大规模MIMO系统线性化的功放特性公差

2018 International Conference on Microwave and Millimeter Wave Technology (ICMMT) Pub Date : 2018-05-07 DOI:10.1109/ICMMT.2018.8563858

Jianxin Jing, Jialin Cai, Chao Yu

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引用次数: 1

摘要

针对大规模多输入多输出(MIMO)系统的共享数字预失真(DPD)方案，研究了功率放大器(PA)特性的容限问题。通过建模不同的行为，模型系数的范围可以用来表示pa的相似性，并通过在最小二乘目标函数中添加偏移量来计算。给出了一个16路发射机的仿真结果，结果表明，这些pa只需一个共享DPD就可以线性化，并且所有支路的相邻通道泄漏比(ACLR)可以满足特定的频谱要求，即-45 dBc。

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Tolerance on Power Amplifier Characteristics for the Linearization of Massive MIMO Systems

In this paper, the tolerance of power amplifier's (PA) characteristics is investigated for a shared digital predistortion (DPD) solution for massive multiple-input multiple-output (MIMO) systems. By modeling different behaviors, the range of model coefficients can be employed to indicate the similarity of PAs and calculated by adding an offset to the least-squares objective function. Simulation results of a 16-path transmitter with 16 similar PAs are presented, which show that these PAs can be linearized by only one share DPD and the adjacent channel leakage ratio (ACLR) for all branches can meet the specific spectrum requirement, that is, -45 dBc.

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2018 International Conference on Microwave and Millimeter Wave Technology (ICMMT)

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