基于STM32的wifi模块连接实现

opnet14.5实现陈敏版opnet网络仿真第九章示例

利用STM32单片机驱动HCSR04超声波测距模块，并增加蜂鸣器报警装置和LCD显示装置。LCD实时显示测距仪和被测物之间的距离信息并用点阵表示。距离过近则蜂鸣器报警。

基于java平台，可用于WSNs网络信任机制仿真模拟，图形化界面，附带源码，只要编写节点信任值计算公式相关的类即可与经典信任机制的性能做相关比较。相关论文查阅百度文库

FPGA工程设计高级研修班_Xilinx.pdf (30 MB) FPGA设计高级技巧_Xilinx.pdf (2.94 MB) Xilinx ROM使用中文教程.pdf (226.08 KB) Xilinx_FPGA_Digital_System_Design_Primer.pdf (7.02 MB) Xilinx_FPGA_开发环境的配置.pdf (420.63 KB) Xilinx_FPGA开发全攻略_基础篇.pdf (6.72 MB) Xilinx_FPGA开发全攻略_技巧篇.pdf (4.4 MB) Xilinx_HDL_Coding_St

小波方差用于调制识别，matlab程序，已经调试通过。

电能表的软件系统包括程序数据结构模块、程序初始化与电表运行处理模块、事件分配查询管理处理模块及显示处理模块、通讯处理模块、电量处理模块、时间与时段管理处量模块、电表最大需量处理模块八大部分组成，各个部分都有其特殊的任务，在电表系统中完成它们相应的功能。●●●●程序数据结构部分●●●●●●●●●程序数据结构部分程序数据结构模块是对程序中的数据进行分析,合理的分配数据内存,定义程序涉及的变量。它是根据整个程序的算法来制定的,同时一个好的数据结构对整个程序的编写有非常重要的作用,因此根据电能表软件系列实现的功能及其算法制定合理的数据结构。电能表的数据结构包括两个部分:内存数据结构和数据结构与常量结构。●这个是与常量的数据结构,在显小与数据通讯都会使用这个结构●●●●●●●●●程序常量数据结构部分●●●●数据标示项数据标示表示的正反数据存放的格式数据值的长度数据在与的偏移量数据显示的符号通过此结构可以把所要显示、通讯的数据在或者在存放的位置长度以极标志等内睿取出供所需要的函数使用●●●●程序数据结构部分●●●●●●●●●合相有功功率合相有功瞬时功率电压有校值合电流有校值当前的线频率合功率因数合相电压与电流的夹角当前的电能此结构可以对的计量参数寄存器一次可以全读出,并同时也可以分别取出对应所需要的参数●●●●●●●●●程序初始化与电表运行处理●●●●程序初始化与电表运行处理●程序初始化与电表运行处理模块是对整个程序进行初始化,并对电表运行的六种状态进行转换。程序初始化包括两个部分:初始化和电表各部件初始化。初始化是对各部件进行初始化,为各部件在程序工作时提供合适的初始状态,它包括配置口工作模式、看门狗初始化、定时器初始化、键盘中断初始化、串口中断初始化、初始化等等。