FDTD_TE-TM-C-D

脉冲编码调制(PCM)实现 编程实现PCM技术的三个过程：采样、量化与编码。 采样：低通连续信号采样，以 x=sin(200*t) m=x./(200*t) m=m.*m 为例说明低通采样定理，绘出信号时、频图形；带通连续信号采样，以x=sin(20*t) m=x./t 为例说明带通采样定理，绘出信号时、频图形。 量化：均匀量化，以幅度 的正弦信号为例实现为64级电平的均匀量化；非均匀量化，输入A律PCM编码器的正弦信号 ，采样序列为 ，将其进行PCM编码，给出编码器的输出码组序列 编码：以上述信号为例，实现A律的13折线近似法及国际标准PCM对数A律量化编码。(Pulse code modulation (PCM) to achieve PCM technology programming three processes: sampling, quantization and coding. Sample: low-pass continuous signal sampling to x = sin (200* t) m = x./(200* t) m = m.* m an example low-pass sampling theorem, draw the signal, frequency graphics bandpass sampling continuous signals to x = sin (20* t) m = x./t an example bandpass sampling theorem, draw the signal, frequency graph. Quantization: uniform quantization, in order to realize the magnitude of sinusoidal signal as an example for the 64 level uniform quantization non-uniform quantization, input A law PCM encoder sine signal, the sampling sequence, to be PCM encoded, the encoder is given The output code sequence Code: A Case Study of the signal to achieve the 13 A line approximation law and international standards on the number of A law PCM coding quantization.)

说明：  认知无线电里的能量检测，适合初学者，比较简单(Energy detection in cognitive radio, suitable for beginners, is relatively simple)

This is a program for extracting objects from an image. Written for vehicle number plate segmentation and extraction.

matlab编写的串口调试助手，matlab6.5下运行(write matlab serial debugging assistant, matlab6.5 run)

用matlab的LAPACE算子原理对图像进行了吧。是源图像更加的清晰。(Operators using matlab' s LAPACE principle of the image instead. Is the source image is more clear.)

FIR带通滤波器，用于分离混叠信号，适用于初学者(FIR band-pass filter, used to separate overlapping signals for beginners)

通过利用雷达脉冲宽度与信噪比关系公式，分析雷达在三咱不同检测目标距离下的信噪比与脉冲宽度关系。(Through the use of the radar pulse width of the signal-to-noise ratio relationship formula to analyze the radar in three different detection target distance we signal-to-noise ratio and pulse width relationship.)

本书介绍了MATLAB 基础，你将学习到如何绘制图象，求解代数方程及计算积分，也将学习到如何求解微分方程，求ODE 的数值解，使用特殊函数工作。(This book introduces the basic MATLAB, you will learn how to draw a picture, solving algebraic equations and calculate points, will also learn how to solve differential equations, numerical solutions of ODE s requirements, using a special function to work.)

说明：  此程序通过采样产生了一个非常标准的BPSK信号，是理解通信原理数字调制的好帮手(his procedure generated by sampling a very standard BPSK signal, digital modulation is to understand the principles of good communication assistant)

一个利用matlab画圆球的程序。圆球有立体，高光效果。(Draw a sphere using matlab program. Three-dimensional sphere, high-light effect.)