Enhancing OFDM by Pulse Shaping for Self-Contained TDD Transmission in 5G

For time division duplex systems with increased bandwidth in 5G, the concept of self-contained transmission has been proposed. Aiming at reduced latency and more flexible resource allocation, this concept involves frequent uplink and downlink switching and relatively short transmission in both directions. In this work, we consider single OFDM symbol transmission within self-contained transmission time intervals. Focusing on OFDM with pulse shaping, we propose a pulse shape with smooth transients in the time domain. Performance evaluation shows that an OFDM system with the proposed pulse shape exhibits better robustness against both noise and self-interference in comparison to the OFDM system with cyclic prefix. From the implementation point of view, pulse shaping requires only small modification to the transceiver and negligible computational complexity increase.