基于RTX的虚拟无线电高速数据接口实时性研究

摘要

Virtual radio receives extensive attention in the industry due to its advantages of friendly interface,broad user base,easy to maintain and upgrade.However the defect of no real-time is the main factor restricting its application prospect.Using RTX to improve the real-time capability of Windows is an effective method to expend applications of this system.A high speed data interface of virtual radio has been designed based on RTX by completing FPGA program with XILINX ML605 development board and designing drivers with RTX system.Further,the real-time capability of data interface was measured for 1 million times.The experimental results show that the interrupt response time remain below 40 μs and 99.99％ of data is below 20 μs.Consequently,the interrupt response time of data interface base on RTX is relatively stable and achieves real-time performance of 10 μs.%基于Windows的虚拟无线电具备界面友好、用户基础广、易于维护升级等优势,受到业界广泛关注,但其实时性缺陷是制约其应用前景的主要因素.采用RTX提高Windows操作系统实时性是扩展该类系统应用的有效途径.针对RTX虚拟无线电系统,给出了其中的高速数据接口设计方案,提出了基于XILINX ML605开发板完成FPGA程序,基于RTX系统设计驱动程序的方法,进行了数据接口实时性能测试.经过100万次测量,结果显示中断响应时延一直稳定在40μs以下,99.99％的中断响应时延小于20μs,基于RTX的数据接口中断响应时延比较稳定,达到10μs级的实时性能.