Simulation of FBMC Systems over AWGN Channel

This paper presents the simulation of FBMC (Filter Bank Multi-Carrier) systems under AWGN (Additive White Gaussian Noise) channel conditions. FBMC is a multicarrier modulation technique widely applied in wireless communications due to its superior spectral efficiency and robustness against multipath interference. The implementation typically involves MATLAB or Python scripts that model the complete transmission chain, including prototype filter design using PHYDYAS or IOTA filters, polyphase network implementation for efficient synthesis/analysis, and OQAM (Offset Quadrature Amplitude Modulation) preprocessing to maintain orthogonality without cyclic prefix. The simulation framework covers channel modeling with AWGN addition using randn() functions for noise generation, modulation/demodulation techniques employing IFFT/FFT operations with additional filter banks, and BER (Bit Error Rate) performance analysis through Monte Carlo simulations. Key algorithmic components include the calculation of signal-to-noise ratios, error counting mechanisms, and constellation diagram visualization for performance validation. These simulations provide valuable insights into FBMC's behavior under AWGN conditions, offering practical references for real-world communication system design by comparing performance metrics like BER versus Eb/N0 curves with theoretical expectations.