扩频通信信号多分辨重叠正交变换抗干扰仿真  

Simulation of Anti-Interference for Multi-Resolution Overlapping Orthogonal Transformation of Spread Spectrum Communication Signals

作　　者：李志博[1] 韩金玉[1] LI Zhi-bo;HAN Jin-yu(Tianjin Sino-German University of Applied Sciences,Tianjin 300350,China)

机构地区：[1]天津中德应用技术大学,天津300350

出　　处：《计算机仿真》2024年第8期238-241,378,共5页Computer Simulation

基　　金：天津市技术创新引导专项(22YDTPJC00790)。

摘　　要：为了提高扩频通信安全性能,提出一种基于滤波器的扩频通信信号抗干扰方法。分析扩频通信信号多分辨重叠的变化特点,针对变化特点利用综合滤波器倒转通信信号的冲激响应时间,并通过滤波器分解扩频通信信号。分析扩频通信信号有源干扰机理,实现噪声干扰辨别,获取多分辨变换域矢量条件。在此基础上,基于滤波器的输入状态和输出状态得出扩频通信信号的估计误差,对接收信号的矢量进行多分辨重叠正交变换,并修正信号的子带能量估计结果。最后引入前向纠错编码方法提高扩频通信信号在弱信号环境中的抗干扰性能,确保通信信号可靠传输。通过实验验证在不同参数条件下所提方法的抗干扰效果,通过对比结果证明上述方法能有效地实现扩频通信信号抗干扰。In order to improve the security of spread spectrum communication,a filter-based anti-interference method for spread spectrum communication signals was presented.Firstly,we analyzed the characteristics of hierarchical lapped transforms in spread spectrum communication signals.On this basis,we used a comprehensive filter to reverse the impulse response time of the communication signal and decompose the spread spectrum communication signal.Secondly,we analyzed the active interference mechanism of spread spectrum communication signals,thus achieving the noise interference discrimination and obtaining multi-domain vector conditions of hierarchical lapped transforms.Based on the input and output states of the filter,we calculated the estimation error of the spread spectrum communication signal.Moreover,we performed the hierarchical lapped orthogonal transform on the vector of the received signal,and then corrected the sub-band energy estimation result of the signal.Finally,we used the forward error correction coding method to improve the anti-interference performance of spread spectrum communication signals in weak signal environments,thus ensuring reliable transmission of communication signals.The anti-interference effect of the proposed method under different parameter conditions was verified through experiments.The comparison results show that this method can effectively achieve anti-interference of spread spectrum communication signals.

关 键 词：多分辨重叠变化扩频通信:信号抗干扰 子带能量估计 

分 类 号：TP391[自动化与计算机技术—计算机应用技术]