m序列产生器 用于扩频通信

directdraw 教程-directdraw Guide

可自行转换为代码 解决的问题： (1) 请设计DS-CDMA一种具体的码分导引辅助的信道估计方法，接收机分别采用等均益合并、最大比合并。用Simulink进行仿真，测量BPSK的误码率性能，画出比特信噪比与信道估计均方误差的关系曲线，画出比特信噪比与误码率的关系曲线，请解释在误码率为0.01时，两种合并方式所表现的不同的物理意义。 (2) 设频率已经同步，请设计DS-CDMA一种具体的单停顿滑动相关时间同步方法，用Simulink进行仿真(自己编写代码S-Function方式)，分析所设计方案的时间同步精度，画出比特信噪比与捕获概率的关系曲线。 请点击左侧文件开始预览 ！预览只提供20%的代码片段，完整代码需下载后查看 加载中 侵权举报

test to get cell id from sony ericsson phone and get latitude and longitu from cell id

Ph.D thesis from M.H.Perrott, about Fractional-N PLL design.

介绍了QAM调制的星座图，对于学习QAM调制的有一定的指导意义。-Introduction of the QAM modulation constellation diagram for QAM modulation of learning have a certain significance.

ROC curves illustrate performance on a binary classification problem where classification is based on simply thresholding a set of scores at varying levels. Lenient thresholds give high sensitivity but low specificity, strict thresholds give high specificity but low sensitivity the ROC curve plots this trade-off over a range of thresholds (usually with sens vs 1-spec, but I prefer sens vs spec this code gives you the option). It is theoretically possible to operate anywhere on the convex hull of an ROC curve, so this is plotted too. The area under the curve (AUC) for a ROC plot is a measure of overall accuracy, and the area under the ROCCH is a kind of upper bound on what might be achievable with a weighted combination of differently thresholded results from the given classifier -ROC curves illustrate performance on a binary classification problem where classification is based on simply thresholding a set of scores at varying levels. Lenient thresholds give high sensitivity but

本文介绍了在Windows平台下串行通信的实现机制，讨论了根据不同的条件用Visual C++ 设计串行通信程序的三种方法，并结合实际，实现对温度数据的接收监控。 -This article describes the serial communication under Windows platform for the realization of a mechanism to discuss the different conditions used in accordance with Visual C++ The design of serial communication program in three ways, combined with the actual temperature data to realize the receiver monitor.

一个不错的jakes模型仿真,是老外写的,取自一书-Jakes a good model simulation, is written by a foreigner, from

FD30调频无线对讲机 电路原理图 很难得的资料！-FD30 FM wireless intercom circuit diagram of information hard to come by!

本代码是关于定时关机的程序,能帮助理解定时关机的原理及实现过程-The code is on the regular shutdown procedure, can help understand the timing and realization of the principles of the shutdown process