ONVIF2.0协议珍藏版

给出了OFDM在卫星通信中的系统框图并 在Simulink中仿真实现，利用改进的CMA恒模算法进行盲均衡处理，来去除时变卫星信道对信号的影响,基于4阶累积量的方法 将OFDM信号与其他调制类型信号区分开来(OFDM is given in the satellite communication system block diagram and Simulation in Simulink using the modified constant modulus algorithm CMA for blind equalization, to remove the time-varying satellite channel on the signals, based on 4-order cumulant method OFDM signals and other types of signal modulation to distinguish)

gardner位同步算法，实现数字通信系统中位同步(gardner bit synchronization algorithm to achieve bit synchronization in a digital communication system)

The following file contains three types of digital communications sampling. Contains ideal sampling, natural sampling and ZOH sampling, operate only for one single frequency signal, can be modified to add multiple signals with a base frequency. Greetings, I hope it helps.

By building the generalized Sigmoid function relationship between normalized step-size and the power of error signal, a novel variable step-size NLMS algorithm is proposed. It is proved that the step-size of NPVSS-NLMS changes as the new algorithm does when A=σv -m and B=2. The physical meanings of the parameters in this algorithm are explored. The theoretical analysis illustrate that this algorithm combine the virtues of NPVSS-NLMS and Sigmoid function, and it leads to faster convergence rate and lower final misalignment. The computer simulation results support the theoretical analysis.

是c语言的编程指导手册，分为基础篇和函数篇，使编程人员能快速查找函数等的使用方法。(This is the C language programming guide, divided into basic function and using method, so programmers can quickly find the function. The C language is a programming guide, divided into basic function and using method, so programmers can quickly find the function and so on. )

横重要的leach 协议哦对你有很大的帮助 (Oh cross important leach agreement)

说明：  关于sd卡在嵌入式应用中的资料，是网友亲自翻译的，适用于初用sd卡的爱好者(On the sd card applications in the embedded information is personally Netizen translation for the beginning of the lovers with sd card)

At the beginning of 2004, the standards for third generation (3G) cellular technology were embodied in 483 Technical Specifications published by the two Partnership Projects: 3GPP and 3GPP2.

说明：  ：载波频率偏移是OFDM系统实现的关键问题之一。分析了OFDM 系统载频偏移估计的2 种算法，即利用循环前缀和训练序列方法。它们均为最大似然估计方法。分别讨论了它们的基本 思想、实现方法和仿真结果。可以看出基于循环前缀算法复杂度较小，精度不高，而基于训练序列 的算法有较高的估计精度，但降纸了系统传输效率。(Abstract：Carrier frequency ofset is one of the key problems in OFDM system．Two foundational methods 。cycling prefix—based and training sequence—based algorithms。to estimate OFDM carriers~equency ofset are analyzed．Then it discusses their basic thoughts。implementing methods and simulation resuits． Finally。merits and demerits of every algorithm are supposed．It concludes that the cycling prefix— based algorithm has less complexity and less precision。and that the training sequence—based algorithm has better estimation performance at the cost of transmission efficiency．)

这是一个CD4067B的技术资料，希望对大家有帮助。(This is a CD4067B technical information, we hope to help.)