A Robust Digital Predistortion Algorithm for 5G MIMO: Modeling a MIMO Scenario With Two Nonlinear MIMO Transmitters Including a Cross-Coupling Effect
A Robust Digital Predistortion Algorithm for 5G MIMO: Modeling a MIMO Scenario With Two Nonlinear MIMO Transmitters Including a Cross-Coupling Effect
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DOI：
10.1109/mmm.2020.2985195
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发表时间：
2020-06
影响因子：
3.6
通讯作者：
Thomas Ackermann;Julian Potschka;Tim Maiwald;A. Hagelauer;G. Fischer;R. Weigel
中科院分区：
文献类型：
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作者：
Thomas Ackermann;Julian Potschka;Tim Maiwald;A. Hagelauer;G. Fischer;R. Weigel
随着 5G 等毫米波通信系统的数据速率不断提高，线性、效率和功耗成为现代通信系统设计的关键品质因数 [1]。一个常见问题是功率放大器 (PA) 设计中无法同时实现高线性度和高效率。因此，当 PA 在接近饱和状态运行以获得最高效率时，必须考虑不需要的谐波和互调失真 [2]、[3]。收发器包含多个电路元件，例如低噪声放大器、混频器和 PA。在这个收发器链中，PA 通常表现出最高的功耗（即，值得最大限度地提高该电路组件的效率以提高整体系统性能）[4]。
Linearity, efficiency, and power consumption are the key figures of merit for modern communication system design [1] as data rates increase toward millimeter-wave communication systems like 5G. A common problem is that both high linearity and efficiency are not simultaneously feasible in power amplifier (PA) design. Hence, when a PA is operated near saturation for highest efficiency, undesired harmonic and intermodulation distortions have to be taken into account [2], [3]. A transceiver comprises several circuit elements, such as a low-noise amplifier, mixer, and PA. In this transceiver chain, the PA usually exhibits the highest power consumption (i.e., it is worthwhile to maximize the efficiency of this circuit component to increase overall system performance) [4].