摘要
为提高GPS(全球定位系统)/INS(惯性导航系统)超紧组合系统的抗干扰性,分析了影响超紧组合系统抗干扰性的各种因素。基于传统PLL环路结构,对超紧组合系统建立了具体的数学模型,推导了超紧组合PLL环路的误差来源及每一项误差的计算公式,系统分析了影响超紧组合抗干扰性的因素,包括调整系数、码速率、动态性、相干积分时间、钟及环路带宽等,仿真分析了各种因素对超紧组合系统抗干扰性的影响,总结出提高超紧组合系统抗干扰性的方法。
To improve the anti-jamming of GPS （global positioning system） /INS （inertial navigation system） ultra-tight cou- pled system, various factors that influence on the anti-jamming of ultra-tight coupled system are analyzed. Based on the traditio- nal PLL loop structures, a mathematical model is set up and sources of error of ultra-tight coupled PLL tracking loops are ana- lyzed, including calculation formula of each error. Factors that influence on the ultra-tight coupled system＇s anti-jamming are al- so analyzed, which include adjustment factor, code rate, dynamic, coherent integration time, clocks and loop bandwidth. Fur- thermore, the simulation about how the different factors influence on the anti-jamming is completed. At last, the paper the method of improving the anti-jamming of ultra-tight coupled system are analyzed.
出处
《计算机工程与设计》
CSCD
北大核心
2013年第1期333-337,共5页
Computer Engineering and Design
