Abstract
The challenge associated with cognitive radio systems based on orthogonal frequency division multiplexing (OFDM) lies in sidelobes caused by the OFDM subcarriers. As a result, reducing these sidelobes originating from the transmitter becomes crucial. Several methods are suggested in the literature to suppress these sidelobes, but the prerequisites for better superior techniques are still demanding. The earlier methods comprise the use of cancellation carriers to overcome these sidelobes. However, the cancellation carrier scheme leads to incompetent spectrum utilization because of the insertion of extra subcarriers to minimize interference. This paper proposes the employment of multiple generalized sidelobe cancellers (GSCs) in serial concatenation. The outputs of one GSC are fed into the following GSCs to produce enhanced sidelobe suppression. The effectiveness of the suggested approach is evaluated through simulations in comparison with various established techniques. Simulation results demonstrate improved sidelobe reduction performance for the proposed scheme compared with existing methods.
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Acknowledgements
We would like to express our sincere gratitude to the Ministry of Science and ICT (MSIT) and the National Research Foundation (NRF) of South Korea for their invaluable support and funding that made this research possible.
Funding
This work was supported in part by the National Research Foundation of Korea (NRF) funded by the Korea government (MSIT) (No. 2021R1A2C1013150 and 2022R1F1A1074556).
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AK, NG, and AE contributed to the conceptualization and data curation of the study and methodology. SMK, SUH, and JK formally analyzed project administration and provided resources. Similarly, AK, NG, JK, SMK, SUH, and AE contributed to the manuscript’s original draft and review process.
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Kaleem, A., Gul, N., Elahi, A. et al. Multiple Generalized Sidelobe Cancellers for Minimization of Interference in Cognitive Radio System. Wireless Pers Commun 133, 641–666 (2023). https://doi.org/10.1007/s11277-023-10784-8
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DOI: https://doi.org/10.1007/s11277-023-10784-8