基于FPGA+DSP的TACAN信号检测仪设计

Design of a TACAN Signal Detection System Based on FPGA + DSP

针对目前塔康(TACAN)设备外场测试能力欠缺的问题,设计了一种以FPGA为控制处理核心、DSP实现信息二次解算、嵌入式组态软件完成人机界面搭建的TACAN信号检测系统。分析了系统的硬件和软件组成,给出了具体的软件流程图,重点介绍了检测仪通信模块设计、角度和距离检测过程并提出了改进算法。系统充分利用FPGA高速采样、并行处理和DSP的实时计算能力,实现了测量参数快速计算及显示控制。从大量外场试验分析得出,该检测系统测试精度高、运行稳定可靠,提高了TACAN设备的维护和使用水平,具有一定工程应用价值。

To solve the problem that the TACAN equipment has limited capacity of field test, a TACAN signal detection system was designed by taking FPGA as the core of the control system, using DSP to implement the secondary information decoding, and a embedded configuration software to build the Human- Machine Interface （HMI）. In this paper, the hardware and software composition is presented, and the software flow chart is given. The communication module design and angle/distance detection process are described with the improved algorithms. The system makes full use of capabilities of FPGA in high-speed sampling and parallel processing and of DSP in real-time computing, thus to realize rapid calculation and display control. The experiment result shows that the design has a good test precision, and it can improve the level of the maintenance and service, which is valuable in engineering.