Comparative Study of Pruned DFT Spread and PPN FBMC-OQAM System for 5G Communications Under Line of Sight Cond
The 5G use cases belong to the Ultra-reliable and low latency category require very good spectral efficiency, ultra low latency, lower PAPR and very high throughput. A single technology can not satisfy all the 5G requirements, always a tradeoff between the requirements and the filtering technique used. The existing Cyclic Prefix based OFDM has certain inherent disadvantages such as larger PAPR, less spectral efficiency. Single Carrier FDM (SC-FDM) is used in the uplink of the LTE system which has an advantage of Lower PAPR, but it has all other the disadvantages exhibited by OFDM. An innovative method to overcome these disadvantages, that is Pruned DFT spread FBMC with one tap scaling which is proposed by Ronald Nissel et.al where it combines the benefits of FBMC-OQAM and SC-FDM systems. This technique provides the benefit of lower PAPR similar to SC-FDM, very low latency, and larger throughput. 5G applications like autonomous vehicle driving, smart city services like - traffic maintenance, smart energy, and smart utility services along with rural connectivity can be supported by using this Pruned DFT Spread FBMC-OQAM system. In this work, Pruned DFT Spread FBMC-OQAM (PDFTSFBMC) system is simulated and tested against Outdoor line of sight (LOS) fading profiles such as Rural Line of Sight (RLOS), Urban Approaching Line Of Sight (UALOS), and Highway Line of Sight (HLOS), which is a necessary component for a for fulfilling the key necessities for 5G communications.