第二题

数字通信中的16QAM映射，采用格雷码编码，包括星座图的显示，简单明了清晰，由此可以退出64,128QAM的matlab编码(Digital communication 16QAM mapping, the use of Gray coding, including the constellation display, simple clear, it can be out of the 64,128 QAM matlab code)

这是一个实现CS的QQ，并带有链接数据库的功能，主要功能有注册，群聊，私聊等(This is a realization of C S of the QQ, and with a link to a database functions, the main function of registration, group chat, private chat, etc.)

说明：  基于MUSIC算法，能够实现任意线阵的到达角估计，并分析信噪比等因素对估角精度的影响。(Based on music algorithm, DOA estimation of any linear array can be realized.)

LDPC coded OFDM system for power line communication in the presence of both AWGN and Impulsive noise..

QPSK SimulationGray CodingRayleigh Fading

SyncML核心解析代码，对开发SyncML 协议非常有用，SYNCML是OMA的手机同步协议。此代码可以在Windows和LINUX系统中使用.(SyncML core analysis code, SyncML agreement on the development of very useful SYNCML OMA is the phone synchronization protocols. This code in Windows and Linux systems.)

PT2262 PT2272 315M/433M 无线编码芯片中文资料，简单易用(The PT2262 PT2272315 Ms/433 M lead-in codes the chip Chinese data, simple easy use)

用Visual C++的API函数来打开、关闭串口和设置串口通讯速率等功能。(Visual C++ using the API function to open and close the serial port and set up features such as serial communication rate.)

说明：  基于ofdm的信道估计算法LS算法，与没有信道估计的情况作了对比。(Ofdm-based channel estimation algorithm LS algorithm, compared with no channel estimation.)

WINDOWS 应用程序（嵌入web浏览器），通过IC/NFC读卡器读取卡号,(IC/NFC card reader,can recognize card sn.)