Rate-Splitting Unifying SDMA, OMA, NOMA, and Multicasting in MISO Broadcast Channel: A Simple Two-User Rate Analysis
Rate-Splitting Unifying SDMA, OMA, NOMA, and Multicasting in MISO Broadcast Channel: A Simple Two-User Rate Analysis
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DOI：
10.1109/lwc.2019.2954518
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发表时间：
2020-03-01
影响因子：
6.3
通讯作者：
Poor, H. Vincent
中科院分区：
文献类型：
--
作者：
Clerckx, Bruno;Mao, Yijie;Poor, H. Vincent
考虑到两用户多天线广播信道，这封信表明，具有连续干扰消除（SIC）的线性预编码速率拆分（RS）接收机是用于非正交传输的灵活框架，其概括并包含四种看似不同的策略作为特殊情况，即基于线性预编码的空分多址（SDMA），正交多址（OMA），非正交多址接入（NOMA）基于线性预编码叠加编码与SIC，和物理层组播。这封信研究的总和速率，并分析显示RS如何统一，优于，并专门为SDMA，OMA，NOMA，和多播作为信道强度的差异和用户信道方向之间的角度的函数。
Considering a two-user multi-antenna Broadcast Channel, this letter shows that linearly precoded Rate-Splitting (RS) with Successive Interference Cancellation (SIC) receivers is a flexible framework for non-orthogonal transmission that generalizes, and subsumes as special cases, four seemingly different strategies, namely Space Division Multiple Access (SDMA) based on linear precoding, Orthogonal Multiple Access (OMA), Non-Orthogonal Multiple Access (NOMA) based on linearly precoded superposition coding with SIC, and physical-layer multicasting. This letter studies the sum-rate and shows analytically how RS unifies, outperforms, and specializes to SDMA, OMA, NOMA, and multicasting as a function of the disparity of the channel strengths and the angle between the user channel directions.