DOI码：10.1109/TMTT.2016.2642945

发表刊物：IEEE Transactions on Microwave Theory and Techniques

项目来源：NSFC 61471333

关键字：Analog-to-digital converter (ADC), digital predistortion (DPD), error signal, linearization, low resolution, power amplifier (PA), wideband

摘要：In this paper, we propose a low-cost data-acquisition approach for model extraction of digital predistortion (DPD) of RF power amplifiers. The proposed approach utilizes only 1-bit-resolution analog-to-digital converters (ADCs) in the observation path to digitize the error signal between the input and output signals. The DPD coefficients are then estimated based on the direct learning architecture using the measured signs of the error signal. The proposed solution is proved feasible in theory, and the experimental results show that the proposed algorithm achieves the performance equivalent to that using the conventional method. Replacing high-resolution ADCs with 1-bit comparators in the feedback path can dramatically reduce the power consumption and cost of the DPD system. The 1-bit solution also makes DPD become practically implementable in future broadband systems since it is relatively straightforward to achieve an ultrahigh sampling speed in data conversion using only simple comparators.

合写作者：Gang Li,Chongbin Zhou,Wei Tao,Anding Zhu

第一作者：Haoyu Wang (王昊禹)

论文类型：期刊论文

通讯作者：Falin Liu

论文编号：10.1109/TMTT.2016.2642945

学科门类：工学

文献类型：J

卷号：65

期号：7

页面范围：2465 - 2475

是否译文：否

发表时间：2017-07-01