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基于史密斯圆图分析射频放大器的设计 总被引:1,自引:0,他引:1
分析了史密斯圆图与射频放大器的基本理论,研究了将史密斯圆图应用于射频放大器电路的设计.着重对提高电路稳定度和线性度、降低噪声系数和改善输入输出特性进行了分析研究.通过实例分析可得该放大器的增益为20dB,噪声系数最小为2dB,电压驻波比为1.7:1.仿真结果表明该放大器的设计方法具有良好的可行性和实用性。 相似文献
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Prediction of chaotic systems with multidimensional recurrent least squares support vector machines 下载免费PDF全文
In this paper, we propose a multidimensional version of recurrent least
squares support vector machines (MDRLS-SVM) to solve the problem about the
prediction of chaotic system. To acquire better prediction performance, the
high-dimensional space, which provides more information on the system than
the scalar time series, is first reconstructed utilizing Takens's embedding
theorem. Then the MDRLS-SVM instead of traditional RLS-SVM is used in the
high-dimensional space, and the prediction performance can be improved from
the point of view of reconstructed embedding phase space. In addition, the
MDRLS-SVM algorithm is analysed in the context of noise, and we also find
that the MDRLS-SVM has lower sensitivity to noise than the RLS-SVM. 相似文献
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