experimentone

DTMF(双音多频)是用两个特定的单音频组合信号来代表数字信号的一种编码技术。两个单音的频率不同，代表的数字或实现的功能也不同。可采用8种频率代表电话机上的16个按键，10个数字键0~9和6个功能键*、#、A、B、C、D。具体的频率组合见参考书。要求： (1) 根据键盘输入的符号，利用MATLAB产生对应的DTMF信号；(2) 分别利用FFT算法和Goertzel算法计算该DTMF信号的频谱并画出频谱图；(3) 根据频谱图确定DTMF信号所代表的符号是否和输入的符号一致。 (DTMF (Dual Tone Multi-Frequency) is a single with two specific combination of audio signals to represent a kind of digital signal coding techniques. Two monosyllabic different frequency, on behalf of the numbers, or the realization of the functions are also different. Eight kinds of frequency of use on behalf of telephone on the 16 keys, 10 numeric keys 0 ~ 9 and 6 function keys*,#, A, B, C, D. The frequency of specific composition of reference books. Requirements: (1) According to the keyboard input of symbols, the use of MATLAB have a corresponding DTMF signal (2), respectively, using FFT algorithm and the Goertzel algorithm DTMF signal spectrum and frequency spectrum draw (3) According to DTMF signal frequency spectrum to determine represented by symbols and input symbols unanimously.)

伯肃叶流动用格子boltzmann方法去扩展新的研究方法(Peter Stephen leaf lattice boltzmann method flow go with the expansion of new research methods)

说明：  几乎所有关于数字相机仿真的英文论文，很有科研价值( English paper about Simulation of digital camera。Great scientific value。)

For the 3d implementations, the source files for the in-core version are in the directory fdct3d

boc调制及绘制功率谱,给出了boc调制程序及图形的绘制(boc modulation and draw power spectrum, the the boc modulation procedures and graphics rendering)

pi/4-QPSK的恒模盲均衡matlab代码，并附有说明(pi/4-QPSK constant modulus blind equalization matlab code together with explanation)

QR分解SMI算法的目的正是要避免直接来解线性方程，而是将自相关矩阵分解，并利用Givens旋转实现数据矩阵的QR分解，最终将权矢量的求解问题转化为三角线性方程组的求解问题。(QR decomposition SMI algorithm, whose objective it is to avoid directly to solution of linear equations, but will auto-correlation matrix decomposition, and the use of Givens rotation implementation of the QR decomposition of data matrix, the weight vector will eventually solve the problem into a triangular system of linear equations solving the problem.)

CHOLMOD: a sparse Cholesky factorization package

有关PCM编码的，并有误码率分析，无密码(The PCM coding, no password)

实现MATLAB环境中，对MP3格式的音频文件的读写操作(reading from or writing to a mp3 audio file based-on matlab)