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Description: 一、前言
前一段时间发表了一篇文章 “Hook API 工具”,没有附带主程序的源代码，这几天翻出来代码加了些注释，现在补上。不过大家还是最好看看牛的书，书上讲解很详细。
二、对代码的简单说明
总共3个工程，1个主程序，1个HookDll, 1个例子Dll。主程序负责启动进程，并将 HookDll 注入。还有一些额外的功能，比如显示 Log, 例子Dll的信息，导出函数等，HookDll 在 DllMain 启动的时候根据配置钩住指定的 API 函数
三、这种方法的缺点
这种方法是在系统 API 函数起始代码 和 自定义代码之间切换。在多线程的环境下，如果正在切换的过程，其它线程调用这个函数，会出现异常，同时，如果已经切换回系统代码，其它线程对这个API 的调用将抓不到。解决方法就是不要切换，这点应该是可以做到的。
四、结束语
在例子Dll 中，模仿了 ws_32.dll 的输出函数，但是不全，而且 Log 信息也不足，感兴趣的朋友如果有比较全的版本别忘了发给我一份 :)
程序大家可以随意修改，保留那个林月如的 Icon 就行了 ^_^
-one, the preamble some time ago published an article entitled "Hook API tool," not incidental to the main program source code, which turned out a few days code plus some notes now fill. But we still look at the best cattle in the book, spoke on the very detailed. Two of the code simple instructions a total of three projects, a program, a HookDll, an example Dll. Main program to start the process and will HookDll injection. There are some additional features, such as Log shows examples Dll information derived function, in DllMain HookDll boot time configuration hooked designated API Function 3, the shortcomings of this method This method is the system API function code and starting from the definition of switching between code. In multithreaded environment, if the switching proces
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Author: ddd |
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Description: 代码大全电子版文件说明：
cc1-5.pdf : 序言，目录，1-5 章
cc6-10.pdf : 6-10 章
cc11-15.pdf : 11-15 章
cc16-20.pdf : 16-20 章
cc21-25.pdf : 21-25 章
cc26-30.pdf : 26-30 章
cc31-33.pdf : 31-33 章，致谢
readme.txt : 本文档-code Daquan electronic version of document : cc1 - 5.pdf : Preamble, directory, 1-Chapter 5 cc6-adaptation : Chapter 6-10 cc11 - ntt_presentation_eng.pdf : Chapter 11-15 cc16 - 20.pdf : Chapter 16-20 cc21 - 25.pdf : Chapter 21-25 cc26 - 30.pdf : Chapter 26-30 cc31 - 33.pdf : Chapter 31-33, thanks readme.txt : This document
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Author: ff |
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Description: 文章通过对实序列快速傅里叶变换的算法推导及Mallat 算法原理的分析，根据离散小波变换（DWT）算
法结构特征，提出了一种离散小波的快速变换算法，给出了相应的算法步骤。从数学理论上进行了论证，并把该算法
应用到静态图像处理中，得到了很好的快速和重建效果，具有一定的实用价值。
关键词：小波分析；Mallat 算法；快速小波算法 图像处理
中图分类号：TN914 文献标识码：A
1 引言
小波分析是近十多年来迅速发展起来的新兴学科和信号分析理论，是继傅里叶分析方法之后的重
大突变。它具有时域局部化和频域局部化的优点，而且高频端的时间间隔小（有着高的时间分辨率），
低频端的时间间隔大（有着高的频率分辨率），这与人的视觉机制由粗到细的认识过程相一致，固而有
“数学显微镜”之称，是进行信号处理和分析的有效工具。特别是其多分辨率分析理论及其快速算法
——Mallat 算法在数字信号处理和数字通信-articles on real sequence Fast Fourier Transform algorithm Derivation Principle and Mallat algorithm analysis, discrete wavelet transform (DWT) algorithm structure, a fast discrete wavelet transform algorithm, corresponding to the given algorithm steps. From a theoretical mathematical proof, and the algorithm is applied to the static image processing, to be a good and rapid reconstruction effect, it is of great practical value. Keywords : wavelet analysis; Mallat algorithm; Fast Wavelet Image Processing Algorithms Key words : ODFD code : A preamble to a wavelet analysis of the last 10 years developed rapidly emerging disciplines and signal analysis theory, Fourier analysis is the method after a major mutation. It is localized in time domain and frequency domain of local advantages, but hig
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Author: 顶替 |
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Description: 本书以15个课程设计题目为框架，从各个方面介绍了Java在应用系统开发和网络开发中的技巧。各个课程设计题目相互独立，可以从任何一个课程设计题目开始阅读本书。每个课程设计题目都给出了详细的设计步骤，包括设计内容、总体设计、具体设计、软件发布、课程设计作业等。本书全部程序代码可由前言中指定网站下载。-the book to 15 courses a design as a framework, from all aspects of the Java application development and network development skills. All curriculum design topics of mutual independence, can be from any one subject curriculum design started reading the book. Each course will have a design is a detailed design steps, including the design, overall design, the specific design, software, curriculum design workbooks. All of the code can be specified in the preamble to download.
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Size: 212397 |
Author: su |
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Description: 面向对象技术，第一章，前言，看看好的话，可以继续-object-oriented technology, the first chapter, the preamble to see good, can continue
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Author: asd |
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Description: 电力系统VP规约
前言
本规约适用于CSC 2000变电站综合自动化系统前置单元与主站之间的通信。信息传输通过LONWORK进行，数据传输单元采用网络变量（NV）的形式。
-Power Systems VP Statute preamble to the Statute applicable to the CSC 2000 Substation Automation System front alone Yuan and the main communications between the station. LONWORK through information transmission, data transmission network modules variables (NV) form.
