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用matlab实现的离散余弦编码，主要通过离散余弦编码的原理，用matlab实现的源代码。(Using matlab realize the discrete cosine coding, discrete cosine, mainly through the principle of encoding, using matlab realize the source code.)

将音乐信号fm调制并解调，光看波形和频谱(Fm music signal modulation and demodulation, optical waveform and spectrum look)

QPSK的基本结构原理与噪声下的SNR,这是最基本的方式(qpsk，basic construction and noise)

PID控制 PI控制 PD控制 matlab程序 初级入门(PID control PI control PD control matlab program entry-)

说明：  针对matlab的simulink仿真的知识，对有这方面需要的网友请下载。(Simulink for matlab simulation of the knowledge of a need, please download the User.)

LU分解，LU法解方程，matlab语言(LU decomposition, LU method for solving equations, matlab language )

This is a simple program solving a math problem of linear system.

说明：  基于Matlab简单的语音识别系统，能够通过样本训练得到最后结果。(Simple speech recognition system based on Matlab can get the final result through sample training.)

说明：  基于ISO532A计算响度；播放声音；倍频程声压级计算(Calculation of loudness, playing sound, octave sound pressure level based on iso532a)

the code of the book come form the book of marlix laboratory with the book of singal (the code of the book come form the book of marlix laboratory with the book of singal)