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本文首先概述了OFDM 的原理、特征和关键技术，介绍了系统需要的几种同步。然后就同步误差对系统性能的影响进行了简单的分析，表明定时偏差和采样频率偏差将会引入码间干扰，载波频率偏差导致载波间干扰的发生。因此，在OFDM系统接收机中定时的确定、载波频率偏差和采样频率偏差的纠正是信号恢复的关键。之后对OFDM系统同步的几种实现方法进行了介绍，分析了各同步方法的性能。-The paper first outlines the principles of OFDM, features and key technologies, the system needs to introduce several synchronization. Synchronization error and then the impact on system performance for a simple analysis, show that the timing deviation and the sampling frequency deviation will introduce inter-symbol interference, the carrier frequency deviation led to the occurrence of ICI. Therefore, in OFDM system receiver to determine the timing, carrier frequency offset and sampling frequency offset correction signal to restore the key. After the OFDM system to achieve synchronization of several methods of introduction, an analysis of the performance of the synchronization method.

Embedded vc++下开发的可编辑地图程序-developed under the map editing procedures

模拟电源电路设计资料 希望能帮助大家-Analog power circuit design information to help you

MATLAB实现的伽罗华域乘法，在AES的安全算法中应用到-MATLAB implementation Galois field multiplication, in the AES security algorithm applied to the

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人事管理系统，基于VC++开发，具有一定的实用性。对于学习vc 的朋友也很有帮助-Personnel Management System, based on the VC++ Development, has a certain practicality. Vc friends for learning was very helpful

Java IO文件操作类与复制文件实例，有关文本编辑、FileWriter文件写入、FileReade文件读娶DataStream文件数据流、BufferedReader文件暂存器、FileViewer文件浏览器、复制文件Copy等方面的操作要领，仅供学习参考。

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编程查找指定目录下所有EXE文件，并将其全路径存入Result.txt中，要求用递归- The programming search assigns under the table of contents all EXE document, and stores its full path in Result.txt, the request uses the recursion

这是一个VHDL（硬件描述语言）的编译器，更确切说是一个解释器，输入是VHDL语言，输出是经过提到后的符号表，也就是将VHDL中的重要变量比如输入输出变量和DFF等保存下来。-This is a VHDL (hardware description language) compiler, more precise explanation is a device that is VHDL input, output was mentioned after the symbol table to VHDL is the important variables such as input and output variables and other DFF preserved.