venkat

The spectrum sensing problem has gained new aspects with cognitive radio and opportunistic spectrum access concepts. It is one of the most challenging issues in cognitive radio systems. In this paper, a survey of spectrum sensing methodologies for cognitive radio is presented. Various aspects of spectrum sensing problem are studied from a cognitive radio perspective and multi-dimensional spectrum sensing concept is introduced. Challenges associated with spectrum sensing are given and enabling spectrum sensing methods are reviewed. The paper explains the cooperative sensing concept and its various forms. External sensing algorithms and other alternative sensing methods are discussed. Furthermore, statistical modeling of network traffic and utilization of these models for prediction of primary user behavior is studied. Finally, sensing features of some current wireless standards are given.

该实验描述的接收机行为。仿真发射信号在AWGN信道的传播及在接收端的检测。(The experiment described in the receiver behavior. Simulation transmitted signal in AWGN channel propagation and detection at the receiving end.)

说明：  该文件包括几篇比较关于LDPC编码核心的基础读物，还有关于LDPC开发的MATLAB仿真库和运用该库所进行的一些仿真源码(The documents include a few more LDPC coding on the basis of the core reading, also on the development of the LDPC MATLAB simulation library and use the library for the simulation source code)

本部分为一个热物体的传热模拟程序，把物体进行分割为单元，依次计算传热(This section is a hot object heat transfer simulation program, the objects divided into units, followed by calculation of heat transfer)

基于Mcrochip的PMSM滑模观测器FOC控制(FOC PMSM control sliding mode observer)

去卷积工具箱，Deconvolution tool box。Deconvolution tool box(Deconvolution tool box)

《空间谱估计原理与算法》多重信号分类法估计matlab源代码(" Space Spectrum Estimation Principle and Algorithm" multiple signal classification method estimates matlab source code)

典型飞机目标的RCS仿真，内容丰富，分析较为仔细(Typical aircraft target RCS simulation, rich in content, more careful analysis)

matlab实现的线性调频信号的小波变换，可实现信号的时频分析，有很清晰的二维色图(matlab achieve chirp signal wavelet transform, time-frequency signal analysis can be achieved, there is a very clear-dimensional color map)

对OFDM的载波频偏进行估计和补偿，采用ML最大似然估计算法，有不同频偏值和不同信噪比的仿真结果图。(For OFDM carrier frequency offset estimation and compensation, using ML maximum likelihood estimation, have different values and different SNR offset simulation results shown in Fig.)