NLM2

Matlab code for fiber bragg grating simulation.

本书提供一些matlab程序代码,能为初学者提供很好的例子(This book provide lots of code of matlab and good example for beginners.)

说明：  用MATLAB编写的qpsk调制解调程序并且方针通过(MATLAB prepared using QPSK modulation and demodulation process and approach adopted by)

xwch_test.m是主测试文件；biaoji.mat存放滤波器系数；xiangweicha.m用FFT计算相位差。 仿真框架为： 1.标记信号和双音信号续接作为发送信号； 2.对双音中一个频率分量的相位做偏移，再经过一个低通滤波器（引入线性相位，模拟收发不能同步测量现象）后，作为收到的信号； 3.用一个检测信号对收发信号进行相关运算； 4.画出收发信号以及相关处理后的信号。找出相关信号的那个尖点，从而推算出收发双音信号0相位点； 5. 输入0相位点位置，计算相对相位差。(xwch_test.m is the main test file biaoji.mat store filter coefficients xiangweicha.m calculated using FFT phase difference. Simulation framework: 1. Mark signals and then as a two-tone signal continued to send signals 2. On a two-tone frequency components of the phase shift to do, and then through a low pass filter (the introduction of linear phase, simulation can not simultaneously send and receive measuring the phenomenon), the as received signal 3. using a detection signal of the transceiver signal correlation operation 4. draw send and receive signals and related processed signal. Correlated signal of the cusp, which calculate the two-tone signal transceiver 0 phase point 5. Enter 0 phase point position, calculate the relative phase difference.)

CVSD语音压缩的算法和程序流程.量阶δ能够自动地随输入信号平均斜率的大小而连续变化,译码输出信号实现了对输入信号的理想逼近,最后在可编程逻辑器件(FPGA)中实现了CVSD调制功能。(CVSD voice compression algorithm and the program flow. Volume bands can automatically input signal with an average slope of the size of continuous change, decoder output signals to achieve the ideal input signal approximation, in the end programmable logic devices (FPGAs) to achieve the CVSD modulation functions.)

matlab的处理程序，对“hello”声音信号进行采样滤波后重放。(matlab handler, after hello voice signal is sampled filter replay.)

窗口鼠标同步器源码。可以同步多个窗口的鼠标操作(Window mouse synchronization source. You can synchronize multiple windows mouse)

本程序 是M进制PSK调制方式的仿真程序，是最基本的学习MPSK的材料(This procedure is the M-band PSK modulation of the simulation program, is the most basic learning materials MPSK)

FDTD matlab 程序 时域差分法 有界 (FDTD matlab program bounded difference time domain method)

辛普森二维积分的数值计算方法,运用c++程序进行编写 (numberical analysis)