FPGA在某型导弹无线电高度表测试仪中的应用

Application of FPGA on the testor of XX missile altimeter

为更好满足基层部队对导弹高度表的测试需求,设计并阐述了测试仪需要产生的几种测试信号,通过现场可编程逻辑器件FPGA和D/A转换器,采用DDS合成技术对信号进行了合成输出,并给出了生成信号的原理图和仿真图。信号生成的所有功能由硬件描述语言VHDL编程,通过Altera公司的FPGA开发平台QuartusⅡ进行编译,并下载到cycloneⅢ系列的EP3C25Q240C8N芯片调试通过。结果表明采用DDS合成技术可以简化电路,提高生成信号的精度和可靠性,并具备很好的功能延伸性和扩展性。

In order to satisfy the need of the army to test the missile altimeter,the article introduces several sorts of signal that the tester needs to produce,the signal is synthesized through the Direct Digital Frequency Synthesis（DDS） by the FPGA and the D/A converter.All the functions are programmed with the Hardware Description Language VHDL and downloaded into the chip EP3C25Q240C8N of cycloneⅢ series through the Quartus Ⅱ.The result indicates DDS can predigest the circuit and improve the precision and reliability of the signal.,and the fuction of it also have perfect extensibility and expansibility.