cognitive radio

说明：  通过C++语言实现了OFDM系统的仿真，包裹调制、子载波映射、循环前缀、频域时域映射，解调等等，代码简单易懂(The simulation of OFDM system is realized by C + +, including package modulation, subcarrier mapping, cyclic prefix, frequency domain time domain mapping, demodulation and so on. The code is simple and easy to understand)

最简单的串口收发程序，全部用VC++实现，对初学VC串口通信的朋友有很大帮助，提供全部源代码，提供串口类的.CPP和.H文件。(The simplest procedure serial transceivers, all with VC++ implementation of serial communication beginner VC friend of great help, providing all the source code, to provide serial port class. CPP and. H files.)

说明：  D2D通信实现资源分配算法的有关代码，用于提高下一代蜂窝网络中的频谱利用率的解决方案是设备到设备D2D(Device to Device）通信。(D2D communication implements code related to resource allocation algorithms. The solution for improving spectrum utilization in next generation cellular networks is device-to-device D2D (device-to-device) communication.)

正交频分复用中当调制方式采用QDPSK时的解调程序(Orthogonal frequency division multiplexing modulation when used in QDPSK procedures at the time of demodulation)

这是整套的ldpc-ofdm仿真模拟代码，可以运行的，输出的是误码率图像(This is the whole set of ldpc-ofdm simulation code, you can run the output image is the bit error rate)

Modbus4J源代码，方便大家查看具体的协议内容(Modbus4J.rar is a file that describes how control the PLC by Java language)

MIMO systems with efficient sum rate analysis

Matlab仿真，ＭＩＭＯ信道下直视情况下信道容量的仿真及结果！(Matlab simulation, the simulation results of channel capacity in the case is open MIMO channel!)

说明：  数据通信的课程设计，用于实现AMI码等等在数据通信中实用的编码。(Data communication curriculum design, code, etc. used to implement AMI useful in data communications code.)

for entropy H = entropy(S) this command will evaluate the entropy of S, S should be row matrix H = entropy([X Y Z]) this command will find the joint entropy for the 3 variables H = entropy([X,Y],[Z,W]) this will find H(X,Y/Z,W).. you can use it for any combination of joint entropies Please validate this function before using it