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基于软件无线电的VOR射频激励源研究

马腾达a,樊智勇b,王凯a   

  1. (taptap下载安装安卓a.电子信息与自动化学院;b.工程技术训练中心,天津300300)
  • 收稿日期:2015-09-24 修回日期:2015-12-07 出版日期:2016-08-26 发布日期:2016-10-13
  • 作者简介:马腾达(1988—),男,天津人,助教,硕士,研究方向为航电系统仿真验证.
  • 基金资助:

    中国民用航空局科技基金重大专项(MHRD20130112)

VOR RF actuator research based on software defined radio

MA Tengdaa, FAN Zhiyongb, WANG Kaia   

  1. (a. College of Electronic Information and Automation; b. Engineering Techniques Training Center, CAUC, Tianjin 300300, China)
  • Received:2015-09-24 Revised:2015-12-07 Online:2016-08-26 Published:2016-10-13

摘要:

在对机载VOR 接收机进行测试与维护时,需要提供可以模拟地面台射频信号的激励源;目前使用的射频激励源一般为传统的专用硬件设备,存在调制参数固定、无法灵活调节等问题。为解决该问题,对VOR 射频信号原理进行了分析,基于软件无线电原理,对VOR 射频激励源进行了设计;采用零中频软件无线电结构,在计算机上实现对VOR射频信号的正交调制,从而能够对调制参数进行灵活调节,并通过通用的硬件平台发射VOR 射频信号;系统可通过人机交互界面、网络或GPIB 方式进行控制。使用频谱仪对系统进行了测试,并将输出的射频信号进行记录后,导入到Matlab 进行分析验证。结果表明,系统误差在允许的范围内,能够为VOR 接收机提供符合要求的射频信号。

关键词: 甚高频全向信标, 软件无线电, 射频激励, 零中频曰正交调制, PXI总线

Abstract:

To test and maintain the VOR receiver, an actuator which can simulate the ground station RF signal is needed.The current use of RF actuator is generally traditional special hardware equipment, the parameters could not be adjusted flexibly, and the price is higher. In order to solve this problem, the principles of VOR RF signal are analyzed; VOR RF actuator based on SDR is designed. The zero-IF software radio structure is used. The RF signal transmitted through the universal hardware platform is quadrature modulated on computer, and the modulation parameters can be adjusted flexibly. The system could be controlled through human-machine interface,network or GPIB. The system is tested by spectrum analyzer and RF signal of the system is recorded and analyzed through Matlab. Results show that the system error is acceptable according to relevant standards, and could provide the VOR receiver with adjustable RF signal.

Key words: VOR, SDR, RF excitation, zero-IF, quadrature modulate, PXI bus

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