一种系统辨识的自适应迭代算法

Huan Li, Chengsheng Pan
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引用次数: 0

摘要

针对wcdma系统中功率放大器具有记忆效应的非线性放大特性,建立了数字预失真器模型,提出了带记忆的Wiener功率放大器模型的识别算法。该方法有效地避免了神经网络算法的局部收敛问题。并且对信号的频谱再生有很好的抑制作用。理论分析和计算机仿真验证了该算法的有效性和实用性。
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An Adaptive Iterative Algorthm for System Identification
According to the nonlinear amplification characteristic with memory effection of power amplifier (PA) inWCDMA systems, digital predistorter model is established and an identification algorithm for Wiener PA model with memoryis proposed. The method can avoid the local convergence problem of NG algorithm effectively. Moreover it has a very good suppression of signal spectral regrowth. Theoretical analysis and computer simulation verified the effectiveness and practicability of the algorithm.
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