Outage Performance Analysis for Wireless Non-Orthogonal Multiple Access Systems
Outage Performance Analysis for Wireless Non-Orthogonal Multiple Access Systems
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DOI：
10.1109/access.2018.2789581
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发表时间：
2018-01
期刊：
影响因子：
3.9
通讯作者：
Jinglun Wang;Bin Xia;Kexin Xiao;Yichen Gao;Shaodan Ma
中科院分区：
文献类型：
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作者：
Jinglun Wang;Bin Xia;Kexin Xiao;Yichen Gao;Shaodan Ma
非正交多址接入（NOMA）技术因其能够支持大规模无线移动的终端而成为一种很有前途的空中接口技术。本文分析了在独立非同分布（i.ni.d.）衰落环境我们从理论上揭示了一般的方法来获得封闭形式的中断概率表达式为任意数量的服务用户。在身份证下面。在衰落环境下，基于对每个用户的时变接收功率强度的观察，分别导出每个可能的解码顺序的概率。此外，针对多维积分求解的难题，提出了一种递归方法，将一定译码顺序下的条件中断概率作为一个具有译码顺序和所需数据速率线性约束的联合概率问题来处理。最后，我们推导出封闭形式的中断概率表达式。仿真结果验证了理论结果的准确性，并揭示了动态模式比固定模式的优越性。
Non-orthogonal multiple access (NOMA) is a promising air-interface technology for its ability to support massive wireless mobile terminals. In this paper, the outage performance for uplink NOMA systems employing the dynamic ordered successive interference cancellation receiver is analyzed under the independent but not identically distributed (i.ni.d.) fading environment. We theoretically reveal the general approach to derive the closed-form outage probability expression for an arbitrary number of serving users. Under the i.ni.d. fading environment, the probability for each possible decoding order is derived respectively based on the observation of the time-varying received power strength for each user. Furthermore, encountering the challenge of solving the multidimensional integration, a recursive method is proposed to deal with the conditional outage probabilities under a certain decoding order as a joint probability problem with the linear constraints of the decoding order and the required data rate. Finally, we derive the closed-form outage probability expressions. The simulations are performed to validate the accuracy of the theoretical results and reveal the superiority of the dynamic mode over the fixed one.