Hardware Design And Implementation Of Multi-Core Cortex -A9 Based Wirless Router On The Train

As the time of big data is coming, wireless network coverage of urban rail transit system is becoming more and more important. The latest PIS system should not only serves people with audio and video information, but also wireless network as well. In recent years, with the development of communication technology and network technology, train wireless technology also got great development.In order to meet people’s needs for train wireless network coverage in big data era, this thesis designs a ARM Cortex-A9 multi-core processor based Wireless Router on the Train. It can not only set up a wireless network in the passenger compartment, but also can connect the 3G and LTE network. And it has the function of real time positioning. Meanwhile, it can also provide a 1080p high definition video output.This thesis proposes a design scheme based on Freescale’s I.MX6 processor according to people’s demand for on-board wireless router at the present stage, and then selects the model of key components.This thesis illustrates the design of the main function modules in detail, including the smallest system, wireless RF module, Ethernet module, high definition display module and power module in the third chapter. In the forth chapter this thesis provides the design and implementation of PCB, including the selection of circuit board stack, layout, routing, checking and preparing work before processing, etc. The thesis introduces the test work of hardware and function, and analyses the corresponding test results in the fifth chapter. Finally, the conclusion is given, and the future development direction is prospected.