multiple_pathanddopple

In recent years, the number of portable mobile terminal users is increasing with improvement of the wireless communication environment. In addition, mobile multimedia services also bring the increase of wireless traffic and lack of spectrum resources. As a technique for efficient spectrum use, spectrum sharing receives much attention. It dynamically assigns a spectrum channel from a larger area network such as WiMAX to smaller area networks such as WiFi-based wireless LANs and achieves to increase the total wireless communication capacity of this area. In a case where all providers are cooperative, the spectrum sharing can be realized easily and improve user throughput in average. In another case where providers are not cooperative, some spectrum trading methods based on auction theory had been proposed.

QPSK通过瑞利信道的MATLAB仿真,Alamouti空时码在不同调制方式下的性能仿真(MATLAB Simulation of QPSK over Rayleigh Channel performance Simulation of QPSK Space-Time Code under different Modulation modes)

OPC通讯源代码C++编写，第一次发文，从别处下载而来(OPC communication source code is written in C++, for the first time issued a document downloaded elsewhere)

很好的算法，很好的程序，能够实现最小信道的确定(It s a good code ,and it s a good program ,it can make something true )

LDPC校验矩阵生成、高斯消去法编码、BP译码程序，可以作为自己编写LDPC编译码程序的参考。因为matlab代码效率不高，所以这个程序仿真起来比较慢.(LDPC check matrix generation, Gaussian elimination coding, BP decoding procedure can be used as its own procedures for the preparation of LDPC codec reference. Because matlab code efficiency is not high, so this process is relatively slow simulation together.)

频谱感知，生成采样频率，进行能量检测，采用matlab算法(Spectrum sensing, generation of sampling frequency, energy detection, using matlab algorithm)

modbus rtu 校验vb源码，对VB学习者很有帮助(modbus rtu checksum vb source code, useful for VB learner)

Slide for beginning with OPNET

java源码程序关于matlab学习(procedures on Matlab learning)

Symotion是一种用于运动控制的实时工业总线，基于10/100M以太网物理层，应用层使用canopen及精简协议。可应用于运动控制器，电机驱动器，PLC，编码器光栅尺与其它工业现场执行器互连。symotion总线提供安全、开放、低成本及高性能应用。(Symotion is a synchronous real-time FieldBus for Motion control . Build on a 10/100M Ethernet physical layer , and Canopen or reduced protocol Layer. interconnect between motion controllers, Motor drives, I/O modules, encoder devices and other actuators. Symotion provides Safety , Open , low cost and high performance in all applications.)