【摘要】 无线电导航系统中,载体动态性引入的多普勒频移对伪码跟踪环的可靠跟踪带来了很大困难。文中对伪码跟踪环噪声性能进行了详细的分析,并提出了一种载波辅助伪码跟踪环路,可以在较窄的环路带宽下跟踪高动态的扩频信号,从而可以很好地抑制宽带噪声,提高跟踪精度。理论分析和仿真结果表明,该方法能有效改善环路的跟踪精度。更多还原

【Abstract】 It is difficult for a receiver in dynamic environment to realize spread spectrum signal tracking in navigation system.Based on tracking error characteristics of traditional code tracking loop,this paper presents a new carrier auxiliary code tracking loop,which operates in narrow bandwidths and improves precision of tracking loop.The loop presented in the paper solves the signal tacking when the receiver is operating in dynamic environment.The analysis and simulations show that carrier assistant code tracking loop is simple,efficient for improving precision of the loop.更多还原