QAM

此代码为MIMO-OFDM源程序，包括PSK调制与解调，空时分组编译码，信道建模等部分(This code for MIMO-OFDM source, including PSK modulation and demodulation, space-time block coding and decoding, channel modeling and other parts)

航空航天通信技术一般采用模拟通信的频率调制和数字通信的移相键控调制方法。这有利于充分应用信道带宽和能源。频率调制是在一定程度上改变载波或副载波的频率来传输信息的调制方法。移相键控调制是利用载波或副载波的相位跳变来传输信息的调制方法。移相键控又分二相移相键控、四相移相键控和多相移相键控，其中以四相移相键控和八相移相键控调制方法的效率较高(Aerospace communications technology commonly used analog communication of frequency modulation and the digital communication phase shift keying modulation method. This is helpful for making full use of channel bandwidth and energy. Frequency modulation is changed to some extent carrier or subcarrier frequency to transmit information modulation method. Phase shift keying modulation is the use of carrier or subcarrier phase jump to transmit information modulation method. Phase shift keying and binary phase shift keying, four phase shift keying and multiple phase shift keying, of which four phase shift keying and eight phase shift keying modulation method of high efficiency )

MIMO DOA and DOD using ESPRIT and MUSIC

Windows系统下Modbus RTU协议从站，VB.net开发，可以直接支持研华系列采集模块的源代码(Windows systems, the Modbus RTU protocol slave, VB.net developers can directly support the of Advantech series acquisition module source code)

说明：  C++ Primer中文版及题解,一本学习C++的好书.(C Primer and that the Chinese version of Solutions, a learning C books.)

STM8S - for new member

网络传输控制信号，网络芯片是W5100,传输信号可为控制信号与开关信号，modbus通信协议。(PLC TO W5100,the led and i/o can traver bay w5100,use msp430f5438 as cpu,modbus an 485 to the sevlers,pc use to controle.)

4QAM(QPSK)的调制解调以及计算误码率，最后将结果输出至表格。适合新手参考(The modulation and demodulation of 4QAM (QPSK) and the calculation of bit error rate, and finally output the result to the form. Suitable for novice)

说明：  ? 了解3G移动通信网中关键技术CDMA的实现原理 ? 掌握matlab编程，实现CDMA原理仿真 ? 掌握matlab语言对于码分复用技术仿真的功能(Understanding the Implementation Principle of the Key Technologies of CDMA in 3G Mobile Communication Network Master the MATLAB programming and realize the simulation of the principle of CDMA Master the function of MATLAB language in simulation of code division multiplexing technology)

说明：  c语言实现的lwm2m协议，程序是可以直接编译通过的，主程序在src的lwm2mclient.c中(The lwm2m protocol implemented by C language can be compiled and passed directly. The main program is in lwm2mclient.c of src.)