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語音信號是基於時間軸上的一維數位信號，在這裏主要是對語音信號進行頻域上的分析。在信號分析中，頻域往往包含了更多的資訊。對於頻域來說，大概有8種波形可以讓我們分析：矩形方波，鋸齒波，梯形波，臨界阻尼指數脈衝波形，三角波，餘旋波，余旋平方波，高斯波。對於各種波形，我們都可以用一種方法來分析，就是傅立葉變換：將時域的波形轉化到頻域來分析。(Voice signal is based on the timeline of one-dimensional digital signal, where mainly the speech signal in frequency domain analysis. In signal analysis, frequency domain often contains more information. For the frequency domain for about 8 allows us to analyze waveforms: rectangular square wave, sawtooth, trapezoidal wave, the critical damping index pulse, triangle wave, I spin wave, I spin square wave, Gaussian. For all waveforms, we can analyze in a way that is Fourier transform: the transformation of time domain waveform into the frequency domain to analyze)

Matlab files of chapter 3 kalman filtering 3 edition of grewal

信号与系统 信号与线性系统分析 matlab 编程研究(matlab signal and linear analysis)

代码详细实现了信号和图像的模极大值重构的 S.mallat 交替投影算法，该方法具有收敛速度快、精度高的特点。(The code depicts the modulus maxima recovery of signal and image based on the S.Mallat s alternate projection algorithm. The algorithm has fast convergence and high accuracy. )

在MATLAB的运行环境下 傅里叶变换提取信号系数 相角 幅值(Operating environment in MATLAB Fourier transform to extract the amplitude of the signal phase angle coefficient)

converter is suppressed according to CISPR 22 standard limits. The fundamental frequency component with higher order harmonics of 2 MHz resonant converter after the application of filter is at 33.18 dBµ V. The designed filter has attenuated the common mode conducted noise by 140 dBµ V.

The JPEG compression scheme is divided into the following stages: 1. Transform the image into an optimal color space. 2. Adjust Aspect Ratio 16:9 3. Digitization Scheme 4:2:0. 4. Apply a Discrete Cosine Transform (DCT) to blocks of pixels, thus removing redundant image data. 5. Quantize each block of DCT coefficients using weighting functions optimized for the human eye. 6. Encode the resulting coefficients (image data) using a Huffman variable word-length algorithm to remove redundancies in the coefficients. 7. Byte Stuffing. 8. Header JFIF 9. JPG Data Store

qpsk下在多径瑞丽衰落信道的传输特性，有效果很好的误码率和信噪比曲线(The transmission characteristics of multipath Rayleigh fading channel under QPSK are effective, with good BER and SNR curves.)

介绍如果使用matlab，是matlab入门者的必要学习资料(Introduction If you are using matlab, yes matlab beginners to learn the necessary information)

MATLAB 2007 小波分析理论 第十七章代码 帮助大家学习小波(MATLAB 2007 wavelet analysis theory Chapter XVII code to help you learn wavelet)