publishing Services and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.) | |
| Database: | Engineering Source |
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| 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. [ABSTRACT FROM AUTHOR] |
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| ISSN: | 11785608 |
| DOI: | 10.2478/ijssis-2026-0025 |
