低复杂互操作GNSS信号处理器及其性能

P. Kovář, P. Kačmařík, F. Vejražka
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引用次数: 7

摘要

近年来全球导航卫星系统的发展和国际合作导致了全球导航卫星系统的互操作性和兼容性等重要技术问题。在可互操作的接收机中,最昂贵的部分-前端-可以共享用于不同系统的信号接收。信号处理器的统一也是可能的,但性能会有一些小的下降,但硬件复杂性的降低是相当可观的。分析了经典E-L相关器处理各种GNSS信号的适用性,并与最优方法进行了性能比较。针对GPS、Galileo和GLONASS系统,提出了一种基于FPGA的低复杂度互操作软件接收机处理器。给出了对伽利略E1和E5信号的测试结果。论文的最后部分提出了一种基于大众市场组件的低成本多系统GNSS接收机架构。
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Low complex interoperable GNSS signal processor and its performance
The recent development of the GNSS systems and international cooperation resulted in important technical problems of the GNSS systems which are an interoperability and compatibility. In the interoperable receivers the most expensive parts - front ends - can be shared for signals reception of different systems. The unification of the signal processor is also possible with some small performance deterioration but the hardware complexity reduction is considerable. The paper analyses applicability of a classical E-L correlator for processing of various GNSS signals and compare its performance with optimal method. The low complex interoperable processor of software receiver based on a FPGA for the GPS, Galileo and GLONASS systems is proposed. The results of testing on the Galileo E1 and E5 signals are presented. The last part of the paper proposes architecture of a low cost multi system GNSS receiver based on mass market components.
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