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单用户多载波时频域联合cdma扩频的仿真，使用类编程。包含发送，信道，接收3个类。有联合扩频，调制，FFT变换，高斯信道和瑞利，解调，解扩，统计误码率等功能，减小仿真点数可使程序运行更快。,Single-user multi-carrier cdma joint time-frequency domain spread spectrum simulation, the use of programming. Send contain, channel, receiving three categ
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自己写的一个基于eMbedded Visual C++的音频采集以及频谱分析小程序。
包括录音，回放，时域波形，频谱图-Based on the eMbedded Visual C++ of the audio spectrum analysis procedures. Including recording, playback, time-domain waveform, frequency spectrum
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多用户多载波时频域cdma扩频的仿真，使用类编程。包含发送，信道，接收3个类。有选择用户数，联合扩频，调制，FFT变换，高斯信道和瑞利，解调，解扩，统计误码率等功能，减小仿真点数可使程序运行更快。-Multi-user multi-carrier spread spectrum cdma time-frequency domain of the simulation, the use of programming. Send contain, channel, receiving three c
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时频分析的软件界面，vc开发，要编写界面的xdjm可以参考一下。-Time-frequency analysis of the software interface, vc development, to be prepared xdjm interface reference.
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模拟单边带调幅及解调
基本要求：
产生300 ~ 3400Hz的调制信号，画出时域波形及频谱；
产生载波信号，频率自定义，画出时域波形及频谱；
产生加性高斯白噪声，画出时域波形及频谱；
单边调幅，画出叠加噪声后的调制信号和已调信号的波形及频谱；
设计滤波器，画出幅频响应图；
解调，画出解调后的信号时域波形及频谱，并对比分析。
-Simulation of s
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对信号进行EMD分解并绘制希尔伯特时频谱的程序，自己做毕业设计编写的- EMD decomposition of signals and time-frequency spectrum of the Hilbert mapping procedures, the design of their own graduates prepared
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用mega8 做的音频分析，能够实时显示mic输入的音频信号波形和频谱。-Mega8 to do with audio analysis to real-time display mic input audio signal waveform and frequency spectrum.
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能够把输入信号分解为多个IMF分量，并进行Hilbert变换，求得信号的时频分布谱图。-Be able to input signal is decomposed into several IMF components and carry out Hilbert transform, time-frequency distribution obtained spectrum.
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这个例子阐明了发生在时变系统中的频谱扩展，系统的带通输入时在某个频率上的音频信号-This example illustrates the system occurred in the time-varying spectrum expansion of the system' s band-pass input on a frequency of audio signal
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信号频谱分析
1. 观测已知方波信号、正弦波信号的频谱
分析频率为4KHz、8KHz的占空比为50 的方波信号、正弦波信号的频谱。记录所得频谱图。
观测实时模拟信号（语音）的频谱
用音频设备采集一段语音，将语音存为.wav格式。对wav文件作分段傅里叶变换分析。语音是分音节的，应把它分段分析，而且实际运用中的数字信号处理的FFT的点数是有限的，一般只能达到千点。用傅里叶反变换IFFT，从频域恢复信号。画出频谱图和语音波形图-Signal spectrum analysis 1.
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Frequency Hopping Spread Spectrum
这是一个跳频信号的时频分析程序-Frequency Hopping Spread Spectrum is a frequency-hopping time-frequency analysis program
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设计产生一个连续信号，包含低频，中频，高频分量，对其进行采样，进行频谱分析，使用矩形窗设计不同特性的数字滤波器对信号进行滤波处理，分析所设计滤波器(画出了频率特性曲线)，并对信号进行滤波，画出滤波后信号的时域波形和频谱，并对滤波前后的信号进行对比，同时设计出了一个友好的人机交互界面。-Designed to produce a continuous signal, including low frequency, medium frequency, high frequency componen
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HHT(hilbert Huang-transfrom)可以实现同时对信号的时频分析，得到信号的Hilbert时频谱和能量谱，-HHT (hilbert Huang-transfrom) can achieve the same time, the time-frequency analysis, when the signal spectrum and Hilbert energy spectrum
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基于 MATLAB 的语音信号分析与处理的课程设计.录制一段自己的语音信号，并对录制的信号进行采样；画出采样后语音信号的时域波形和频谱图；给定滤波器的性能指标，采用窗函数法或双线性变换设计滤波器，并画出滤波器的频率响应；然后用自己设计的滤波器对采集的语音信号进行滤波，画出滤波后信号的时域波形和频谱，并对滤波前后的信号进行对比，分析信号的变化；回放语音信号-MATLAB-based voice signal analysis and processing of the curriculum. Re
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Based on the spectrum of the vuvuzela sound, this denoising technique simply computes an antenuation map in the time-frequency domain. Then, the audio signal is restored by computing the inverse STFT. See [1] or [2] for more detail about the algorith
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To fully utilize the character of the bioradar echo signal, autocorrelation analysis, spectral estimation methods and time-frequency analysis are presented in this paper. These methods are employed to deal with no one, single people and multi-people
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计算非平稳随机信号的WVD时频谱的matlab程序-Calculation of non-stationary random signal WVD time-frequency spectrum of the matlab program
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希尔伯特黄变换中三维的时频谱的绘制程序，效果很不错！-A 3D Hibert-Huang Transform time-frequency spectrum
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Shows the frequency spectrum and shows all occuring doh notes in the time domain.
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高精度时频变换方法及应用，有效提高了时频变换的稳定性和精度(To inversely transform matching pursuit time-frequency
distribution into time signal, a new method for matching
pursuit time-frequency representation was proposed by
weighting the waveform of the Morlet wavelet by its
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