电表各部件初始化是对电能表系统各部件进行配置工作状态,初始化它们的工作方式,为程序工作提供电表部件初始状态,它包括指示灯初始化显示初始化、实时时钟初始化、电量恢复、通讯信道、历史电量处理等等部件的初始化。●●●●口工作模式●●●●●●●●●口工作模式如果有没有用到的口,作输入时要通过电阻与或者与连接,作输出时要输出置与置因为设备输入端未连接将会产生工作枚障,如果输入未连接,则由于噪音等原因可能会产生内部输入电平,从而导致故障。如果在上电时口为输入,但电池供电时口的电平为不确定状态时,也应对口作相应的处理●当主时钟切换到副时钟时,应将主时钟的口设为输出置看门狗初始化●●●●●●●●可选字节设定地址:080H/Ls0HrWINDOW1F工NDOWWDCSWDCS1WDCSLSROSC看门狗的开了NDCW1VINDOMO看门狗定封器窗口打开周期窗时间设定为1C5WDTCN看门狗定时器计数器的操作控制/非法汸问检测琹止计数器操怍复位后停止计数),禁止非法访问检测操作允许计数器橾作;愆位后始计敏),氘许非法访闻枱测橾作看门狗定时器HD,FDCS1HDCEO昋门狗定时器溢出吋间0z°/faL(3.88ms)时间间隔设置n/f!(7.76ms):25/土R(3L.03ms0CTL (62, OG sD0125fsL(124.12mE)fL(496.4LSROSC内部低速振蓠器操作看门狗设为不可由软件停1(出将1写入C寄存器的第0红 SESTOP)时停l操作不能停止(即使将1写入 SRSTOP位也不停止操作)能停止单片机内部的看门狗把设为不能停止时为硬看门狗,必须在窗口打开才能清狗否则单片机会复位,●●●●串口中断初始化●●●●●●●●●●由于多功能表有二个供通讯的口,一个供红外通讯口。但单片机只有二个哪么就需要模拟其中一个的分频时钟信号不能得到此时应选的分分频时钟信号模拟红外通讯,需要个外部中断(接收接收管上的电平信号并每要检测屮断口的信号),二个定时器(输出载波与的时间间隔)串口中断初始化有关UART0的寄存器波特率发生控制寄存器0( BRGCO)真出:F? iH Aher reset: 1Fh民WEymarBRGCOTPE01TP90O0 MDLO4MPLSMDLDe MDLoTBLOm(TPS01,TPS00)=(0,0)选择定时器TM50的输出作为TPSDTP500Base cock (IxeLKol selection"fPRs=2 MHz fFRE-5 MHz fFRs-B MHz1FFG-10MH基本时钟TM50 DutpfEgli1 H25 H4 HT5 MHz250kF2H25 kHz1 MH26H2625kH15625kH2250H3125k因为如果选择外围硬件时钟fprs作为基本时钟,那么就不可能产生出1200bps的波特率。MDLO4MDLOS MDLO2 MDLOT MDLOG k Selectian of 5-titcounterx Selng Erchbiled0acLM/B0(MDLO4, MDL03, MDLO2MDL01,ML00)=(0,1,1,0,1),k=13028 fruTa2a scLk/?31t/3

