Matlab_picture_tools_introduction

S7-200以太网通讯图文教程 S7-200通过CP243-1或 CP243_1IT接入工业以太网。 S7-200以太网通信主要有以下几种方式： ★ S7-200之间的以太网通信 ★ S7-200与S7-300/400之间的以太网通信 ★ S7-200与OPC及WINCC的以太网通信 (S7-200 Ethernet communication graphic tutorial )

In this paper, we present and analyze efficient frame synchronization and frequency offset compensation scheme with ternary sequences for an orthogonal frequency division multiplexing (OFDM) system in Rayleigh fading channels. Frame synchronization is an essential procedure for normal operation of the OFDM system because of sensitivity to synchronization errors. And when there are frequency offsets in OFDM frame, the loss of orthogonality occurs and the interference problem among several subcarriers is introduced. These fact leads to the requirement for joint implementation of the frame synchronization and frequency offset compensation.

RTCM协议说明文档，介绍RTCM协议详细内容，帧结构。(rtcm frame )

简明微波讲义，比较实用。希望对大家有用！(Microwave concise notes, more practical. Hope it useful!)

对当前通信信号中常用的数字调相信号BPSK、QPSK、1／4一QPSK、8PSK的调制识别问题，提出了一种基于信号差分高阶累积量的识剐算法。该算法分两个层次进行调制识别，首先利用信号的四阶累积量特征对BPSK、QPSK和{1／4一QPSK、8PSK}信号进行识别，然后再利用信号差分的四阶和八阶累积量特征对1/4-QPSK、8PSK信号进行识别。从理论上分析了的该算法的有效性，并通过计算机仿真验证了算法具有良好的性能。(A recognition algorithm based on differential high-order cumulant is proposed for the modulation recognition problems of BPSK, QPSK, 1/4-QPSK and 8PSK, which are commonly used in current communication signals. The algorithm is divided into two levels for modulation recognition. Firstly, BPSK, QPSK and {1/4-QPSK, 8PSK} signals are identified by using the fourth-order cumulant characteristics of signals, and then 1/4-QPSK and 8PSK signals are identified by using the fourth-order cumulant and eighth-order cumulant characteristics of signal difference. The validity of the algorithm is analyzed theoretically, and the good performance of the algorithm is verified by computer simulation.)

介绍bch的基础知识，包括纠删码的编码和解码(Introduce the basic knowledge of bch, including the encoding and decoding of erasure codes)

dynamips的实际使用方法，很全面喔(the dynamips actual use, very comprehensive!)

利用matlab simulink产生两路模拟语音信号，经过pcm编码、时分复用、DPSK调制经过同一个信道单向传输到对应的接收端。常用的三个模块 simulink、通信模块、信号处理模块。包括课程设计报告。(Using matlab simulink produce two analog voice signals through the pcm encoding, time division multiplexing, DPSK modulation over the same one-way transmission channel to a corresponding receiver. The three modules used simulink, communication module, a signal processing module. Including curriculum design report.)

SSDA算法是一种快速图像匹配算法，希望对大家有所帮助！(SSDA algorithm is a fast image matching algorithm, we want to help!)

重点研究 了低信噪比﹑多径瑞利衰落信道条件下，基于高阶累积量的OFDM信号盲识别技 术。提出了利用奇数阶累积量区分OFDM信号与单载波信号的方法，并对基于三 阶和五阶累积量的算法进行了仿真分析。 (﹑ Focus on the low SNR multipath Rayleigh fading channel conditions, based on cumulant OFDM signal blind identification technology. Made a distinction between the use of odd-order cumulants single-carrier OFDM signal with the signal approach, and based on the cumulative amount of third-order and fifth-order algorithm for the simulation.)