HW1_4

自己写的广义LDPC的程序，包括编译码，其中最重要的是一码算法，用的是chase算法，有很好的性能，希望可以跟大家交流改进(Generalized LDPC write procedures, including the encoding and decoding, most important of which is a code algorithm, using a chase algorithm has good performance, hoping to improve communication with everyone)

多项式提取一个数组或是曲线的趋势项 得到一个多项式表达式 以及拟合的新数组(Extract an array of polynomial curve or a polynomial trend item to get a new array of expressions and fitting)

光学工程7大几何相差模拟以及仿真实例操作，有限元和无限元仿真(7 large geometry difference between optical engineering simulation and operation simulation, finite element and infinite element simulation)

matlab 基本的图像处理知识，可以简单的了解MATLAB的图像处理(MATLAB basic image processing knowledge)

MATLAB CODE FOR OFDM IEEE PAPERS PDF

本文件包含常用的MATLAB高阶累积量函数，是一个统计学常用的工具箱。(This document contains frequently used MATLAB higher-order cumulant function, is a commonly used statistical toolbox)

此代码为《雷达系统分析与设计》的书中的代码(This code is " radar system analysis and design," the code book)

雷达通信一体化系统，针对非波动目标以及波动目标的雷达探测性能分析。(he dual-frequency MPPSK-MODEM platform is a flexible one. When ranging accuracy request is low or platform is particularly affected by power limitations, the platform would perform both data transmission and range measurement with single frequency modes. In this paper, the ranging resolution of MPPSK pulse waveforms with the match filter and impacting filter processing method are discussed, respectively. Also, the selection of MPPSK modulation parameters for ranging is considered. In particular, requirements that allow for employing such special parameter values for range measurements with high accuracy and high range are investigated. Moreover, high repetition frequency (HRF) bi-phase code MPPSK pulse train base on m sequence are presented, the ranging accuracy of the proposed signal with the match filter processing method is deduced. In addition to theoretical considerations, the paper presents system simulations and measurement results of single-frequency MPPSK intergated systems, d)

设计一个采用 2ASK（OOK）调制的数字通信系统，给定载波频率为码元速率的2倍，产生二进制随机数据，并仿真其对应的 2ASK 调制波形，分析其频谱。所产生的调制波形加入不同信噪比的白噪声，再观察其波形和频谱变化。(Design of a use 2ASK (OOK) modulated digital communication system, a given carrier frequency is twice the symbol rate, to generate a random binary data, and simulate its corresponding 2ASK modulation waveform, the spectrum analysis. Modulated waveform generated by white noise with different noise ratio, and then observe its waveform and spectrum changes.)

超效率DEA剔除本身样本的MATLAB求解，只需更改输入输出，并能直接保存结果为Excel文件(Super Efficiency DEA reject MATLAB sample itself to solve, simply change the input and output, and can save the result as an Excel file directly)