PXI峰值功率分析仪的设计技术研究

Research on design technology of PXI peak power analyzer

介绍了一种PXI峰值功率分析仪的设计技术,该峰值功率分析仪采用PCI接口芯片+FPGA+DSP的紧凑的体系架构,较大的发挥了FPGA的灵活性,并充分利用DSP的数字信号处理能力,可用于采集和处理复杂的微波峰值功率信号。运用多种采样、校准和补偿技术实现对被测脉冲调制信号的多种幅度和时间参数的自动精确的快速测量,校准速度提升超36倍,测量准确度优化率达3%。阐述了PXI峰值功率分析仪的系统框架、整机原理和软件详细设计,对其中的数据采集、功率校准和功率补偿等关键技术进行了重点说明。

This paper has introduced a new design method of PXI peak power analyzer .The PXI peak power analyzer’s compact architecture uses PCI interface chip ,FPGA DSP .It takes full advantage of FPGA＇s agility and DSP＇s data process ability .The analyzer can be used to acquire and process complex microwave peak power signal .Many methods of sampling ,calibration and compensation are used ,in order to make automatic and accurate measurement of input pulse modulation signal for many parameters .T he speed of calibration is improved more than 36 times ,and the accuracy opti‐mization is up to 3% .In this paper ,the system frame ,machine principle and software detailed design are discussed . M any key techniques are emphatically described ,including data acquisition ,pow er calibration and pow er compensation .