航空飞机计算机通信中滤波器的优化设计

Optimal Design of Airborne Filter in Computer Communication

摘要:

航空飞机计算机通信系统进行通信的过程中,由于航空飞机上的电子设备相互之间的电磁干扰严重,导致信道中存在大量的干扰信号;提出基于小波变换算法的抗干扰滤波器设计方法;根据小波变换算法相关原理,综合航空飞机通信中特有的软阈值特点,利用自适应调整参数的方法得到高空通信中的最优小波系数阈值,使得高空噪声过滤阈值函数具有更强的适应性;利用新的阈值函数设计了新的滤波器,对行滤波模块和列滤波模块的设计进行了详细阐述;实验结果表明;利用设计的滤波器能够对航空飞机计算机通信过程中的干扰信号进行有效滤波,缩短了滤波时间,提高了高空通信系统的抗干扰能力。

Abstract:

Aviation aircraft in the process of communication,between electronic equipments electromagnetic interference is serious, results in the presence of large amounts of jamming signal in the channel. Proposed anti-jamming filter design method based on wavelet transform algorithm. According to the principle of wavelet transform algorithm is related, peculiar to general aviation aircraft communication soft threshold characteristics, the method of using the adaptive adjustment of parameters to get the optimal threshold wavelet coefficients of high communication, makes the high noise filtering threshold function has better adaptability. Using the new threshold function design of the new filter,introduction to the design of line filter module and column filter module in detail in this paper. The experimental results show that. Of aviation aircraft using the designed filter can effectively filter interference signals in the process of computer communication, shortens the time of filtering and improve the anti-interference ability of the communication system of high altitude. 