数字伪码跟踪环中的野值剔除新方法

针对伪码跟踪环中由于相位误差鉴别结果出现野值而导致跟踪性能下降的问题,提出了一种野值剔除方法. 该方法根据伪码跟踪环中鉴别器的鉴别范围及环路的跟踪状态,调节野值剔除门限. 与常规伪码跟踪环相比,采用该方法的环路具有更高的跟踪精度和抗干扰能力. 仿真结果表明,设计方法通过有效剔除环路鉴别器输出的野值,提高了伪码跟踪环的跟踪精度和稳定性.

A New Method of Wild Value Elimination for Digital Code Tracking Loop

In view of the problem that the tracking performance declines caused by wild value from phase error discriminator, this paper proposes a new method of wild value elimination. The method adaptively regulates elimination threshold for wild value based on the range of phase error discrimination and loop state of code tracking loop. Simulation results indicate that the principle of the method is correct and it performs well for code tracking loop. Compared with the normal code tracking loop, it is seen that the loop using this method has high precision and strong anti-jamming capacity.