基于功放记忆效应的动态X参数模型的研究
为了更加准确地表征功放的记忆效应,提出了一种新的动态x参数功放模型。该模型是对动态x参数模型的一种改进,利用FF(feed—forward)模型技术提取出表征功放记忆效应的核函数,并将其用于代替x参数表达式中的非线性函数。x参数表达式中的静态部分仍采用PHD(polyharmonic distortion)模型的非线性函数,并将动态部分进行合理的简化。相比传统的动态戈参数建模方案,所提模型不仅仿真精度高,而且仿真速度快。经仿真测试NPT1004功放的数据,利用所提出的新的动态x参数模型对功放建模,结果证明了本模型仿真功放的ACPR(adjacentchannel powerratio)的误差减...
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| Published in | 计算机应用研究 Vol. 33; no. 1; pp. 71 - 74 |
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| Main Author | |
| Format | Journal Article |
| Language | Chinese |
| Published |
辽宁工程技术大学 电子与信息工程学院,辽宁 葫芦岛,125105
2016
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| Subjects | |
| Online Access | Get full text |
| ISSN | 1001-3695 |
| DOI | 10.3969/j.issn.1001-3695.2016.01.016 |
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| Summary: | 为了更加准确地表征功放的记忆效应,提出了一种新的动态x参数功放模型。该模型是对动态x参数模型的一种改进,利用FF(feed—forward)模型技术提取出表征功放记忆效应的核函数,并将其用于代替x参数表达式中的非线性函数。x参数表达式中的静态部分仍采用PHD(polyharmonic distortion)模型的非线性函数,并将动态部分进行合理的简化。相比传统的动态戈参数建模方案,所提模型不仅仿真精度高,而且仿真速度快。经仿真测试NPT1004功放的数据,利用所提出的新的动态x参数模型对功放建模,结果证明了本模型仿真功放的ACPR(adjacentchannel powerratio)的误差减小了3dB,从而验证了该模型的可行性,对今后利用动态x参数对功放的建模具有参考价值。 |
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| Bibliography: | 51-1196/TP dynamic X parameter; memory effects; power amplifier; behavioral model This paper presented a new dynamic X parameter amplifier model, in order to more accurately characterize the memory effects of the power amplifier. The model was an improvement on the dynamic X parameter model. It used FF model- ing techniques to extract the kernel function which was used to represent the memory effects of power amplifier, and replaced the nonlinear expressions in X parameter by the kernel function. The static part of X parameter expressions still used PHD model, and the dynamic part was simplified reasonably. Compared to traditional dynamic X parametric modeling program, the proposed model achieves not only high simulation accuracy, but also fast simulation speed. This paper used the new dynamic X parameter model presented to build model for power amplifier, and simulated and tested NPT1004 power amplifier data. The result shows that this model amplifier ACPR error is reduced 3 dB. It verifies the feasibility of |
| ISSN: | 1001-3695 |
| DOI: | 10.3969/j.issn.1001-3695.2016.01.016 |