A nonlinear filter-based model for concurrent dual-band power amplifiers
A nonlinear filter-based model for concurrent dual-band power amplifiers
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DOI：
10.1109/ieee-iws.2015.7164603
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发表时间：
2015-07
期刊：
影响因子：
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通讯作者：
Changyang Wang;Xiaowei Zhu
中科院分区：
文献类型：
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作者：
Changyang Wang;Xiaowei Zhu
提出了一种基于非线性滤波器的低复杂度并行双频数字预失真模型。该模型节省了大量乘法运算次数，计算精度要求低，易于在硬件平台上实现。此外，该模型实现了与2D-DPD模型几乎相同的线性化性能。用一个宽带GaN HEMT功率放大器对模型进行了验证。在2.55GHz下测试了8dB峰均比间隔为140 MHz的双20 MHz频段信号。该模型只使用18个复杂的多路复用器。通过预失真，ACPR可以从-38dBc提高到-50dBc。
This paper proposes a nonlinear filter-based model with low complexity for concurrent dual-band digital predistortion. The model saves remarkable number of multiplication and needs low precision of calculation, and can be easily realized on hardware platforms. Moreover, this model achieves almost the same linearization performance as the 2D-DPD model. A broadband GaN HEMT power amplifier is used to verify the model. The dual 20MHz band signal with 8 dB PAPR spacing 140MHz are tested at 2.55GHz. The proposed model uses only 18 complex multiplexers. With predistortion, ACPR can be improved from -38dBc to -50dBc.