M_Rife

ANALYSIS OF RECOVERY FROM COMMUTATION FAILURES IN AN HVDC INVERTER CONNECTED TO A WEAK RECEIVING AC SYSTEM

说明：  这是一个基于OPtisystem下的对于16QAM信号的仿真，可用于通信工程作业的一般仿真系统。(This is a simulation system of 16QAM signal based on OPtisystem, which can be used in general simulation system of communication engineering operation)

此程序用matlab编码，可以生成随机骨料，适用于有限元分析。。。。(This program is progressed by matlab, which can generate the concretebone. It can be used in finte element analysis.)

Winner+通信信道模型文件，视距通信概率，非视距通信概率，路损模型等(Winner+ communication channel model file, line of sight communication probability, the probability of non-line communication, road loss models)

用51单片机完美地解决凝露现象。防止元件老化(The dew phenomenon can be perfectly solved by 51 single chip computer. Preventing component ageing)

this code simulate pure aloha .

直扩码分多址DS-CDMA是利用高速的WALSH正交码序列作为地址码，与多用户信息数据相乘得到信息数据的直接扩频信号，再经过BPSK调制后发送出去，经过AWGN无线信道的传输后，在接收端与本地产生的地址码进行相关检测，从中将地址码与本地码一致的用户数据选出，把不一致的用户数据删除。(DS-CDMA DS-CDMA is the use of high-speed WALSH orthogonal code sequences as address code, with multi-user information data has been multiplied by the direct spread spectrum data information signal, and then after a BPSK modulated sent through AWGN channel after transmission, at the receiving end with the locally generated address code associated Detect, which will address code with local codes consistent user data elected to delete user data inconsistencies.)

说明：  U盘读写模块，实现电脑与U盘自动连接，发送，传输数据(U-reader module, computerization and U disk automatically, sending, transmission of data)

利用wifi信号进行精准的定位，mit代码(locolizing using wifi)

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)