Simplified online coefficients updating for digital predistortion of wideband/multi-band RF power amplifiers
Simplified online coefficients updating for digital predistortion of wideband/multi-band RF power amplifiers
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DOI：
10.1109/apmc.2015.7411574
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发表时间：
2015-12
期刊：
影响因子：
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通讯作者：
Yan Guo;Chao Yu;A. Zhu
中科院分区：
文献类型：
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作者：
Yan Guo;Chao Yu;A. Zhu
提出了一种简化的在线系数更新技术，用于实现射频功率放大器（PA）数字预失真（DPD）的实时调谐，特别是针对宽带和并发多频带场景。它是通过相等地加权传统DPD模型中的记忆项来实现的，这导致在系数更新过程中的数值计算复杂度的显著降低，并且因此在真实的系统操作期间节省时间和功率。为了验证所提出的方法，对宽带LTE-A（100 MHz）和并发双频段（20 MHz + 20 MHz）情况进行了测试。实验结果表明，该方法可以实现良好的性能，与传统的方法相比，显着降低了系统的复杂度。
In this paper, a simplified online coefficients updating technique is proposed to realize real-time tuning of digital predistortion (DPD) for RF power amplifiers (PAs), particularly focusing on wideband and concurrent multi-band scenarios. It is achieved by equally weighting the memory terms in conventional DPD models that leads to a significant reduction of numerical calculation complexity in the coefficients updating process and thus saves time and power during real system operation. To validate the proposed method, both wideband LTE-A (100 MHz) and concurrent dual-band (20 MHz + 20 MHz) cases have been tested. Experimental results show that the proposed method can achieve excellent performance with significant reduction of system complexity compared to the conventional approaches.