卡尔曼滤波做目标跟踪 效果不错 在此基础上可以增加多个跟踪目标，采用相关关联技术实现多目标跟踪

2020计算机考研408教材,全是最新版本。计算机操作系统-汤子瀛，计算机组成原理-唐朔飞，数据结构-C-严蔚敏，计算机网络-谢希仁，数据库系统概论-第5版_完整版（王珊，萨师煊） PDF电子书下载 带书签目录m

介绍了三相异步电机的结构和原理，以及几种常见的交流调速系统，并着重阐述了调压调速系统。通过对调压调速系统各模块的分析，利用Matlab/Simulink建立了三相异步电机调压调速系统开环和闭环模型，得出了两种情况下的仿真结果，并对结果进行了分析、比较。本次仿真运用了软件中许多现成的模块，并将实验中所建模块封装起来，以便下次使用。使用时只需调出所需模块并置入相应的电机参数，就可方便地进行仿真，而且仿真的各变量结果可靠、稳定，证明该模型具有快捷、灵活、方便、直观等一系列优点。通过对三相异步电机的调压调速系统的仿真，验证了建模方法的有效性，并为以后在此基础上进行其他电机或调速系统研究提供了借鉴和方便

OFDMA系统分析与设计的国外经典教材Chapter 1 Introduction to OFDM and OFDMAChapter 2 Characterization of the Mobile Wireless ChannelChapter 3 Fundamentals of Digital Communications and NetworkingChapter 4 Fundamentals of OFDM and OFDMA: Transceiver StructureChapter 5 Physical Layer: Time and FrequencyChapter For a listing of recent titles in theArtech House Mobile Communications Library,turn to the back of this bookOFDMA System Analysis and DesignSamuel C. YangARTECHHOUSEBOSTON LONDONartechhouse. comLibrary of Congress Cataloging-in-Publication DataA catalog record for this book is available from the U.S. Library of CongressBritish Library cataloguing in Publication DataA catalogue record for this book is available from the british libraryISBN-13:978-1-60807-076-3Cover design by vicki KaneC 2010 Artech House685 Canton streetNorwood. MA 02062All rights reserved. Printed and bound in the United States of America. No partof this book may be reproduced or utilized in any form or by any means, elec-tronic or mechanical, including photocopying, recording, or by any informationstorage and retrieval system, without permission in writing from the publisherAll terms mentioned in this book that are known to be trademarks or servicemarks have been appropriately capitalized artech House cannot attest to theaccuracy of this information. Use of a term in this book should not be regardedas affecting the validity of any trademark or service mark10987654321To my beautiful wife JennyContentsPrefaceAcknowledgmentsXVCHAPTER TIntroduction to ofdm and ofdma1.1 Motivation1.2 Conventional FDm1.3 Advantages of FDm1.3.1 Intersymbol Interference(ISI)and Multipath Fading1.3.2 Modulation and Coding per Subcarrier1.3.3 Simple equalization1.4 Disadvantages of FDM1.5 Basics of ofdm1.6 Advantages of OFDM1.6.1 Low-Complexity modulation1.6.2 Spectral Efficiency1.7 Basics of ofdma1.8 Advantages of OFDMA121.9 Some Practical issues of ofdm and ofdma1.9.1 Time Domain: Interblock Interference131.9.2 Frequency Domain: Intercarrier Interference131.10 OFDM and Dsss141.11 Overview of the book14References15Selected BibliographyCHAPTER 2Characterization of the mobile wireless channel2.1 Introduction2.2 Link analysis2.3 Distance Dimension: Propagation Loss2.3.1 Path Loss2.3.2 Shadowing Loss24Contents2.3.3 Multipath Fading26Example 2.1282.3.4 Concluding Remarks292.4 Time Dimension: Multipath Delay Spread302.4.1 Delay Spread30Example 2.231Example 2.3312. 4.2 Coherence bandwidth322.4.3 Implications for OFDM352.5 Frequency Dimension: Doppler Spread362.5.1 Doppler Spread36Example 2. 4372.5.2 Coherence time2.5.3 Implications for OFDM402. 6 Conclusions41References43Selected Bibliography44ChAPTER 3Fundamentals of Digital Communications and Networking453.1 Introduction453.2 Basic Functions of a Transceiver453.3 Channel Coding473.3.1 Linear block codes473.3.2 Convolutional codes493.4 Symbol mapping and modulation3.5 Demodulation563. 5. 1 Matched Filter563.5.2 Symbol Error3.6 Adaptive Modulation and Coding603.7 Cyclic Redundancy Check(CRC)623.8 Automatic Repeat Request(arQ)643.8.1 Stop-and-Wait ARQ643.8.2 Sliding Window arQ653.9 Hybrid ARQ67References69Selected bibliographyCHAPTER 4Fundamentals of ofdm and ofdma: transceiver structure4.1 Basic Transmitter functions714.2 Time domain: guard time4.3 Frequency Domain: Synchronization744.4 Basic receiver functions754.5 Equalization764.6 OFDM Symbol79Contents4.7 OFDMA Transmitter844. 