chapter18_S

该程序对ofdm系统中mmsnr的信道缩短算法的误码率性率进行了仿真，而且与没有信道缩短的只加cp的ofdm的系统进行了对比.程序包可以完整实现仿真，并得到理想的效果图，相信对做信道时域均衡的人会有所帮助！(ofdm mssnr TEQ equlization)

说明：  要：分析和研究了授权用户和认知用户共享频谱的一种算法的性能。 针对阴影效应或信道深衰落时，单用户频谱感知算法无法识别是频带未被 使用还是信道处于深衰落的情况，在频谱感知功率控制算法上进行了改进， 以克服这种算法的不足。改进后的算法能有效地控制认知用户的发射功率， 避免对授权用户产生有害的干扰。仿真结果表明改(To: analysis and research of the authorized users to share spectrum users and a cognitive performance of the algorithm. For the shadow effect or deep fading channel, the single-user spectrum sensing algorithm can not identify a band or a channel has not been used in the case of deep fading, the spectrum sensing power control algorithm has been improved on, to overcome the deficiencies of this method. The improved algorithm can effectively control the cognitive user' s transmit power, to avoid harmful interference with authorized users. Simulation results show that the change)

安照标准格式给出数据信息excel文档，可以处理数据并形成可视化模型，包含原始excel文档与m文件(Security is given according to standard format data excel document, can handle data and develop visual models, including the original excel file documents and m)

说明：  pdf file for learning matlab in persian

Range Kutta 2 method used for solving ordinary differential equation.

In control theory and stability theory, root locus analysis is a graphical method for examining how the roots of a system change with variation of a certain system parameter, commonly a gain within a feedback system. This is a technique used as a stability criterion in the field of classical control theory developed by Walter R. Evans which can determine stability of the system. The root locus plots the poles of the closed loop transfer function in the complex s-plane as a function of a gain parameter.

关于FFT的一个例子，Short time FFT with octave smooth by Matthes(An example of FFT on, Short time FFT with octave smoothby Matthes)

各种常用熵的matlab计算源代码，功能齐全，非常有用(A variety of commonly used entropy Matlab source code, fully functional, very useful)

对灰度图像进行拉普拉斯算子锐化，提取灰度图像的边缘。(Laplace operator sharpening, extract the edge of the gray image gray image.)

由MATLAB产生NRZ信号,并且以图形方式输出。(We produce NRZ signal using MATLAB,then output the signal by digure. )