Universal Filtered Multi-Carrier System Based on Selective Mapping

基于选择映射的通用滤波多载波系统

¹ School of Electronics and Information, Northwestern Polytechnical University, Xi'an 710072, China
² School of Physics and Telecommunication Engineering, Zhoukou Normal University, Zhoukou 466000, China

Received: 15 November 2018

Abstract

Internet of things (IoT) and machine-to-machine (M2M) communication are characterized by short periods and bursts. Traditional orthogonal frequency division multiplexing (OFDM) has not meet the demand for such traffic, while IoT and M2M communication will play an important role in the next fifth generation (5G) communication, so it is particularly urgent to study the small packet and low-latency wireless transmission technologies that satisfy IoT and M2M communication. Universal filter multi-carrier (UFMC) is a new kind of filtered wireless transmission mechanism that meets this requirement, but it faces a higher peak-to-average power ratio (PAPR) than OFDM, which affects the energy efficiency of UFMC. Based on the PAPR performance evaluation of several multi-carrier transmission technologies, a universal filtered multi-carrier based on selective mapping (SLM-UFMC) system is proposed, and the relationship between the number of candidate sub-bands and the performance or between the number of carriers and the performance is carried out. The simulation results show that SLM-UFMC can effectively reduce the PAPR of UFMC system, and the PAPR performance is improved by 1.8 dB comparing with the traditional UFMC. It also further indicates that SLM-UFMC is more suitable for IoT and M2M communication in 5G communication.

摘要

物联网(internet of things, IoT)和机器对机器(machine-to-machine, M2M)通信的特点是周期短且突发，传统的正交频分复用技术(orthogonal frequency division multiplexing, OFDM)已经不能适应这种流量的需求，而IoT和M2M通信在未来第五代(fifth generation, 5G)通信中又将占据重要的地位，因此研究满足IoT和M2M通信的小包低时延无线传输技术显得尤为迫切。通用滤波多载波技术(universal filtered multi-carrier, UFMC)正是满足这种需求的一种新型滤波无线传输机制，但是它面临着比OFDM更高峰均功率比(peak-to-average power ratio, PAPR)的问题，这影响了UFMC的能效效率。在对几种多载波传输技术PAPR性能评估的基础上，提出了一种基于选择映射的通用滤波多载波系统(universal filtered multi-carrier based on selective mapping, SLM-UFMC)，并对候选子带个数和载波数与性能之间的关系进行了探究。仿真结果表明：SLM-UFMC能够有效地降低UFMC系统的PAPR，相对于传统UFMC，PAPR性能提高多达1.8 dB。这也进一步表明SLM-UFMC更加适合于5G通信中的IoT和M2M通信。