MATLAB

This is a reference implementation for the synthetic experiments on lower linear envelope inference and learning described in "Max-margin Learning for Lower Linear Envelope Potentials in Binary Markov Random Fields", Stephen Gould, ICML 2011.

All matlab codes for digital communication in matlab simulink for students. MATLAB_Simulink_for_Digital_Communication_program_for_student

利用MATLAB对信号进行FFT处理，观察幅频响应和相频响应(FFT using MATLAB for signal processing, observed amplitude frequency response and phase frequency response)

实现瑞利衰落的仿真，利用改进的jakes模型来产生单径的平坦型瑞利衰落信道。(Realize the simulation of Rayleigh fading, improved jakes model is used to produce a single type of flat Rayleigh fading channel.)

系统辨识基于梯度校正的参数辨识方法，其中包括随机牛顿法，确定性梯度下降法(System identification based on the gradient correction parameter identification methods, including random Newton' s method, deterministic gradient descent)

包括两个简单卡尔曼滤波例子和一个最小二乘法例程(Filtering and least squares)

用kmeans初始化em算法，并用高斯回归进行拟合，用于图想的聚类(Kmeans initialization using EM algorithm, and the use of Gauss regression fitting, used to map the clusterin)

四轴飞行器制作总结，包括四轴制作过程中马达、电调的选择，以及相关代码。(Four aircraft production summary, including the motor axis in the production process, the choice of power transfer, and the relevant code.)

说明：  利用MATLAB强大的图形处理功能，符号运算功能和数值计算功能，实现连续时间非周期信号频域分析的仿真波形； 1、用MATLAB实现典型非周期信号的频域分析； 2、用MATLAB实现信号的幅度调制； 3、用MATLAB实现信号傅立叶变换性质的仿真波形； (The use of MATLAB powerful graphics processing capabilities, symbolic computing and numerical computing capabilities to achieve continuous-time non-periodic signal frequency domain analysis of the simulation waveform 1, using MATLAB to achieve a typical non-periodic signal frequency domain analysis 2, using MATLAB to achieve signal amplitude modulation 3, using MATLAB for signal Fourier transform nature of the simulation waveform )

OFDM,实际上OFDM是MCM Multi-CarrierModulation，多载波调制的一种。其主要思想是：将信道分成若干正交子信道，将高速数据信号转换成并行的低速子数据流，调制到在每个子信道上进行传输。正交信号可以通过在接收端采用相关技术来分开，这样可以减少子信道之间的相互干扰 ICI 。每个子信道上的信号带宽小于信道的相关带宽，因此每个子信道上的可以看成平坦性衰落，从而可以消除符号间干扰。而且由于每个子信道的带宽仅仅是原信道带宽的一小部分，信道均衡变得相对容易。在向B3G/4G演进的过程中，OFDM是关键的技术之一，可以结合分集，时空编码，干扰和信道间干扰抑制以及智能天线技术，最大限度的提高了系统性能。(OFDM)