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fsk modulation Frequency shift keying (FSK) is the most common form of digital modulation in the high-frequency radio spectrum, and has important applications in telephone circuits. This article provides a general tutorial on FSK in its many forms. Both modulation and demodulation schemes will be discussed

（本文是在论坛已有一篇文章《SIRP法相干相关K分布雷达杂波的建模与仿真》的基础上修改而来，在此首先感谢这篇文章的作者给予我的帮助。之所以完成这篇文章，有三个方面的原因：一是对原文章和仿真程序代码明显存在一些不一致的地方，因此，我这里对每个公式进行检验（后来证明文章的公式正确无误，但所给的仿真代码存在问题），二是对自己近4天工作的一个总结，以便以后学习可以参考；三是可以放在网上给初学者一些参考，以便后来者不再走自己曾经走过的弯路。文章的一些文字是在匆忙间完成，只求能表达所述意思，没有详细斟酌，海涵：-(This article is an article in the forum have been "SIRP law related coherent K distributed clutter radar modeling and simulation" on modified from the foundation, in this first of all thank the authors of this article has given me help. The reason why the completion of this articles, there are three reasons: First, the original article and simulation program code, there are some obvious inconsistencies, so I here the formula for each test (later proven formula article is correct, but give the simulation code problem exist), near two of their four days of a summary of the job in order to study the future reference three on-line can give some reference for beginners in order to go was no longer the tortuous path they have traversed. arti

九寨运业车辆保险管理系统。 对车辆信息以及保险进行管理查询和报表的操作。-Jiuzhai transport industry, vehicle insurance management system. For vehicle information and insurance queries and reports to manage operations.

一个双人五子棋，支持人机对战，界面美观，电脑ai算法比较好，工程文件已转，vc7和vc6都可直接打开编译-a double 331, support human-machine players, beautiful interface, computer ai better algorithm, the document has been changed, and vc7 and vc6 compiler can directly open

工业控制中的一种常用控制算法PID运算-industrial control of a common computing PID control algorithm

在遥感应用领域，植被指数已广泛用来定性和定量评价植被覆盖及其生长活力。由于植被光谱表现为植被、土壤亮度、环境影响、阴影、土壤颜色和湿度复杂混合反应，而且受大气空间―时相变化的影响，因此植被指数没有一个普遍的值，其研究经常表明不同的结果。-in the field of remote sensing applications, vegetation index has been widely used for the qualitative and quantitative evaluation of the growth of vegetation cover and its vitality. As the spectral performance of the vegetation cover, soil brightness, environmental impact, shadow, color and soil moisture complex mixed reaction and by the atmospheric space-phase change, vegetation index therefore not a universal value, its regular show different results.

电影ASP文件，可在线管理与浏览电影。无须解压密码-film ASP documents, and browsing online film management. No need to extract passwords

Linux在上个世纪就已经有了很多种图形用户界面(GUI)，所以当你安装一个流行的Linux以后，上 手几乎和Windows同样轻松。不过我们还是会介绍一些shell命令并建议多使用shell。这样可以给以后阅 读编译脚本、自己建立交叉编译环境等工作带来便利。在图形用户界面打开shell 只需点击菜单中的终端 或者点击运行，输入一个shell的名称并回车，比如bash。-Linux in the last century have many graphical user interface (GUI) So when you install a popular Linux, the unfamiliar, and Windows almost equally relaxed. However, we will introduce some shell commands and recommended more use of the shell. This can give after reading the script compiler and create cross-compiler environment, facilitate the work. The graphical user interface shell opened by clicking the menu or click on the terminal operation, the importation of a shell and enter the name, such as bash.

220KV电压等级变电站微机操作继电器装置的二次回路原理程序-220KV substation voltage relay device microcomputer operating principle of the procedure secondary circuit

进程之间以时间片为单位，进行唤醒，调用，当时间片到后，进程就进入等待队列，而且是按优先级进行调用。-processes with time-unit, awakened, called when time-to the post, the process would enter the waiting queue, but is carried out according to priority calls.