MIMO-NOMA Design for Small Packet Transmission in the Internet of Things
MIMO-NOMA Design for Small Packet Transmission in the Internet of Things
复制标题
物联网小包传输的MIMO-NOMA设计
DOI：
10.1109/access.2016.2551040
复制
发表时间：
2016-01-01
期刊：
影响因子：
3.9
通讯作者：
Poor, H. Vincent
中科院分区：
文献类型：
--
作者：
Ding, Zhiguo;Dai, Linglong;Poor, H. Vincent
物联网（IoT）的一个特点是，系统中的一些用户需要快速服务于小数据包传输。针对这一要求，本文设计了一种新的多输入多输出非正交多址接入（MIMO-NOMA）方案，其中一个用户的服务质量严格满足要求，而另一个用户则利用NOMA的概念进行机会主义服务。这种新方案的新奇在于，它面临现有MIMO-NOMA方案依赖于用户的信道条件不同的假设的挑战，这是一个在实践中可能无效的强假设。所提出的预编码和检测策略可以有效地在用户的有效信道增益之间产生显著差异，因此，即使用户的原始信道条件相似，也可以实现NOMA的潜力。分析和数值结果表明，所提出的MIMO-NOMA方案的性能。
A feature of the Internet of Things (IoT) is that some users in the system need to be served quickly for small packet transmission. To address this requirement, a new multiple-input multiple-output non-orthogonal multiple access (MIMO-NOMA) scheme is designed in this paper, where one user is served with its quality of service requirement strictly met, and the other user is served opportunistically by using the NOMA concept. The novelty of this new scheme is that it confronts the challenge that the existing MIMO-NOMA schemes rely on the assumption that users' channel conditions are different, a strong assumption which may not be valid in practice. The developed precoding and detection strategies can effectively create a significant difference between the users' effective channel gains, and therefore, the potential of NOMA can be realized even if the users' original channel conditions are similar. Analytical and numerical results are provided to demonstrate the performance of the proposed MIMO-NOMA scheme.