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fbh
- 使用FFT分析方波信号的频谱,讨论采样点数、采样频率对谱分辨率的影响。对数据叠加白噪声后再次分析实验结果。-Square-wave signal using the FFT spectrum analysis to discuss the sampling points, the sampling frequency of the impact of spectral resolution. White noise superimposed on the data after analysis
sjb
- 使用FFT分析三角波信号的频谱,讨论采样点数、采样频率对谱分辨率的影响。对数据叠加白噪声后再次分析实验结果。-FFT analysis of the use of the triangular wave signal spectrum to discuss the sampling points, the sampling frequency of the impact of spectral resolution. White noise superimposed on the data af
fftfenxi
- 本文通过matlab分析信号在不同采样频率和变换点数的FFT下的频谱图,研究采样频率和变换点数对信号FFT的影响。同时还讨论了信号在不同频带噪声背景下的采样频率和变换点数的选择。-In this paper, matlab sampling frequency of the signal at different points in the FFT and transform under the frequency spectrum, change the sampling frequency
kcsj_liwen
- 现代信号处理 一个序列为 ,使用FFT分析其频谱: 1) 使用不同宽度的矩形窗截短该序列为M点长度,取M分别为: a) M=20 b) M=40 c)M=160 ;观察不同长度的窗对谱分析结果的影响; 2)使用汉宁窗、哈明窗重做1) 3)对三种窗的结果进行理论分析及比较。并绘出相应的幅频特性曲线 -Modern signal processing a sequence, using FFT analysis of the spectrum: 1) the width of the
Untitled2
- 多普勒信号模型,多普勒信号快速傅立叶法分析频谱,FFT-Doppler signal model, the fast Fourier analysis of Doppler signal spectrum, the FFT
phasehaning
- 时移相位差校正法,通过时移,进行前后两次FFT分析,利用离散频谱对应峰值谱线的相位差以求出频率和相位校正量。-Phase difference correcting method by time-shifting. Make two FFT analysis before and after the time-shifting,and make use of the phase difference of the peak spectral lines to get frequency and
czt_transformer
- 该程序用CZT算法实现信号频率分析,并画出信号的波形图、FFT变换后的频谱图、CZT变换后的波形图-CZT transformer
spwmanalyse
- matlab用fft分析两种SPWM算法的优劣。实现时域数据的生成,频谱的比较。-matlab fft analysis of the pros and cons of the two SPWM algorithm. To achieve the generation of the time domain data, the comparison spectrum.
DFT-analysis-
- 利用DFT分析离散信号频谱的实验。利用FFT分析信号 x[k]=cos(3pik/8 +pi/4 ) 的频谱;确定DFT计算的参数,绘出其频谱;并进行理论值与计算值比较。-DFT analysis of discrete signal spectrum utilization experiments. Analysis using FFT signal x [k] = cos (3pik/8+ pi/4) of the spectrum determine the parameters of
signals-analysis
- 常用信号分析程序,包括FFT,画包络谱,频谱,自相关、互相关,倒频谱,功率谱-Common signal analysis program, including FFT, painting envelope spectrum, spectrum, auto-correlation, cross correlation, cepstrum, power spectrum
chirp-audiorecorder
- MATLAB中,chirp扫频产生声音信号,播放同时启动audiorecorder录音,之后对录音做FFT变换并分析其频谱-In MATLAB, chirp sweep signal generating sound, while playing audiorecorder start recording, then do the FFT for recording and analyzing the spectrum
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