多通道GNSS数据采集平台的设计与实现

The design and implementation of multi-channel GNSS data acquisition platform

随着GNSS系统的发展,多径效应逐渐成为影响定位精度和可靠性的重要因素之一。为了验证天线阵列方法对于多径效应的消除情况,需要对多个天线接收到的数据进行实时同步采集存储。为了实现这一目标,利用基于PCIE通信总线的FPGA开发板与多路AD采集卡设计并实现了满足系统要求的数据采集平台。首先简要介绍了该采集平台的结构及PCIE通信链路的搭建,然后设计实现了一种数据连续存储的方法,最后通过实验验证了该方法的可行性及采集平台的整体性能。

With the development of GNSS systems, multi-path has become to one of the important factors that influence the positioning accuracy and reliability. In order to test the multi-path eliminating status with the method of antenna arrays, the requested platform needs to collect and save the data from each antenna at the same time.In order to achieve this target, this paper uses the PCIE-based FPGA development board and multi-channel AD acquisition card to make a data collection platform. This paper begins with a brief introduction of the structure of this data collection platform and the construction of the communication link by PCIE bus,then it proposes a mechanism for consecutive data storage.Finally a experiment is designed to verify the feasibility of the method and the performance of the whole platform.