UFMC Transceiver Complexity Reduction

International audienceUFMC is a candidate waveform technology for 5G wireless systems and beyond. It combines the simplicity of OFDM with the advantages of FBMC. However, these advantages come together with an increase in the complexity at the transmitter caused by the implementation of a filter and applying an FFT for each sub-band, whereas at the receiver it is due doubling the size of the FFT being implemented. Then a low-complexity solutions must be found. UFMC waveform and FFT pruning have been widely studied recently but separately. In this paper, the computational complexity of different UFMC implementation methods with FFT pruning is evaluated. Depending on the number of sub-bands, it is shown that a complexity reduction up to 50% of the UFMC transmitter can be obtained. Also, the UFMC receiver complexity can be reduced to be similar or even less than OFDM. This complexity reduction of the UFMC transceiver comes without performance degradation since no computational approximation is introduced