patterns1

介绍了三点垂直线阵被动定位的原理. 结合矢量水听器测得的方位角和高低角及到达 阵元间的时延差, 建立了三维坐标下的状态方程和观测方程.运用扩展卡尔曼滤波算法, 研究了该系统的目标运动分析问题. 通过蒙特卡洛模拟仿真试验, 结果表明上述方法具有较高的定位性能,有较强的使用价值. (Introduced three vertical linear array passive location principle of vector hydrophone. Combining the measured azimuth angle and pitch angle and arrival time delay difference between array elements, establish the three-dimensional coordinates of the state equation and observation equation. Using the extended Calman filter algorithm, on the target motion analysis by Monte Carlo simulation. Test, results show that the method has high positioning performance, has the strong use value.)

QPSK的编译 设定噪声为高斯白噪声，对2ASK、2FSK、2PSK、2DPSK等各种调制方式及相应的主要解调方式下（分相干与非相干）的误码率进行统计，并与理论值进行比较，以图形方式表示误码率与信噪比间的关系。(QPSK compiled Set the noise is Gaussian white noise, right 2ASK, 2FSK, 2PSK, 2DPSK variety of modulation and demodulation mode corresponding to the main (sub-coherent and non-coherent) error rate statistics, and with the theoretical value comparison, a graphical representation of bit error rate and SNR relationships.)

VC++远程项目开发源码，可以学习相关的知识。(VC++ remote project development source code, you can learn related knowledge.)

这是一份java实现的飞鸽传书，压缩包里的为txt文件，里面有注释和对应的包，在开发环境下根据package建立相应的包后即可运行，是一份不错的学习代码。

涉及的功能：1、使用一位高手提供的135端口信息发送函数.2、一个ini文件类用于记录IP信息.3、自定义一个消息和相关代码,用于把程序缩小到系统托盘.-of functions : 1, the use of an expert for the 135-port messaging function .2, an ini file type used to record information .3 IP, since the definition of an information and code for the procedure to reduce the system tray.

Douglas Peucker算法的matlab实现，应用于地图制图中的综合制图。其中有中国地图数据加以验证。可以自设threshold。(The matlab implementation of Douglas Peucker algorithm is applied to cartographic generalization in cartography. Among them, the map data of China is verified. You can set threshold yourself.)

polyadd 代码 可以进行多项式的求值及求根的运算，主要进行多项式加法的运算(polyadd 代码)

针对MIMO-OFDM系统中期望最大化(EM)信道估计算法在高信噪比(SNR)下带来的误差地板(EF)现象,且OFDM符号的数据传输效率随发射天线数的增加而明显降低,提出一种改进的高效EM信道估计算法。该算法首先引入一种准确的等效信号模型并推导出一种修正的EM算法,改善了EM算法在高SNR下的性能 在多个OFDM间利用相位正交导频序列来提高数据传输效率,同时进行联合信道估计以提高估计性能。仿真实验验证了所提算法具有更高的信道估计性能和更高的数据传输效率。(For multiple-input multiple-output with orthogonal frequency division multiplexing(MIMO-OFDM) systems,the error floor(EF) phenomenon at high signal noise rate(SNR) was induced by the expectation maximum(EM) channel estimation algorithm.In addition,the data transmission efficiency was declined obviously with the increasing number of transmit antennas.According to these problems,an improved and efficient EM channel estimation algorithm was pro-posed.Firstly,an accurate and equivalent signal model was introduc...)

smtp源代码集合，一共7个，包括发送和接收-smtp source code collections, a total of seven, including the sending and receiving

This document introduces a useful ultra wideband chipset that can be used for ranging and localisation purposes giving an accuracy of upto 10 cm for LOS scenarios