摘要
卫星导航系统多路复用信号支路信号之间的干扰导致接收信号的自相关函数不完全对称,影响了传统接收机的捕获性能。为了解决上述问题,提出了涉及两个对称相关函数的算法。通过该算法得到的接收信号自相关函数是完全对称的,且可降低其他支路信号或噪声对需要处理的信号的影响。通过仿真验证了新算法在多路复用信号捕获和抑制干扰方面的优越性。
The interference among the tributary signals of the same multiplex signal of the satellite navigation system results in the unsymmetrical autocorrelation function, and influences the receiver's capturing performance. In order to solve the above problems, a new algorithm involving a pair of symmetrical correlation function is presented. The new algorithm is able to get completely symmetrical autocorrelation function and reduce the influence of the noise and the interference from the other tributary signals. The superiority of the method in capturing the multiplexed signal and suppressing the interference is proved through simulation.
出处
《时间频率学报》
CSCD
2015年第3期163-170,共8页
Journal of Time and Frequency
基金
国家自然科学基金委员会重点资助项目(11073022)
中国科学院西部博士专项资助项目(2013BS25)
卫星导航与定位教育部重点实验室(B类)开发基金课题
关键词
导航信号
多路复用
信号捕获
相关函数
navigation signals
multiplex
signal acquisition
correlation function
