卫星DSSS通信系统杂乱脉冲干扰抑制技术研究  

Research on disordered pulse interference suppression technologies in satellite DSSS communication systems

作　　者：龚旻[1] 林涛[1] 

机构地区：[1]北京无线电测量研究所,北京100854

出　　处：《系统工程与电子技术》2009年第11期2626-2629,共4页Systems Engineering and Electronics

摘　　要：针对杂乱脉冲干扰卫星直序扩频(direct-sequence spread-spectrum,DSSS)通信系统的问题,首先提出了一种改进自回归(autoregressive,AR)二阶重极点干扰模型。并基于该模型提出了利用有限脉冲响应(finiteimpluse reponse,FIR)双边抽头维纳插值滤波器抑制杂乱脉冲干扰的方法,推导了改进AR二阶重极点干扰模型自相关函数表达式。分析并仿真了在该模型下卫星DSSS通信系统抑制杂乱脉冲干扰时同步互相关峰值的改善。仿真结果表明,基于该模型的FIR线性插值维纳滤波器能有效地抑制杂乱脉冲对卫星DSSS通信系统的干扰。与传统AR模型相比,该模型在多载频和实极点两个方面有更好的工程应用价值。Aiming at the problem that the disordered pulse interference in the satellite direct-sequence spread- spectrum （DSSS） communication system, a finite impluse reponse （FIR） linear transversal interpolation filter based on the improved second order multiple poles interference model is proposed. This article gives the detailed auto-correlation function expression of the model. On the basis of the model, the change of DSSS communication system cross-correla- tion values with the interference of disordered pulses is analyzed. Both of analysis results and numerical simulation re- sults show that the FIR linear transversal interpolation filter based on the improved second order multiple poles inter- ference model can suppress the disordered pulse effectively. Compared with the traditional AR model, the improved model has good engineering application in two aspects of multiple carriers and real poles.

关 键 词：杂乱脉冲 卫星DSSS通信系统 改进AR干扰模型 维纳滤波器 

分 类 号：TN927[电子电信—通信与信息系统]