Numerical Simulation and Design of Improved Filter Bank Multiple Carrier System as Potential Waveform for 5G Communication System

Single-carrier frequency division multiple access is paired with filter bank multi-carrier (FBMC) offset quadrature amplitude modulation (SC-FDMA). To improve upon the classic FBMC precoding scheme, we use a trimmed discrete fourier transform (DFT) in conjunction with one-tap scaling. SC-FDMA requires a cyclic prefix, but the proposed technique has the same peak-to-average power ratio and produces substantially less out-of-band radiation. Complex orthogonal restoration and FBMC ramp-up/ramp-down times are greatly decreased, making it possible for low-latency transmissions to be achieved. Our approach has only twice the computational complexity of pure SC-FDMA. Our assertions are backed up by simulations on channels with two levels of selection and a free MATLAB code. Note that a modified SC-FDMA transmission method can be viewed as a DFT-spread FBMC that has been trimmed. Traditional FBMC systems have more requirements for the filter, while the prototype filter has less of them. Software such as MATLAB is used throughout the entire endeavour. The proposed approach drastically reduced the PAPR of the FBMC technique by 25%.