This project aim was to build wireless software modem for data communication between two computers using an acoustic interface in the voice frequency range (20Hz– 20,000Hz). The transmitting antenna is a speaker (frequency response of: 90Hz – 20,000Hz) and the receiving antenna is a microphone (frequency response of: 100Hz – 16,000Hz). The test files used as information files were text files. This goal was attained both in an incoherent scheme and in a coherent scheme. Build under Matlab code, our modem uses OFDM (orthogonal frequency division multiplexing) modulation, synchronization by LMS sequence, channel estimation (no equalizer) via pilot tones. The symbols are either PSK or ASK for a constellation size of 2 or 4. To optimize the probability of error, These symbols were mapped using Gray mapping. Report
標簽： communication computers software wireless
上傳時間： 2014-05-29
上傳用戶：wangdean1101
無線網卡驅動 固件程序 There are currently 3 "programming generations" of Atheros 802.11 wireless devices (some of These have multiple hardware implementations but otherwise appear identical to users): 5210 supports 11a only 5211 supports both 11a and 11b 5212 supports 11a, 11b, and 11g
標簽： programming generations currently wireless
上傳時間： 2014-01-22
上傳用戶：aa54
The Fuzzy Clustering and Data Analysis Toolbox is a collection of Matlab functions. Its propose is to divide a given data set into subsets (called clusters), hard and fuzzy partitioning mean, that These transitions between the subsets are crisp or gradual.
標簽： Clustering collection functions Analysis
上傳時間： 2016-03-19
上傳用戶：1427796291
Data mining (DM) is the extraction of hidden predictive information from large databases (DBs). With the automatic discovery of knowledge implicit within DBs, DM uses sophisticated statistical analysis and modeling techniques to uncover patterns and relationships hidden in organizational DBs. Over the last 40 years, the tools and techniques to process structured information have continued to evolve from DBs to data warehousing (DW) to DM. DW applications have become business-critical. DM can extract even more value out of These huge repositories of information.
標簽： information extraction predictive databases
上傳時間： 2016-03-19
上傳用戶：啊颯颯大師的
From helping to assess the value of new medical treatments to evaluating the factors that affect our opinions and behaviors, analysts today are finding myriad uses for categorical data methods. In this book we introduce These methods and the theory behind them. Statistical methods for categorical responses were late in gaining the level of sophistication achieved early in the twentieth century by methods for continuous responses. Despite influential work around 1900 by the British statistician Karl Pearson, relatively little development of models for categorical responses occurred until the 1960s. In this book we describe the early fundamental work that still has importance today but place primary emphasis on more recent modeling approaches. Before outlining
標簽： evaluating treatments the helping
上傳時間： 2014-01-25
上傳用戶：jennyzai
This document is intended to serve as an introduction to Wavelet processing through a set of Matlab experiments. These experiments will gives an overview of three fundamental tasks in signal and image processing : signal, denoising and compression. These scripts are selfs contents (needed additional Matlab functions can be downloaded while reading the lectures). Each one of These five lectures should take between 1h and 2h in order to tests the various features of the scripts. One should copy/paste the provided code into a file names e.g. tp1.m, and launch the script directly from Matlab comand line > tp1 . Some of the scripts contains "holes" that you should try to fill on your own. I also provide the complete correction of These lectures as a set of Matlab scripts, but you should try as much as possible to avoid using them.
標簽： introduction processing document intended
上傳時間： 2016-03-22
上傳用戶：qlpqlq
In recent years, the UNIX operating system has seen a huge boost in its popularity, especially with the emergence of Linux. For programmers and users of UNIX, this comes as no surprise: UNIX was designed to provide an environment that s powerful yet easy to use. One of the main strengths of UNIX is that it comes with a large collection of standard programs. These programs perform a wide variety of tasks from listing your files to reading email. Unlike other operating systems, one of the key features of UNIX is that These programs can be combined to perform complicated tasks and solve your problems. One of the most powerful standard programs available in UNIX is the shell. The shell is a program that provides you with a consistent and easy-to-use environment for executing programs in UNIX. If you have ever used a UNIX system, you have interacted with the shell.
標簽： especially popularity operating recent
上傳時間： 2014-11-26
上傳用戶：gaojiao1999
The Microsoft® Windows Vista® Developer Story includes content for developers, and other technology experts and managers, interested in an in-depth exploration of some of the new and extended features in Windows Vista. Top 10 Ways to Light Up Your Windows Vista Apps provides an overview of These features
標簽： developers Microsoft Developer reg
上傳時間： 2014-11-18
上傳用戶：王者A
This source code has been tested under OpenWindows 2.0, Sun s X11/NeWS server. For Xlib programs that use KeyPress events you should either (1) set the FocusLenience resource to `True , or (2) specifically notify the window manager that you want to receive KeyPress/KeyRelease events (but only in programs that need These events).
標簽： OpenWindows programs source server
上傳時間： 2016-03-29
上傳用戶：xieguodong1234
Swarm intelligence algorithms are based on natural behaviors. Particle swarm optimization (PSO) is a stochastic search and optimization tool. Changes in the PSO parameters, namely the inertia weight and the cognitive and social acceleration constants, affect the performance of the search process. This paper presents a novel method to dynamically change the values of These parameters during the search. Adaptive critic design (ACD) has been applied for dynamically changing the values of the PSO parameters.
標簽： intelligence optimization algorithms behaviors
上傳時間： 2014-01-08
上傳用戶：lgnf
