Beamforming

This is a JPEG encoding & decoding program of still image. It does not use level shifting. Discrete Cosine transform (DCT) is performed both by classical & Chen s Flowgraph methods. Predefined JPEG quantization array & zigzag order are used here. RUN - LEVEL coding is used instead of Huffman coding. Compression ratio is compared for each DCT method. Effect of coarse and fine quantization is also examined. The execution time of 2 DCT methods is also checked. In addition, most energatic DCT coefficients are also applied to examine the effect in MatLab 7.4.0 R2007a. Input is 9 gray scale pictures & output is 9*9=81 pictures to compare. Blocking effect is obvious. (This is a JPEG encoding & decoding program of still image. It does not use level shifting. Discrete Cosine transform (DCT) is performed both by classical & Chen s Flowgraph methods. Predefined JPEG quantization array & zigzag order are used here. RUN - LEVEL coding is used instead of Huffman coding. Compression ratio is compared for each DCT method. Effect of coarse and fine quantization is also examined. The execution time of 2 DCT methods is also checked. In addition, most energatic DCT coefficients are also applied to examine the effect in MatLab 7.4.0 R2007a. Input is 9 gray scale pictures & output is 9*9=81 pictures to compare. Blocking effect is obvious. )

产生QPSK信号，根据仿真的数据估计差错概率(Produce QPSK signal and estimate the data according to the error probability)

说明：  数字信号调制中的ASK,PSK,FSK的matlab仿真程序，包含了调制与解调过程(Digital signal modulation of ASK, PSK, FSK the matlab simulation program, including the modulation and demodulation process)

说明：  瞬时相位法线性调频信号瞬时频率提取技术研究matlab程序并附有一篇找到的论文(a matlab program Instantaneous Phase Linear FM signal instantaneous frequency extraction technique together with a paper)

有一个3阶对象，要求使用继电自整定方法对其实施自适应PID控制。 要求： 1、选择采样时间0.1s，把对象离散化。 2、加继电（开关）控制，测量对象的Tc,Kc。 3、利用ZIEGLER-NICHOLS 公式表，确定PID参数。 4、实现闭环控制。 5、根据调节效果，修正PID参数。 (A 3-order object, requires the use of relay self-tuning PID control methods on the implementation of adaptive. Requirements: 1, select the sampling time 0.1s, the discrete objects. 2, plus relay (switch) control, measurement object Tc, Kc. 3, using ZIEGLER-NICHOLS formula table, determine the PID parameters. 4, closed loop. 5, according to moderating effect, the amendment PID parameters.)

对于matlab初学者而言，适合的程序设计教程(Matlab for beginners, suitable programming tutorial)

CMA_4QM算法，本人自己手写的关于CMA的算法，结构很清晰，有注释说明，对初学者有很大的参考价值(CMA_4QM algorithm, my own handwriting on the CMA algorithm, the structure is very clear, there are explanatory notes for a great reference for beginners)

基于压缩感知的匹配基追踪算法的matlab实现(Based on compressed sensing based tracking algorithm matlab matching)

Used to simulate fourth-folder dendrite growth

this code describes image encryption process of color image using Matlab