In this letter, we study the impact of nonlinear high power amplifier (HPA) on simultaneous wireless information and power transfer (SWIPT), for a point-to-point multiple-input multiple-output communication system. We derive the rate-energy (RE) region by taking into account the HPA nonlinearities and its associated memory effects. We show that HPA significantly degrades the achievable RE region, and a predistortion technique is investigated for compensation. The performance of the proposed predistortion scheme is evaluated in terms of RE region enhancement. Numerical results demonstrate that approximately 24% improvement is obtained for both power-splitting and time-splitting SWIPT architectures.

中文翻译：

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具有功率放大器非线性和记忆效应的 MIMO SWIPT 系统

在这封信中，我们研究了非线性高功率放大器 (HPA) 对点对点多输入多输出通信系统的同步无线信息和功率传输 (SWIPT) 的影响。我们通过考虑 HPA 非线性及其相关的记忆效应来推导出速率-能量 (RE) 区域。我们表明 HPA 显着降低了可实现的 RE 区域，并且研究了一种用于补偿的预失真技术。所提出的预失真方案的性能是根据 RE 区域增强来评估的。数值结果表明，功率分配和时间分配 SWIPT 架构都获得了大约 24% 的改进。