一种基于正交基神经网络的非线性卫星信道预失真补偿算法

摘要

针对卫星信道存在非线性失真严重影响系统性能的问题，提出了一种基于正交基神经网络的预失真补偿算法。该算法利用正交基神经网络的特点，能够一步确定权值，无需迭代，不存在局部极小值问题，计算速度快，误差小，补偿效果明显。%Since the satellite channel nonlinear distortion seriously affects the system performance,a pre⁃distortion compen⁃sation algorithm based on orthogonal neural network is proposed to solve this problem. The algorithm which uses the characteris⁃tics of the orthogonal basis neural network can determine the weight value directly in one step without iteration. It has the advan⁃tages of fast calculation and small error,and has no local minimum.