FFTfrequency

在labview环境下编写实现语音信号的采集播放加噪降噪和滤波功能(Under labview environment prepared to play the voice signals to achieve acquisition plus noise and noise reduction filtering)

labview使用xy绘图控件时对于有的需求要对图像做归一化处理(LabVIEW with XY drawing to achieve normalization)

说明：  NI Style control group, which contains some style controls other than the self-contained controls, can beautify the interface style.

说明：  查找布尔数组中的布尔为真的个数并找出所处索引位置(Find the number of Booleans and index in a Boolean array that are real)

使用labview操作数据库的函数，可以进行插入、删除，查询等操作。(Labview database operations using functions, you can insert, delete, query and other operations.)

基于声卡的测试系统,可以录音并且保存声音文件,可以把声音文件回放,可以离线和在线做波形和频谱(Test system based on the sound card, you can save recordings and sound files, sound files can be playback, you can make offline and online waveform and spectrum)

峭度指标是非平稳信号故障诊断的重要参数。峭度指标对信号中的冲击成分十分敏感，冲击成分能量越大，其峭度值就会越大，在故障诊断的时域分析中十分重要。本文件中将其独立做成了一个子vi，便于程序直接调用。(Kurtosis index is an important parameter of non-stationary signal fault diagnosis. The kurtosis index is very sensitive to the impact component in the signal. The greater the energy of the shock component, the greater the kurtosis of the signal, and it is very important in the time domain analysis of the fault diagnosis. This document will be independent of a sub VI, to facilitate direct calls to the program.)

信号分析中功率谱的分析方法 一种简单的Labview程序(Signal analysis method of power spectrum analysis)

第一部分产生最大128位随机数 第二部分用汉明距离检测误码率 第三部分，第一和第二再加调制（BPSK+QPSK）加白高斯噪声通道awgn，得到结果并用图形显示。(part1: source.vi generate a ramdom bit sequence. part2: erro detection get BER via Humming Dacetance. Part3: part 1+ 2, and modelation (BPSK or QPSK), and AWGN,get BER and show it in diagram.)

labview产生波形并显示，对波形图表的曲线控制(Labview generates waveform and displays it, and controls the curve of waveform chart)