Comparative Evaluation of Spectral Efficiency in Multicarrier Modulation Techniques

Abstract

Recent advancements in 5G technology emphasize the need for enhanced spectral efficiency to achieve higher data rates. In current mobile communication systems, cyclic-prefix-based Orthogonal Frequency Division Multiplexing (CP-OFDM) is predominantly used. However, in 4G technology, the cyclic prefix presents a significant drawback, as it leads to symbol rate duplication, thereby reducing efficiency.

To address these limitations, 5G has adopted the Filter Bank Multi-Carrier (FBMC) modulation technique. This method utilizes a specially designed prototype filter to enhance data rates. Unlike OFDM, FBMC effectively suppresses side lobes, resulting in improved spectral efficiency. Consequently, FBMC offers a promising solution for next-generation mobile communication systems.