快速FFT变换

Labview数据采集编程指南，介绍采集系统的组成及NI的一些硬件。(The manual of DAQ with labview ,including the components of a DAQ system.)

说明：  温度采集，多通道温度采集，实现温度采集。(temperature come on here there is a good solution to fetch temperature.)

选择文件路径读取TDMS文件，选择是否校准，选择数据组名及通道名，对数据进行频谱分析(Spectrum analysis of the data from TDMS file.)

labview编写串口通讯实例，基于ModBus协议，使用串口通讯，与电机驱动器通讯，实现信号写入与读取，从而控制电机(LabVIEW serial communication, signal writing and reading)

采用Labview语言的DAQmx对信号频率尽心采集(DAQmx using Labview language dedicated to signal frequency acquisition)

LabVIEW串行程序与先前上传的EXCEL表存储相结合，可以轻松完成主机的采集波形显示和存储。(LabVIEW serial program, combined with the previously uploaded EXCEL table storage, can easily complete the acquisition waveform display and storage of the host computer.)

对信号进行滤波，频谱分析，以及对滤波器的特性进行分析（基于labview的高级信号处理工具箱）(Filtering, spectrum analysis, and analysis of filter characteristics (advanced signal processing toolbox based on labview))

LABVIEW关于通信系统中QAM的仿真，包含星象图眼图，仿真效果较好(LABVIEW on QAM communication system simulation, including astrological chart eye chart)

航空航天通信技术一般采用模拟通信的频率调制和数字通信的移相键控调制方法。这有利于充分应用信道带宽和能源。频率调制是在一定程度上改变载波或副载波的频率来传输信息的调制方法。移相键控调制是利用载波或副载波的相位跳变来传输信息的调制方法。移相键控又分二相移相键控、四相移相键控和多相移相键控，其中以四相移相键控和八相移相键控调制方法的效率较高(Aerospace communications technology commonly used analog communication of frequency modulation and the digital communication phase shift keying modulation method. This is helpful for making full use of channel bandwidth and energy. Frequency modulation is changed to some extent carrier or subcarrier frequency to transmit information modulation method. Phase shift keying modulation is the use of carrier or subcarrier phase jump to transmit information modulation method. Phase shift keying and binary phase shift keying, four phase shift keying and multiple phase shift keying, of which four phase shift keying and eight phase shift keying modulation method of high efficiency )

可以对单次输入的信号进行滤波分析和图像显示。同时也具备暂停和历史图像保存的功能。 本程序主要针对的是低频率的未知信号，对于高频率信号最好采用单次采样的方式。(The single input signal can be filtered and analyzed, and the image can be displayed. It also has the functions of pausing and preserving historical images. This program is mainly for low frequency unknown signals, for high frequency signals, the best way to use a single sampling.)