基于神经网络集成的数字调制模式识别

The modulation recognition of digital signal based on neural network ensemble

多分类器集成方法往往能获得比单个分类器更好的泛化精度。为解决Bagging和Boosting等集成算法中分类器选择的盲目性和随机性,提出了一种新的神经网络集成方法。在分析神经网络集成泛化误差公式的基础上,利用粒子群算法进行特征选择并保存特征选择的最优解和次优解,引入差异度思想进行基分类器的选择性集成,从而尽量减小集成个体的泛化误差和增大集成的差异度。经计算机仿真研究证明,与Bagging和Boosting集成算法相比,新算法在调制模式的分类识别中具有较好的泛化性能。

Compared with a single classifier, multi- classifier fusion methods had the better generalization performance. In order to resolve the blindness and randomness caused by classifier selection such as Bagging and Boosting algorithms, a new algorithm of neural network ensemble is proposed. Firstly, with the analysis of the generalization error of neural network ensemble, the particle swarm optimization is put forward to obtain the optimum and sub - optimum solutions of the feature sets. Secondly, in order to reduce the generalization error and increase the difference degree of the ensemble individuals, the base classifiers are assembled by introducing the difference degree. Compared with the algorithm of Bagging and Boosting, the computer simulation results show that the generalization performance of this new algorithm is feasible in modulation rec- ognition of digital signal.