摘要
介绍基于NIOSⅡ频谱分析系统采用离散傅立叶变换(DFT)算法原理。该系统利用NiosⅡ软核处理器,加上LCD、键盘、AD芯片、滤波器和简单的外围电路,完成了信号的采集、处理和数字DFT,并把结果送到LCD显示。测试结果表明,本频谱分析系统能分析带宽为0~5MHz的信号,分辨率达到1Hz。本系统具有性能稳定、结构简单、操作方便、可在线升级和成本低的优点。
A realization method for spectrum analyzer system of NIO 1I is introduced. The system uses the Discrete Fourier Transform（DFT） algorithm principle, and Nios 11 soft-core processor, coupled with the LCD, keyboard, AD chip filter and a simple external circuit to complete signal acquisition, signal processing, digital D^I＇, and displays the data on the LCD with the help of LCD, The test results shows that the spectrum analyzer system can analyze the signal bandwidth of 5MHz resolution of 1 Hz. This system has a stable performance, simple structure, convenient operation, online upgrade and low cost advantages.
出处
《电子器件》
CAS
北大核心
2013年第6期833-836,共4页
Chinese Journal of Electron Devices
