搜索资源列表
part4
- LED简易音乐频谱,C51程序,基二fft算法-The proposed spectrum procedure is based on two fft
ypxhsc
- 主要产生移频信号,并用FFT解调及频谱校正,在频域显示。-Mainly produce frequency shift signal, and with FFT demodulation and spectrum correction, in the frequency domain display.
bjp
- fft与边际谱的对比,并画出hilbert图和三维时频谱图-compare fft with marginal spectrum and plot the hilbert figure and 3d time-frequency picture
chengxu
- 小波变换进行变速箱故障诊断 首先将s1和s2信号时域谱(s1代表维修前的振动信号,s2代表维修后的振动信号),画出来进行对比,会发现s1信号的振动幅值会比较高;然后对s1和s2分别进行小波分解并画出各层的时域谱,只对比s1和s2分后的最高时域谱,s2更加的具有周期性,且幅值较小,s2周期性不够明显,且振动过于密集。分析完时域谱后开始分析频谱,首先对原信号s1和s2fft转换,得到频谱图,如图,然后再对小波分析后高频部分进行fft转换,做出频谱图。对比后我们发现,在f 2375HZ出(也就是齿
cxy_snr
- CXY 可用来验证: 1、不同FFT点数的结果*2/M 真实幅度(电压值)(第一二行图) 2、验证计算Ps,Pn及SNR的方法,通过构造加AWG噪声的信号来印证(第二三行图) 3、对比N在整周波和非整周波情况下的通过SNR观察频谱泄露效应(第三行图)- CXY can be used to verify: 1, the result of different FFT points* 2/M true amplitude (voltage value) (f
Spectrum
- 利用快速傅里叶变换的最简洁的51单片机音乐频谱仪-Leveraging FFT the simplest 51 single-chip music spectrum analyzer
labview-pinpu
- 基于labview的频谱分析,简单的fft快速傅里叶变换-Spectrum analysis based on LabVIEW , Simple FFT fast Fourier transform
66256063
- FFT子程序编写及应用和FFT对连续信号进行频谱分析,很好-FFT subroutine writing and application and FFT spectrum analysis was carried out on the continuous signal, is very good
myfft
- 求频谱的函数fft, x为输入信号,fs为采样频率,y为fft后的数据-The function of the spectrum fft, x for the input signal, fs for the sampling frequency, y is fft after the data
0662503
- FFT子程序编写及应用和FFT对连续信号进行频谱分析,很好-FFT subroutine writing and application and FFT spectrum analysis was carried out on the continuous signal, is very good
06215483
- FFT子程序编写及应用和FFT对连续信号进行频谱分析,很好-FFT subroutine writing and application and FFT spectrum analysis was carried out on the continuous signal, is very good
FFT_example3
- 采样数据过少,运用FFT变换不能分辨出其中的频率成分。添加零后可增加频谱中的数据个数,谱的密度增高了,但仍不能分辨其中的频率成分,即谱的分辨率没有提高。只有数据点数足够多时才能分辨其中的频率成分。-Sampling data is too small, the use of FFT transform can not distinguish the frequency components. Adding zero can increase the number of data in the s
myGraduationDesign
- 基于STM32的频谱分析仪,包括FFT和小波变换,使用UCOS操作系统,带触控界面- U57FA u4E8ESTM32 u7984 u9891 u8C31 u5206 u6790 u4EEA uFF0C u5305 u62ECFFT u548C u5C0F u6Cc0 u53D8 u6362 uFF0C u4F7F u7528UCUS u64CD u4F5C u7CFB u7EDF uFF0C u5E26 U89E6 u63A7 u754
resonance-demodulation
- FFT,包络解调,共振解调,包络检波,倒频谱-FFT, envelope demodulation, envelope demodulation, cepstrum, demodulated resonance
fftfilter.m
- 显示fft图像,仅显示其中300个点,进而使得整个频谱显示得非常清晰-show fft image, only show 300 points, so the fft image show clearly
end
- FFT子程序编写及应用和FFT对连续信号进行频谱分析,很好-FFT subroutine writing and application and FFT spectrum analysis was carried out on the continuous signal, is very good
DTFT
- 应用FFT对典型信号进行频谱分析,应用FFT实现序列的线性卷积和相关(FFT is used to analyze the spectrum of typical signals, and the linear convolution and correlation of sequences are realized by FFT)
信号与系统应用
- 信号与系统的应用,对同一个连续周期信号,选定不同采样间隔 s T 和信号截取长度 1 T ,获得离散 信号,使用DFT或FFT 进行频谱分析,画出频谱图,与理论计算的结果进行比 较,观察: (1)不同采样率 s T 对频率范围和混叠误差的影响; (2)不同采样长度 1 T (单周期采样和多周期采样)对频率分辨率的影响; (3)是否完整周期采样对泄漏误差的影响,多周期采样是否可以减小非完整周 期采样产生的泄漏误差。 以下信号中叠加了一个角频率为50 ? 的高频干扰信号,信号如下: 3 (
cw_iq_fft
- 彩超CW的IQ数分析,做fft变换,看频谱的能量(Color Doppler ultrasound CW IQ number analysis, do FFT transform, look at the spectrum of energy)
goed
- FFT子程序编写及应用和FFT对连续信号进行频谱分析,很好(FFT subroutine writing and application and FFT spectrum analysis was carried out on the continuous signal, is very good)