Wireless Communications Research Group, Faculty of Electrical and Electronics Engineering, Ton Duc Thang University, Ho Chi Minh City 700000, Vietnam.
Faculty of Electronics Technology, Industrial University of Ho Chi Minh City (IUH), Ho Chi Minh City 700000, Vietnam.
Sensors (Basel). 2020 Jan 10;20(2):386. doi: 10.3390/s20020386.
As one of key technologies of future networks, vehicle-to-everything (V2X) communication has recently been proposed to improve conventional vehicle systems in terms of traffic and communications. Main benefits of using V2X are efficient and safe traffic as well as low-latency communications and reliable massive connections. Non-orthogonal multiple access (NOMA) scheme was introduced as a promising solution in the fifth-generation (5G) mobile communications, by which quality-of-service (QoS) requirements of many 5G-enabled applications are satisfied as a result of improved network throughput and lower accessing and transmission latency. In this paper, we study NOMA-based communications between vehicles equipped with multiple antennas over Nakagami-m fading channels in V2X networks, in which uplink and downlink transmission between two vehicles with upper controller are supported by a road side unit (RSU) to increase the capacity rather than simply be connected to the base station. In the NOMA-V2X system under study, the outage probability depends on the power allocation factor of RSU transmission and the operation of successive interference cancellation (SIC) at vehicles. Analyses and simulations verify that the outage performance of NOMA-V2X system are mainly affected by fading parameters, levels of imperfect SIC, and power allocation factors.
作为未来网络的关键技术之一，车对一切（V2X）通信最近被提出，以提高传统车辆系统的交通和通信能力。使用 V2X 的主要好处是高效和安全的交通以及低延迟通信和可靠的大规模连接。非正交多址（NOMA）方案作为第五代（5G）移动通信中的一种有前途的解决方案被引入，通过该方案，由于网络吞吐量的提高以及较低的接入和传输延迟，满足了许多 5G 应用的服务质量（QoS）要求。在本文中，我们研究了配备多天线的车辆在 V2X 网络中经过 Nakagami-m 衰落信道的基于 NOMA 的通信，其中两个具有上位控制器的车辆的上行链路和下行链路传输由路边单元（RSU）支持，以增加容量，而不是简单地连接到基站。在所研究的 NOMA-V2X 系统中，中断概率取决于 RSU 传输的功率分配因子和车辆中连续干扰消除（SIC）的操作。分析和仿真验证了 NOMA-V2X 系统的中断性能主要受衰落参数、不完善 SIC 水平和功率分配因子的影响。
