A Tangent Approximation Coefficient Extraction Method for Instantaneous Sample Indexed Magnitude-Selective Affine Behavioral Model

IF 2.9 2区工程技术 Q2 ENGINEERING, ELECTRICAL & ELECTRONIC

IEEE Microwave and Wireless Components Letters Pub Date : 2022-11-01 DOI:10.1109/LMWC.2022.3186036

Zhuang Xu, Jianfeng Zhai, Kai Wang, Jiawen Liu, Xuefa Zhai, Yan Guo, Chao Yu

引用次数: 0

Abstract

The coefficients of digital predistortion (DPD) models are often extracted by the least square (LS) method, which has high computational complexity because of the operations of the large matrix. In this letter, a low complexity coefficient extraction method for instantaneous sample indexed magnitude-selective affine (I-MSA) model is proposed. The proposed method uses the tangent of the midpoint of the piecewise function to fit the curve. Therefore, the LS coefficient extraction only needs a small amount of data near the midpoint, rather than using all the data in the segmented region. Simulation and experimental results have confirmed that compared with the original LS method, the proposed method has similar modeling accuracy and linearization performance, but the computational complexity of coefficient extraction is greatly reduced.

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一种瞬时样本索引幅度选择仿射行为模型的切线近似系数提取方法

数字预失真（DPD）模型的系数通常采用最小二乘法提取，由于矩阵运算量大，最小二乘法具有较高的计算复杂度。本文提出了一种用于瞬时样本索引幅度选择性仿射（I-MSA）模型的低复杂度系数提取方法。所提出的方法使用分段函数中点的切线来拟合曲线。因此，LS系数提取只需要中点附近的少量数据，而不需要使用分割区域中的所有数据。仿真和实验结果表明，与原来的LS方法相比，该方法具有相似的建模精度和线性化性能，但大大降低了系数提取的计算复杂度。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

IEEE Microwave and Wireless Components Letters 工程技术-工程：电子与电气

自引率

13.30%

发文量

376

审稿时长

3.0 months

期刊介绍： The IEEE Microwave and Wireless Components Letters (MWCL) publishes four-page papers (3 pages of text + up to 1 page of references) that focus on microwave theory, techniques and applications as they relate to components, devices, circuits, biological effects, and systems involving the generation, modulation, demodulation, control, transmission, and detection of microwave signals. This includes scientific, technical, medical and industrial activities. Microwave theory and techniques relates to electromagnetic waves in the frequency range of a few MHz and a THz; other spectral regions and wave types are included within the scope of the MWCL whenever basic microwave theory and techniques can yield useful results. Generally, this occurs in the theory of wave propagation in structures with dimensions comparable to a wavelength, and in the related techniques for analysis and design.