code

说明：  本程序中含有服务器与客户端两个程序。服务器与客户端通过窗口进行通信。(This program contains two programs, server and client. The server communicates with the client through the window.)

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.

说明：  基于stm32f4的非接触式红外测温MLX90614c程序(Mlx90614c program of non-contact infrared temperature measurement based on stm32f4)

GlobalPlatform 核心功能 jar包(GlobalPlatform core jar package)

GRNN神经网络matlab实现.............(GRNN neural Network implement in matlab.)

说明：  stm pwm编程输出案例 keil c(stm32f103 pwm program plus wave output)

NFC测试标准ISO 23917，用于对NFC标准ISO 18092进行测试(NFC testing standards ISO 23917, ISO 18092 standards for testing NFC)

基于稀疏表达的一种简单样本采集方法，实现追踪(A simple sample collection method)

说明：  AP聚类的matlab实现，可以用于数据分类。(APCLUSTER Affinity Propagation Clustering)

说明：  The main goal of this step is to detect whether there is a mismatch of the thermal expansion coefficients, PCB mounting problems, weak solder joints, and IC package integrity