envelop

基于snell定律的射线追踪，与一般算法不一样，精度比较高(Based on Snell s Law ray tracing, and the general algorithms are not the same, relatively high accuracy)

地心惯性坐标系到地理坐标系；地理坐标系到地球坐标系等转换，共计8个程序(geocentric inertial coordinate system of geographical coordinates; Geographic coordinates of the Earth coordinate system conversion, a total of eight procedures)

Capacity and performance analysis of space-time block coded MIMO-OFDM systems over Rician fading channel

定位技术是无线传感器网络中关键的基础支撑技术, 目前提出了许多静态网络的节点定位算 法, 移动无线传感器网络的定位研究相对较少. 针对定位节点和参考节点随机运动的网络模型, 提出了 一个基于动态网格划分的蒙特卡罗定位算法. 算法中当接收的参考节点数超过一定阈值时使用最远距 离节点选择模型, 选出部分参考节点参与定位和信息转发, 节约能耗. 接着基于选择的或所有接收的参 考节点构建采样区域, 进行网格划分, 使用网格单元数计算最大采样次数, 在采样区域内采样并使用误 差补偿的运动模型进行过滤, 提高了采样效率, 减少了计算开销, 并保证了较好的定位精度. 仿真实验表 明算法在定位精度, 计算开销、能耗等方面都具有较好的性能.(Positioning technology is critical in wireless sensor networks based supporting technologies, currently made many static network node localization algorithms, the positioning of mobile wireless sensor network research is relatively small. Locate node and a reference node for random motion network model, proposed a Dynamic meshing based Monte Carlo localization algorithm. algorithm when the received reference nodes exceeds a certain threshold, the most distant node selection model selects some reference nodes involved locating and forwarding information, save energy. then based on the selection or building all received reference node sampling area, meshing, the number of grid cells used to calculate the maximum sampling frequency, the sampling area sampling and using motion model error compensation filter to improve sampling efficiency, reducing the computational overhead and to ensure a better positioning accuracy. Simulation experiments show that the algorithm in positioning accuracy,)

非常方便的读写固定列宽的时间日期数据，读文件与存文件都是文本格式(Very convenient to read and write fixed column width of the time and date data, read the file and save files are text format)

根据接收数据阵x 、信道长度LH、过采样因子q ，采用Hopfield 盲处理方法，恢复出相应于x的尽可能长的BPSK发送序列，并估计 信道。(Based on the received data matrix x, the channel length of the LH, oversampling factor q, with Hopfield blind treatment, recovery corresponding to x, send a sequence of BPSK as long as possible, and the channel estimate.)

这是关于sharping处理的源程序，希望大家多多指教(This is dealt with on sharping source, I hope everyone exhibitions)

image boundry extraction

Brazo robotico proyecto para laboratorio

implement the edge detection and segmentation using matlab.Welcome to download.