卫星DSSS通信系统杂乱脉冲干扰抑制技术研究

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（finite impluse 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。

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

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.