高动态宽带信号码跟踪方法仿真分析

Code Tracking Algorithm for Wideband Signals in High Dynamic

针对高动态场景,单独的码环路很难实现跟踪,由于高动态载波跟踪的算法很成熟,通常应用载波跟踪结果对码环路进行辅助,针对窄体制信号,这种方法可以帮助消除码环的动态误差,但对宽体制信号来说,辅助力度减小。从高动态宽带信号码跟踪误差门限以及跟踪精度入手,分析了单独码跟踪算法的易失锁性,理论和仿真验证应用高动态载波跟踪结果辅助码跟踪算法的有效性,且具有高的跟踪精度。这为导航接收机的跟踪算法提供了理论依据。

For high-motion scenes, a single code tracking loop is difficult to lock. The carrier tracking results are usually used for aiding code tracking due to the mature carrier tracking algorithm in high dynamic. But for wideband signals, the auxiliary intensity decrea- ses. In this paper, from tracking threshold and tracking accuracy, analyzes losing lock easily for wideband signals using the individual code tracking algorithm in high dynamic. Then demonstrates the effectiveness of the carrier-aided-code in theoretical and simulation, which find the high tracking accuracy. This provides a theoretical basis for tracking military naviga- tion receiver.