2-D Digital Predistortion (2-D-DPD) Architecture for Concurrent Dual-Band Transmitters
2-D Digital Predistortion (2-D-DPD) Architecture for Concurrent Dual-Band Transmitters
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DOI：
10.1109/tmtt.2011.2163802
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发表时间：
2011-09
影响因子：
4.3
通讯作者：
S. Bassam;M. Helaoui;F. Ghannouchi
中科院分区：
文献类型：
--
作者：
S. Bassam;M. Helaoui;F. Ghannouchi
本文提出了一种新的二维数字预失真（2-D-DPD）技术，适用于并发双频发射机的线性化。该技术使用一种独特的方式，通过在每个频段分别选择、表征和应用预失真，对双频段发射机进行失真补偿和线性化。与传统的线性化技术相比，这种2-D-DPD方法对数模转换器和模数转换器的采样率要求较低。使用两个调制信号，全球微波接入互操作性和宽带码分多址，在频率上分开100 MHz的2-D-DPD拓扑结构的性能进行评估。测量结果表明，邻道功率比小于-50 dBc，归一化均方误差小于-40 dB。
This paper presents a novel 2-D digital-predistortion (2-D-DPD) technique that is applicable for linearization of concurrent dual-band transmitters. This technique uses a unique way for distortion compensation and linearization of dual-band transmitters by selecting, characterizing, and applying predistortion in each band separately. Compared to conventional linearization techniques, this 2-D-DPD method requires a lower sampling rate for digital-to-analog and analog-to-digital converters. The performance of the 2-D-DPD topology is evaluated using two modulated signals, Worldwide Interoperability for Microwave Access and wideband code-division multiple-access, separated in frequency by 100 MHz. The measurement results show an adjacent channel power ratio of less than -50 dBc and a normalized mean square error of less than -40 dB.