05728856

海洋环境噪声和鱼类叫声的频域波形（fft）(The marine environment and fish noise sounds waveform in frequency domain (fft))

This code applies local histogram equalization on an input image with a view to improve its contrast ratio. The image is read, converted to grayscale and resized with the inbuilt function of MATLAB. The window size may be changed, however, the window shift is pixel by pixel. The output is definitely a better contrast image as compared to the input but checkerboard effect is evident.

in this i have impemented the transmitter used in OFDM,made the GUI and plotted pdf ,papr ,cdf aur ccdf..

Math class complex calculations. There main argument, the complex conjugate calculation. . .

kl变换，dct，dft变换以及信号压缩(kl transform, dct, dft transform and signal compression)

首先在m脚本文件canshuo.m中输入节点个数和路径权重，在命令窗口中输入canshu，用s=12,e=10的格式输入要求的起止点，再输入main即可得到两点之间的路径和长度。(M script file canshuo.m first enter the node number and the right path lies in the command window enter canshu, with s = 12, e = 10 The format of the input requirements of the start and end points, and then enter the main between two points can be obtained path and length.)

说明：  常用小波程序,使用matlab程序编写。(Process-matlab wavelet used to prepare)

认知无线电是一种用于提高无线电通信频谱利用率的新的智能技术. 首先简述认知无线电的背景和概念,针 对认知无线电的频谱感知功能,详细地分析基于能量检测的频谱检测方法,在此基础上研究了噪声方差的不确定 性对检测性能的影响. 针对无线信号检测具有本地局域性和能量检测存在信噪比极限的特点,提出一种分布式有 限合作检测机制,推导出基于“OR”规则的有限合作机制的检测概率,并进行Monte Carlo仿真.(Cognitive radio is a radio communications spectrum used to improve the efficiency of the new smart technology. First, the background and outlined the concept of cognitive radio, spectrum sensing for cognitive radio capabilities, a detailed analysis of the spectrum based on energy detection test In this study the noise variance based on the uncertainty of the detection performance. for wireless signal detection with local detection of localized and there is signal to noise ratio limit of the energy characteristics of a distributed cooperative detection mechanism, derived out based on " OR" rules of the detection probability of the limited cooperation mechanism and conduct Monte Carlo simulation.)

主要内容包括matlab 语言基础、MATLAB程序设计基础、各种数值计算方法程序，可为MATLAB初学者提供学习指导。(The main contents include basic language matlab, MATLAB programming foundation, various numerical methods and procedures, MATLAB provides guidance for beginners to learn.)

fir filter design using matlab program