基于多相网络的低复杂度UFMC发射机

Universal Filtered Multi-Carrier (UFMC), which is an emerging 5G waveform candidate, has gained wide attention in recent years. The properties of UFMC is very close to OFDM, while the former has better spectrum properties than the latter. UFMC is more suitable for short-burst communication systems than other 5G waveform candidates, for example, Filter-Bank Multi-Carrier (FBMC). However, the complexity of conventional UFMC transmitter is much higher than OFDM. To solve this problem, this paper firstly present a low complexity transmitter structure based on the combination of small-size IFFT and time-domain interpolation. On the basis of this, a new Polyphase Network (PPN) based UFMC transmitter with much lower computational complexity is proposed. Our PPN based approach eventually brings the complexity of UFMC transmitter down to the same level as OFDM, and makes the complexity of UFMC transmitter even lower than OFDM in some special conditions. This PPN based low complexity implementation makes UFMC more suitable for the devices with low computing power.