NOMA网络的资源分配策略综述
首发时间:2022-03-01
摘要:非正交多址接入(Non-Orthogonal Multiple Access, NOMA)具有高吞吐量、海量设备接入、用户通信公平等特点,因此成为了5G中的重要候选技术之一。相对于传统的正交多址接入(Orthogonal Multiple Access, OMA)技术而言,NOMA可以在发射端采用叠加编码、在接收端采用串行干扰消除(Successive Interference Cancellation, SIC)技术实现多个用户同时同频传输信息。本文首先论述了NOMA技术发射端叠加编码和接收端SIC接收机的原理并介绍了典型的NOMA通信系统和NOMA技术的兼容性。然后概述了NOMA网络的资源分配策略,其中包括功率分配、用户分组、信道分配策略。最后对目前研究中存在的挑战和未来的研究方向进行了讨论,为NOMA技术的实际应用打下了基础。
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Overview of Resource Allocation Strategies in NOMA Networks
Abstract:Non-orthogonal multiple access (NOMA) has become one of the important candidate technologies in 5G because of the characteristics of high throughput, massive device access and user communication fairness. Compared with the traditional orthogonal multiple access (OMA) technology, NOMA can use superposition coding at the transmitter and successive interference cancellation (SIC) technology at the receiver to realize the multiple users\' simultaneous transmission at the same frequency. Firstly, this paper discusses the principle of superposition coding at the transmitter and SIC technology at the receiver of NOMA communication, and introduces a typical NOMA communication system and the compatibility of NOMA technology. Then the resource allocation strategy of NOMA network is summarized, including power allocation, user grouping and channel allocation strategy. Finally, the challenges and future research directions in the current study are discussed, which lay a foundation for the practical application of NOMA technology.
Keywords: wireless communication NOMA resource allocation
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