8 OFDMA Receiver4.9 OFDMA4.9.1 Frequency diversity4.9.2 Multiuser diversity914.9.3 Concluding Remarks4.10 Peak-to-Average Power ratio924.11 Conclusions93References94Selected Bibliography95CHAPTER 5Physical Layer: Time and Frequency975.1 Introduction5.2 Distributed Subcarrier Permutation: Forming Subchannels onDownlink5.2.1 Full Usage of Subchannels(FUSC1005.2.2 Partial Usage of Subchannels(PUSC)1015.2.3 Tile Usage of Subchannels 1(TUSC1)1025.2.4 Tile Usage of Subchannels 2(TUSC2)1025.3 Distributed Subcarrier Permutation: Forming Subchannels on Uplink 1025.3.1 Partial Usage of Subchannels(PUSC)1035.3.2 Optional Partial Usage of Subchannels(Optional PUSC)1035.4 Adjacent Subcarrier Permutation: Downlink and Uplink1045.5 Summary of Subcarrier Permutation Modes1045.6 Bursts and Permutation Zones1055.7 Subframes and frames1075.7.1 Preamble1105.7.2 Frame Control Header(FCH)1105.7.3 Downlink MAP (DL-MAP)and Uplink MAP(UL-MAP1115. 8 TDD and FDD5. 9 System Design Issues1125.9.1 Frequency Diversity and multiuser diversity1125.9.2 Segmentation1125. 10 Adaptive burst profiles1155.10.1 Burst Profiles1155.10.2 Channel Quality Feedback116References117ChAPTER 6Physical Layer: Spatial Techniques1196.1 Introduction6.2 Spatial Diversity: Receive Diversity1206.2.1 Receive Diversity: Antenna Selection1226.2.2 Receive Diversity: Maximal Ratio Combining6.3 Spatial Diversity: Transmit Diversity123Contents6.3. 1 Transmit Diversity: Open-Loop 2 X 11246.3.2 Transmit Diversity: Open-Loop 2X 21266.3.3 Transmit Diversity: Closed-Loop Antenna Selection128Example 6.11296.3.4 Transmit Diversity: Closed-Loop precoding1306.3.5 Remarks1326.4 Spatial Multiplexing1336.5 MIMO-OFDM1366.6 Beamforming1366.7 System Design Issues139References140Selected Bibliography141CHAPTER 7Medium Access control: architecture and data plane1437.1 MAC Architecture1437.2 Convergence Sublayer1457. 2.1 Address Mapping( Classification1467. 2.2 Header Suppression1467. 3 Common Part Sublayer1477.3.1ARQ1477. 3.2 MAC SDU and MAc pdu1487.3.3 Fragmentation/Packing1497.4 Security Sublayer152References152chaPTeR 8Medium Access Control Lower Control plane1538. 1 Introduction1538.2 Scheduler1538.3 Bandwidth Request1558.3.1 Request in Existing Uplink Allocation1568.3.2 Unicast Polling1568.3.3 Multicast and Broadcast Polling1578.3.4 Contention-Based Request for OFDMA1578.4 Control Signaling1588.5 Ranging1598.5.1 Initial Ranging1598.5.2 Periodic Ranging1608.5.3 Handover ranging1618.6 Power Control1618.6.1 Uplink Power Control: Closed-Loop1648.6.2 Uplink Power Control: Open-Loop1668.6.3 Assignment of Uplink Modulation and Coding8.6.4 Concluding Remarks168References169ContentsChaPTER 9Medium Access Control: Upper Control plane1719.1 Introduction1719.2 Network Entry1719.2. 1 Synchronization with Downlink of Base Station and acquisitionof parameters1739.2.2 Initial Ranging1739. 2.3 Negotiation of Mobile Capabilities1749.2.4 Security Procedures1749.2.5 Mobile registration1759.2.6 IP Connectivity1759.2.7 Connection Setup1769.3 Mobility Management: Link Handover1769.3.1 Cell Reselection1779.3.2 Hard Handover(HHO1799.3.3 Macro Diversity Handover(MDHO)1849.3.4 Fast Base Station Switching(FBSS1879.3.5 System Design Issue: H Add and h delete1899.3.6 Concluding Remarks1919.4 Mobility management: Network handover192References192CHAPTER 10Quality of Service(Qos)19510.1 Introduction19510.2 Definitions and Fundamental Concepts19510.2.1 Service Flows and Qos Parameters19510.2.2 Connections19610.3 Object Relationship Model19710.4 Service flow transactions19910.4.1 Creating a Service Flow19910.4.2 Changing a Service Flow20010.4.3 Deleting a Service Flow20310.5 QoS Parameters20410.6 Scheduling Services20610.6.1 Unsolicited Grant Service(UGS)20610.6.2 Real-Time Polling Service(rtPS20710.6.3 Extended Real-Time Polling Service(ertPS20710.6.4 Nonreal-Time Polling Service(nrtPS20810.6.5 Best Effort(BE)20810.6.6 Remarks209References210