调制识别源程序

这个是斗地主的游戏，还没有全部完成，希望多多指教-this is a game, has completed the hope that the exhibitions

说明：  SCMA编码解码的MATLAB实现及相关论文(MATLAB implementation of SCMA coding and decoding and related papers)

辛普森公式的python代码实例，计算微分积分运算(simpson rule is a very useful method to calculate integration and differentiation. The code is about how to implement it in python)

PCB设计指导参考及帮助资料，提供PCB的元器件的布局走线等问题-PCB design guidelines and reference information to help to provide PCB layout components such as the issue of alignment

说明：  经典书籍Reinforced concrete structures-Park，钢筋混凝土研究必读书籍，主要介绍钢筋混凝土本构，非线性等相关方面的知识(Classic books Reinforced concrete structures-Park, Reinforced Concrete must-read book describes the structure of reinforced concrete, nonlinear, and other related knowledge)

随机产生20个学生的成绩，统计各分数段人数。(Random generation 20 students scores, the number of each band statistics. Display score on the picture1 show that the statistical results in The picture1 display. )

说明：  此为回溯法求解迷宫问题的源代码，问题描述如下： 迷宫问题的求解是实验心理学的一个经典问题.，心理学家把一只老鼠从一个无顶盖的大盒子的入口赶进迷宫，迷宫中设置很多壁障，对前进方向形成了多处障碍，心理学家在迷宫的唯一出口放置了奶酪，吸引老鼠在迷宫中寻找通路以到达出口。设计回溯算法实现迷宫求解。(Retrospective method)

下部显示缩略图的点小图切换大图幻灯片代码，以前都说这是图片展示，反正就是那一类吧，JS内核的网页图片切换特效，纵向排列，大图下边显示三个小图，点击任意小图，切换上边大图片，以渐变淡入淡出的方式切换图片。

WLAN仿真－发送机 wlan No Comments 设置完系统参数后，开始产生发送数据。 1. 产生随机的发送bit（tx_bits），这里不考虑信道编码。 2. QAM映射 3. 将数据映射到不同载波，形成OFDM符号 4. 产生pilot，并将pilot插入OFDM符号中 5. 加入dc和guard子载波 6. 进行ifft，将频域信号变到时域，并加入循环前缀 7. 对信号进行overlap window 8. 在时域产生short preamble 9. 在时域产生long preamble 10. 将preamble和数据符号组成packet 11. 升采样 得到信道传输的数据Tx_signal_up 具体程序见附件 wlan_transmitter.m-WLAN Simulation- wlan No Comments transmitter system parameters set finished, the beginning to have to send data. 1. Have sent random bit (tx_bits), here does not consider channel coding. 2. QAM mapping 3. The data is mapped to a different carrier to form OFDM symbols 4. Have a pilot, and pilot inserted OFDM symbols 5. Adding dc and guard subcarriers 6. To carry out ifft, will change the frequency domain signal to time domain, and add cyclic prefix 7. the signals overlap window8. In the time domain have a short preamble9. In the time domain have a long preamble10. the preamble and data symbols packet11. or sampling re

说明：  用于比较计算两幅图像的均方误差值MSE大小(It is used to compare and calculate the MSE of two images)