Comparison of Prototype Filters for FBMC-OQAM Systems

Al-Dulaimi, Mohammed Abdulzahra and Cseppentő, Bence and Kollár, Zsolt (2025) Comparison of Prototype Filters for FBMC-OQAM Systems. In: Proceedings of the IEEE 35th International Conference Radioelektronika. Proceedings of International Conference Radioelektronika . Institute of Electrical and Electronics Engineers (IEEE), Piscataway (NJ), No.-11008414. ISBN 9798331544478; 9798331544485

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Abstract

Filter Bank MultiCarrier (FBMC) modulation, especially when combined with Offset Quadratic Amplitude Modulation (OQAM), is a promising technology for wireless communication and a strong candidate to replace Orthogonal Frequency Division Multiplexing (OFDM). FBMC-OQAM systems achieve high spectral efficiency and reduced out-of-band emissions due to the use of well-designed prototype filters. This paper discusses the criteria for selecting prototype filters in FBMC systems. It comprehensively evaluates various prototype filters, including PHYDYAS, IOTA, and Hermite filters. The analysis focuses on key performance metrics such as power spectral density, ambiguity function, and time-frequency localization. The results highlight each filter's unique strengths and weaknesses based on these metrics.

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