双门限判决能够提高测距码检测率，降低虚警率。
Two thresholds can improve the detection rate, and reduce the false alarm rate of ranging codes.
该算法的主要应用领域为卫星定位信号和直序扩频测距信号PN码相位的精确测量。
The algorithm is applicable to precise measuring of the PN code phase of satellite positioning signals and spread-spectrum ranging signals.
本文对高级在轨系统(AOS)提供的等时性业务进行了深入的研究，讨论了利用AOS等时性业务实现伪码测距的可能方案。
In this paper, isochronous service of Advanced Orbit System (AOS) is researched, and the possible schemes for implementing pseudo-random code ranging by using isochronous service of AOS are discussed.
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