GPS和罗兰C导航系统抗压制式干扰分析

Analysis of Anti-oppressive Interference of GPS and Loran-C Navigation System

基于GPS和罗兰C导航系统的原理及信号传播特点,在考虑地球曲率、大气折射、电磁衰减、地波损耗等因素条件下,研究大功率干扰机对2种导航系统压制式干扰效果的问题。介绍GPS系统和罗兰C系统,通过计算GPS接收机最低干扰功率和GPS接收机的干扰距离分析GPS干扰机作用模型,同时,研究罗兰C干扰机作用模型,并对2种系统进行算例分析。研究结果表明:在相同干扰距离上,要达到同样的干扰效果,对罗兰C系统的压制干扰功率要远大于GPS系统;因此,用罗兰C作为GPS导航系统的备份可在一定程度上解决GPS导航系统抗干扰能力弱的问题。

Based on the theory and signal transmitting characteristics of GPS and Loran-C, considering the curvature ofthe earth, atmosphere refraction, electromagnetism attenuation, and earth-wave loss and other factors, study the effect of 2kinds of navigation system with high power jamming machine. Introduce GPS system and Loran C system, by calculatingthe minimum interference power of the GPS receiver, and the interference distance of the GPS receiver, the model of theGPS interference machine is analyzed, at the same time, study on the effect of Loran C interference model, and 2 kinds ofsystems are analyzed. The results show that under the same interference distance, to achieve the same effect of interference,the interference power of Loran-C is much larger than GPS system; therefore, Loran-C working as a backup of GPS canhelp to solve the problem of poor anti-inference ability of GPS to some extent.