改进的BP网络在调制识别中的应用

Modulation Identification Based on Modified BP Network

研究了BP网络初始权值的选择和网络结构的优化方法,在显著减小网络拓扑结构的基础上,提高了网络的泛化能力和识别性能。引入分段传递函数,并根据网络性能调节传递函数,改善了网络的训练速度。改进后的BP网络应用于通信信号调制识别,仿真结果验证了算法的有效性和鲁棒性。

This paper addresses the problem of automatic modulation identification of digital communication signals using a modified BP network. The choice of initial weights and the optimization of the network are discussed. The implementation of the algorithm has been shown to produce significant reduction in the network size with a quick learning process. The performance of the algorithm has been compared and the validity and the robust are shown by the simulation results.