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Автор: Ding Lei, Ma Zhengxiang, Morgan Dennis, Zierdt Mike, Pastalan John
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Ключові слова:
метод Ньютона, метод Ньютона, Newton`s method
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Анотація:
Power amplifiers (PAs) are essential in communication systems, but are inherently nonlinear. To achieve linearity with good efficiency, PAlinearization is necessary. Digital baseband predistortion is a highly cost-effective way to linearize PAs, but most existing architectures assume that the PA has a memoryless nonlinearity. For wider bandwidth applications, such as wideband codedivision multiple access, PA memory effects can no longer be ignored. Therefore, in order to achieve good linearization performance, the predistorter needs to also have memory structure. In this paper, we propose a new model for the wideband predistorter and a least-squares(LS)/Newton algorithm to estimate the model parameters. Performance of the LS/Newton algorithm is studied through computer simulations. Good linearization performance is achieved by using the new model in an experimental testbed.
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Теми документа
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УДК // Метод найменших квадратів
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