基于BP算法的低空无线信道数学建模研究

Research on BP algorithm based mathematical modeling of low⁃altitude wireless channel

为了保证低空无线信道功率谱的稳定性,提出基于BP算法的低空无线信道数学建模方法。采用BP算法获取低空无线信道的观测空间,设计信道参数提取流程,完成无线信道参数的提取。根据信道参数处理算法的具体实现步骤,采用迭代计算的方式将处理后的信道参数保存,完成低空无线信道参数处理算法的设计。通过分析低空无线信道数学模型的建立过程,实现基于BP算法的低空无线信道的数学建模。仿真实验结果表明,基于BP算法的低空无线信道数学建模方法与基于EM算法的低空无线信道数学建模方法相比,低空无线信道的功率谱更稳定,具有较好的应用效果。

A BP algorithm based mathematical modeling method of low⁃altitude wireless channel is proposed to ensure the stability of power spectrum of low⁃altitude wireless channel.The BP algorithm is used to obtain the observation space of low⁃altitude wireless channel.The extraction process of channel parameters is designed to complete the extraction of wireless channel parameters.According to the specific implementation steps of the channel parameter processing algorithm,the processed channel parameters are saved by means of the iterative calculation to complete the design of the low⁃altitude wireless channel parameter processing algorithm.The BP algorithm based mathematical modeling of low⁃altitude wireless channel is realized by analyzing the process of establishing the mathematical model of low⁃altitude wireless channel.The simulation experiment results show that,in comparison with the EM algorithm based mathematical modeling method of low⁃altitude wireless channel,the power spectrum of low⁃altitude wireless channel of the BP algorithm based mathematical modeling method is more stable and has better application effect.