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Size: 19717 |
Author: 王庆华 |
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Description: WLAN仿真－发送机
wlan No Comments
设置完系统参数后，开始产生发送数据。
1. 产生随机的发送bit（tx_bits），这里不考虑信道编码。
2. QAM映射
3. 将数据映射到不同载波，形成OFDM符号
4. 产生pilot，并将pilot插入OFDM符号中
5. 加入dc和guard子载波
6. 进行ifft，将频域信号变到时域，并加入循环前缀
7. 对信号进行overlap window
8. 在时域产生short preamble
9. 在时域产生long preamble
10. 将preamble和数据符号组成packet
11. 升采样
得到信道传输的数据Tx_signal_up
具体程序见附件 wlan_transmitter.m-WLAN Simulation- wlan No Comments transmitter system parameters set finished, the beginning to have to send data. 1. Have sent random bit (tx_bits), here does not consider channel coding. 2. QAM mapping 3. The data is mapped to a different carrier to form OFDM symbols 4. Have a pilot, and pilot inserted OFDM symbols 5. Adding dc and guard subcarriers 6. To carry out ifft, will change the frequency domain signal to time domain, and add cyclic prefix 7. the signals overlap window8. In the time domain have a short preamble9. In the time domain have a long preamble10. the preamble and data symbols packet11. or sampling received data transmission channel Tx_signal_up specific procedures see Annex wlan_transmitter.m
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Author: 福东方 |
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Description: $Header: /cvsroot/nsnam/ns-2/mac/mac-tdma.cc,v 1.16 2006/02/22 13:25:43 mahrenho Exp $
//
// mac-tdma.cc
//
// Preamble TDMA MAC layer for single hop.
// Centralized slot assignment computing.
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Size: 6144 |
Author: Dr. Rashid |
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Description: X-MAC, a low power MAC
protocol for wireless sensor networks (WSNs). Standard
MAC protocols developed for duty-cycled WSNs such as
BMAC, which is the default MAC protocol for TinyOS, employ
an extended preamble and preamble sampling.
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Size: 141312 |
Author: Shereen |
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Description: wiax preamble and frequency offset estimation
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Size: 10240 |
Author: kimo |
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Description: this code is for Wimax(ieee standard 802.16) and other ofdm based transmitter and makes preamble for their training frames to make synchronization easier.
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Size: 1024 |
Author: amin |
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Description: MATLAB环境下基于OFDM系统的前导序列中短训练序列的误差估计仿真程序-the offset of the short training sequence of preamble
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Size: 1024 |
Author: xiahxp |
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Description: MATLAB环境下基于OFDM系统的前导序列中短训练序列的误差估计仿真程序-the offset of the long training secquence of preamble
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Size: 1024 |
Author: xiahxp |
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Description: Frequency offset estimation in 802.11a OFDM preamble
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Size: 4096 |
Author: sun2012flower |
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Description: 这是前导码检测的程序，使用巴特码作为前导码，并采用移动相关检测之-This is the preamble detection procedures, the use of Butte code as a preamble, and detection of the moving correlation
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Size: 3072 |
Author: 朱峰 |
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Description: 在WiMax中，探测导频和解码FCH。从国外网站获得。-In Wimax，just detect preamble and decode
FCH for a hardcoded example values. E.g. we assume 10MHz and 1024 FFT.
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Size: 75776 |
Author: gao |
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Description: Script for computing the frequency offset from an OFDM short preamble constructed per symbol IEEE 802.11A specifications. -Script for computing the frequency offset from an OFDM short preamble constructed per symbol IEEE 802.11A specifications.
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Author: abdelsalam |
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Description: MIMO OFDM 技术将成为第4 代移动通信系统的关键技术, 因MIMO OFDM 对时间和频率偏移非常敏感,
因此MIMO OFDM 同步显得尤为重要。提出了一种新的MIMO OFDM 定时同步和频偏同步技术。以GCL 序列为基础设
计了一个新的符合MIMO OFDM 同步技术的导频序列, 通过对该导频序列进行2 次相关得到频率估计, 并将所得频率
运用到定时同步中, 得到更为准确的时间估计。仿真结果表明, 在相同的信噪比情况下, 该方法可以使得系统的误码
率和帧传送误码率相对传统方法得到进一步减小。-MIMO OFDM will become a key technology of the fourth generation mobile communications system. However, MIMO OFDM is
sensitive to the CFO and timing synchronization, so the MIMO OFDM synchronization technology is very important. This paper proposes an
accurate technique for timing and frequency synchronization of multiple input multiple output ( MIMO ) orthogonal frequency division
multiplexing ( OFDM) systems. The technique derives a new preamble signal based on GCL sequences, according with the MIMJO OFDM
synchronization. The carrier frequency offset ( CFO) estimation is obtained through taking double correlation operations on the preamble signal,
and used in the timing synchronization to gain accurate time estimation. The simulation results show that at the same SNR, the proposed method
can reduce the BER and the frame transmission BER of the system compared to the conventional method.
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Author: 蜡笔 |
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Description: Time Frequency Multiplex Preamble Design for Joint I1Q Imbalance, CFO and Channel Estimation in OFDM Systems
IEEE Paper
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Size: 1665024 |
Author: RITEN PATEL |
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Description: 可实现OFDM电力载波通信的前导序列检测，能进行连续多个前导检测-Can achieve OFDM power carrier communication leading sequence detection, can carry out a number of continuous preamble detection
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Size: 1024 |
Author: Zhong YJ |
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