FBMC Filter Bank Multicarrier System Simulation Program with OQAM Modulation

The simulation program for FBMC (Filter Bank Multicarrier) system implements Offset Quadrature Amplitude Modulation (OQAM) for multicarrier transmission. While FBMC shares several similarities with OFDM systems, it presents distinct technical differences in implementation. The FBMC system employs filter bank structures for multicarrier signal transmission, whereas OFDM relies on Discrete Fourier Transform (DFT) operations. In code implementation, FBMC typically uses prototype filter design (like PHYDYAS filters) and polyphase network structures for efficient computation. Key advantages of FBMC include superior handling of frequency-selective fading channels through better frequency localization, achieved via carefully designed filter banks in the implementation. The system provides enhanced spectral efficiency and improved interference resistance compared to OFDM, which is particularly evident in asynchronous access scenarios. From an implementation perspective, FBMC demonstrates reduced time-domain fluctuations and greater frequency-domain flexibility, allowing adaptation to diverse wireless communication environments through adjustable filter parameters and modulation schemes. The simulation code typically includes modules for: OQAM preprocessing with real-valued symbol mapping, synthesis filter bank at the transmitter, analysis filter bank at the receiver, and channel equalization components. These features position FBMC as a promising technology for future communication systems, especially in 5G/6G scenarios requiring high spectral efficiency and robustness.