A Practical Downlink NOMA Scheme for Wireless LANs
A Practical Downlink NOMA Scheme for Wireless LANs
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DOI：
10.1109/tcomm.2020.2965520
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发表时间：
2020-01
影响因子：
8.3
通讯作者：
Pedram Kheirkhah Sangdeh;Hossein Pirayesh;Qiben Yan;K. Zeng;Wenjing Lou;Huacheng Zeng
中科院分区：
文献类型：
--
作者：
Pedram Kheirkhah Sangdeh;Hossein Pirayesh;Qiben Yan;K. Zeng;Wenjing Lou;Huacheng Zeng
非直接多个访问（NOMA）已成为无线网络的新的多个访问范式，尽管其中大多数是在蜂窝网络中的理论探索和绩效分析，但在迄今为止的无线网络方案中，该计划是在此方面进行的。 WLAN和我们的NOMA方案在现实世界中评估其性能。 of SIC at the receivers. On the receiver side, we propose a new SIC method to decode the desired signal in the presence of strong interference. In contrast to existing SIC methods, our SIC method does not require channel estimation to decode the signals, thereby improving its resilience to interference. We have built a prototype of the proposed NOMA scheme on a wireless testbed. Experimental results show that, compared to orthogonal multiple access (OMA), the proposed. NOMA计划可以显着提高用户的日期率（平均93％），并大大提高WLAN的加权总和（平均36％）。
Non-orthogonal multiple access (NOMA) has emerged as a new multiple access paradigm for wireless networks. Although many results have been produced for NOMA, most of them are limited to theoretical exploration and performance analysis in cellular networks. Very limited progress has been made so far in the design of practical NOMA schemes for wireless local area networks (WLANs). In this paper, we propose a practical downlink NOMA scheme for WLANs and evaluate its performance in real-world wireless environments. Our NOMA scheme has three key components: precoder design, user grouping, and successive interference cancellation (SIC). On the transmitter side, we first formulate the precoding design problem as an optimization problem and then devise an efficient algorithm to construct precoders for downlink NOMA transmissions. We further propose a lightweight user grouping algorithm to ensure the success of SIC at the receivers. On the receiver side, we propose a new SIC method to decode the desired signal in the presence of strong interference. In contrast to existing SIC methods, our SIC method does not require channel estimation to decode the signals, thereby improving its resilience to interference. We have built a prototype of the proposed NOMA scheme on a wireless testbed. Experimental results show that, compared to orthogonal multiple access (OMA), the proposed NOMA scheme can significantly improve the weak user’s date rate (93% on average) and considerably improve WLAN’s weighted sum rate (36% on average).