QDPSK通信系统

GF（Q）域上的低密度校验（LDPC）码的译码及其在深空通信中的应用.PDF(GF (Q) domain LDPC (LDPC) code decoding and its application in deep-space communication. PDF)

基本的MATLAB调制解调程序集，包含BPSK、QPSK、QAM、GMSK等调制方式(Basic MATLAB modulation and demodulation program set, Including BPSK, QPSK, QAM, GMSK and other modulation methods.)

optical cummunication examples

说明：  仿真了MIMO通信系统的两种经典检测算法，迫零和最小均方误差，计算了误码率并绘制了误码率曲线(Two classical detection algorithms, zero forcing and minimum mean square error, are simulated in MIMO communication system. The BER is calculated and the BER curve is drawn)

winner+项目信道校正数据，大尺度、小尺度、视距、非视距信道参数校正测量数据(winner+ project channel calibration data, large-scale small scales, sight, NLOS channel parameter calibration measurement data)

说明：  一个基于python 的V2V仿真代码。(the code is about V2V communication simulation)

基于盲波束形成的波达方向──多普勒稳健估计(Based on Blind Beamforming DOA ─ ─ Doppler robust estimation)

OFDM-QPSK系统在不同信道（AWGN、AWGN+两径衰落信道、AWGN+三径衰落信道）下的接收端误码性能(three path fading, Gauss white noise)

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 )

说明：  标准接口1-5V转换成4-20mA程序，应用于标准传感器接入(Standard Interface 1-5V Converting 4-20mA Program for Standard Sensor Access)