MA-OFDM-SPM: A NEW MULTIPLE ACCESS TECHNIQUE FOR 3GPP-DEFINED REDCAP IOT DEVICES

Year 2025, Volume: 13 Issue: 1, 1 - 10, 01.03.2025

Ülkü Güleç , Jehad M. Hamamreh , Seyfettin Sinan Gültekin

https://doi.org/10.36306/konjes.1530104

Abstract

RedCap devices face challenges related to efficient multiple access techniques that can fully leverage their potential while adhering to their constraints. There are many multiple access techniques proposed in the literature recently, but none of them is deemed a good fit for the multi-facet requirements of RedCap devices. Motivated by that, this paper introduces a new multiple-access technique designed to address these challenges, aiming to optimize the performance and efficiency of RedCap devices in various application scenarios. The proposed technique seeks to enhance data rates, reduce latency, and extend battery life while maintaining the cost-effectiveness and simplicity essential for RedCap devices. Consequently, the proposed design effectively overcomes prior challenges and boosts system throughput by leveraging the power domain to transmit supplementary data bits, all while preserving a streamlined and uncomplicated transceiver design. In summary, with the same time, frequency, space, and power resources, it can be served an additional user with a stream of data bits equal to that of the main user, thus resulting in doubling the system’s spectral efficiency.

Keywords

6G, Coherent Transmission, IOT, Non-Coherent OFDM, Subcarrier Power Modulation, Wireless Communications

References

• S. N. K. Veedu et al., “Toward smaller and lower-cost 5G devices with longer battery life: An overview of 3GPP Release 17 RedCap,” IEEE Commun. Stand. Mag., vol. 6, no. 3, Sep., pp. 84–90, 2022.
• L. Dai, B. Wang, Z. Ding, Z. Wang, S. Chen, and L. Hanzo, “A survey of non-orthogonal multiple access for 5G,” IEEE Commun. Surv. Tutor., vol. 20, no. 3, pp. 2294–2323, 3rd Quart., 2018.
• J. M. Hamamreh, M. Abewa, and J. P. Lemayian, “New non-orthogonal transmission schemes for achieving highly efficient, reliable, and secure multi-user communications,” RS Open J. Innov. Commun. Technol., vol. 1, no. 2, 2020.
• C. Xu et al., “Sixty years of coherent versus non-coherent tradeoffs and the road from 5G to wireless futures,” IEEE Access, vol. 7, pp. 178246–178299, 2019.
• A. Hajar, J. M. Hamamreh, M. Abewa, and Y. Belallou, “A spectrally efficient OFDM-based modulation scheme for future wireless systems,” in 2019 Scientific Meeting on Electrical-Electronics Biomedical Engineering and Computer Science (EBBT), Apr. 2019, pp. 1–4.
• J. M. Hamamreh, A. Hajar, and M. Abewa, “Orthogonal frequency division multiplexing with subcarrier power modulation for doubling the spectral efficiency of 6G and beyond networks,” Trans. Emerg. Telecommun. Technol., vol. 31, p. e3921, 2020.
• A. Hajar and J. M. Hamamreh, “The generalization of orthogonal frequency division multiplexing with subcarrier power modulation to quadrature signal constellations,” RS Open J. Innov. Commun. Technol., vol. 1, no. 1. [Online]. Available: https://doi.org/10.21428/03d8ffbd.4948e89e. [Accessed May 24, 2024].
• M. Abewa and J. M. Hamamreh, “Non-coherent OFDM-subcarrier power modulation for low complexity and high throughput IoT applications,” RS Open J. Innov. Commun. Technol., vol. 1, no. 1, 2020. [Online]. Available: https://doi.org/10.46470/03d8ffbd.2a45a9a1. [Accessed May 30, 2024].
• A. Jaradat, J. Hamamreh, and H. Arslan, “Modulation options for OFDM-based waveforms: Classification, comparison, and future directions,” IEEE Access, vol. 7, pp. 17263–17278, 2019.
• A. Goldsmith, Wireless Communications. Cambridge, U.K.: Cambridge Univ. Press, 2005.
• M. Abewa and J. M. Hamamreh, “NC-OFDM-SPM: A two-dimensional non-coherent modulation scheme for achieving the coherent performance of OFDM along with sending an additional datastream,” RS Open J. Innov. Commun. Technol., vol. 2, no. 3, 2021. [Online]. Available: https://doi.org/10.46470/03d8ffbd.a97a5236. [Accessed June 13, 2024].
• M. Hijazi and J. M. Hamamreh, “Signal space diversity for improving the reliability performance of OFDM with subcarrier power modulation,” RS Open J. Innov. Commun. Technol., vol. 2, no. 3, 2021. [Online]. Available: https://doi.org/10.46470/03d8ffbd.7f32914f. [Accessed June 27, 2024].
• M. Hijazi and J. M. Hamamreh, “Signal space diversity for improving the reliability performance of OFDM with subcarrier power modulation,” RS Open J. Innov. Commun. Technol., vol. 2, no. 3, 2021. [Online]. Available: https://doi.org/10.46470/03d8ffbd.7f32914f. [Accessed June 30, 2024].
• A. Abuqamar, J. M. Hamamreh, and M. Abewa, “STBC-assisted OFDM with subcarrier power modulation,” RS Open J. Innov. Commun. Technol., vol. 2, no. 4, 2021. [Online]. Available: https://doi.org/10.46470/03d8ffbd.275ae770. [Accessed July 01, 2024].
• M. Hijazi and J. M. Hamamreh, “Convolutional neural network-based equalizer for improving the reliability performance of OFDM with subcarrier power modulation,” RS Open J. Innov. Commun. Technol., vol. 2, no. 5, 2021. [Online]. Available: https://doi.org/10.46470/03d8ffbd.48b1d1c8. [Accessed July 01, 2024].
• A. Abuqamar and J. M. Hamamreh, “Back propagation artificial neural network for improving the performance of STBC-based OFDM with subcarrier power modulation,” RS Open J. Innov. Commun. Technol., vol. 2, no. 4, 2021. [Online]. Available: https://doi.org/10.46470/03d8ffbd.7aff4a62. [Accessed July 01, 2024].