虚拟仪器中FFT算法的DSP实现

Implementation of DSP on FFT in Virtual Instrument

采用虚拟仪器是第三代自动测试系统的发展方向,如何实现各种信息的变换与处理是虚拟仪器中需要解决的一个重要问题,本文提出了一种基于DSPC31的通用信号处理模块解决方法,在介绍系统组成的基础上;说明了系统与其他模块的具体接口处理;详细阐述了如何在DSPC31通用信号处理模块上实现按时间抽取基2实序列的快速傅里叶变换(FFT)算法;讨论了“同址计算”和“码位倒置”在DSP中具体实现的一些关键问题。

Virtual instrument is the development direction of the third generation of automatic testing system ,how to carry out the transformation and disposal of varying signals is an important problem in virtual instruments. A kind of general purpose signal processing model based on DSPC31 is presented in this paper.The interface is shown for other models. The implementation Of DIT based 2 real-FFT on DSPC31 is described in detail.