电子通信信号的可变带宽接收方法

Study on Variable Bandwidth Receiving Method of Electronic Communication Signal

为了优化电子信息系统的信号接收效果,设计了电子通信信号的可变带宽接收方法。在以50%交叠和无交叠2种信道形式划分多级数字信道后,计算低通原型滤波器的频率响应参数,然后结合邻道合并条件计算电子通信信号的滤波响应频率,从而获取滤波器的邻域叠加条件。根据待接收信号的包络结构更新初始阵元间距,设计电子通信信号的可变带宽接收算法。通过实验可知,只有在75 Hz时的信号幅度为峰值,其余频率的信号幅度均保持最低限度且没有明显的变化,设计方法输出的信号频谱在理想环境与恶劣环境下均没有发生畸变现象。

In order to optimize the signal receiving effect of electronic information system,a variable bandwidth receiving method of electronic communication signal is designed.After dividing the multi-level digital channels in the form of 50%overlap and no overlap,calculate the frequency response parameters of the low-pass prototype filter,and then calculate the filter response frequency of the electronic communication signal combined with the adjacent channel combining conditions,so as to obtain the filter neighborhood superposition condition of the device.According to the envelope structure of the signal to be received,the initial array element spacing is updated,and a variable bandwidth receiving algorithm for electronic communication signals is designed.Through experiments,it can be seen that only the signal amplitude at 75 Hz is a peak value,and the signal amplitudes of other frequencies are kept to a minimum and have no obvious change,the signal spectrum output by the design method has no distortion phenomenon in both ideal environment and harsh environment.