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Description: 实现Shell，能处理命令
cd ：改变进程当前路径
pwd ：查看进程当前路径
pid：查看当前进程号（getpid()系统调用）
logout ：退出shell
ls [-l]
rm [-r]
mkdir, mv, cp-achieve Shell, can handle orders cd : the process of change current path pwd : View current path process pid : View the current process (getpid () system call) logout : withdraw from the shell ls [-l] rm [-r] mkdir, mv, cp
Platform: |
Size: 11264 |
Author: 叶黎 |
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Description: 基于均方误差参数比较OFDM系统中LS和MMSE两种自适应信道估计算法的性能，程序开头都有英文注释，可以直接运行的~个人认为写得比较好，跟大家一起分享~-Based on the Mean Square Error Comparison of OFDM system parameters LS and MMSE channel estimation of two adaptive algorithms, procedures are available in English at the beginning of the Notes, you can directly run the ~ personally think that is better written, with the U.S. to share ~
Platform: |
Size: 4096 |
Author: Panda |
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Description: 实现UNIX下的ls全部功能,同时添加了可以生成目录树.实现内容:1.如何读取目录的内容
2.目录排序
3.文件类型以及如何知道文件的类型
4.位操作及掩码的使用
5.用户与组ID数据库
6.UNIX文件系统的内部结构：i-节点和数据块
7.更改当前目录
8.输出颜色的改变和分栏
9.学习并实现ls命令各参数
10.解析命令行参数
-Ls under UNIX to achieve full functionality, while adding a directory tree can be generated. The realization of the contents: 1. How to read the contents of the directory 2. Directory sort 3. File types and how to know the type of document 4.-Bit operation and the use of mask 5. user and group ID database 6.UNIX the internal structure of the file system: i-node and data block 7. Change the current directory 8. output color change and column 9. learn and achieve ls command parameters 10. Analysis of the command line parameters
Platform: |
Size: 23552 |
Author: 周蜚语 |
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Description: 摘要:正交频分复用(OFDM)是第四代移动通信的核心技术。该文首先简要介绍了OFDM基本原理,重点研究了理想同步情
况下,保护时隙(CP)和不同的信道估计方法在高斯信道和多径瑞利衰落信道下对OFDM系统性能的影响。在给出OFDM系
统模型的基础上,用MATLAB语言实现了整个系统的计算机仿真并给出参考设计程序。最后给出在不同的信道条件下,保
护时隙、信道估计方法对OFDM系统误码率影响的比较曲线,得出了较理想的结论。
-O FDM is the key techno logy of 4G in the field of mobile comm unication.In this article O FDM
ba sic p rinc ip le is briefly in troduced.Then,the influence of CP and d iffe rent channe l e stim a tion on the system
pe rfo rm ance is emp ha tica lly analyzed respectively in Gauss and R ayle igh fading channe ls in the cond ition of ideal
synchronization.B e sides,based on the given system mode l O FDM system is compu te r sim u la ted w ith MA TLAB
language and the refe rentia l design p rocedure is given.Fina lly,the B ER cu rves of CP and channe l e stim ation a re
given and comp ared.The conclusion is sa tisfac to ry.
Platform: |
Size: 9216 |
Author: 海之魂 |
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Description: 在linux上编写的简单的shell,包括cd、ls、echo等命令-Shell code in linux
Platform: |
Size: 31744 |
Author: Cicy |
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