While the Global Positioning System (GPS) is best known for its positioning applications, another way to use GPS is as a time reference for telecommunication networks synchronization. However, as every new communication standard is more demanding, the precision of the current single-frequency GPS based network synchronization solutions is about not to be sufficient anymore. The dominant source of error in current state-of-the-art receivers based on the L1 C/A code is due to the variations of the propagation delay through the ionosphere. Fortunately, a new GPS civilian signal, L2CS, is about to be released. Combined with the existing L1 signal, it will allow to cancel most of the ionosphere induced error and therefore offer better timing signals as compared to classical GPS receivers. In this paper, a dual-frequency front-end for long antenna-GPS receiver links is presented.
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机译：虽然全球定位系统（GPS）是其定位应用的最适合，但另一种使用GPS的方法是电信网络同步的时间参考。然而，随着每个新的通信标准更苛刻，当前的单频GPS基于网络同步解决方案的精度仍然是不够的。基于L1 C / A代码的当前最先进的接收器中的主导误差来源是由于通过电离层的传播延迟的变化。幸运的是，即将释放新的GPS民用信号L2CS。结合现有的L1信号，它将允许取消大部分电离层诱导误差，因此与古典GPS接收器相比提供更好的定时信号。在本文中，提出了用于长天线-GPS接收器链路的双频前端。
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