Improvement in Data Transmission Efficiency in Mobile 5G New Radio System using Filter Bank Multicarrier Signals

This paper explores the potential advantages of using FBMC signals instead of OFDM signals in 5G NR. Several approaches to the generation and reception of FBMC signals such as based on frequency spreading and using poly-phase structure are considered. Moreover, a new computationally efficient scheme of FBMC signal generation is proposed. Bit error ratio (BER) curves in standard EPA, EVA, and ETU channels with Doppler frequencies of 5, 70, and 300 Hz, respectively, are obtained. A comparison of the computational complexity of the various approaches for processing FBMC signals together and concerning the case of OFDM signals is performed. It is shown that the method of implementing FBMC/OQAM signals with frequency spreading provides a gain in spectrum efficiency and energy cost, but suffers the computational complexity of up to approximately 12 times compared with a method of implementing CP-OFDM signals. The proposed approach to the formation of FBMC signals can reduce the loss in computational efficiency from 3 to 4 times, while the values of the gain in spectral efficiency remain unchanged.