Abstract-The effect of the companding process on QAM signals has been under investigation for the past several years. The compander, included in the PCM telephone network to improve voice performance, has an unusual affect on digital QAM data signals which are transmitted over the same channel. The quantization noise, generated by the companding process which is multiplicative (and asymmetric), degrades the detectability performance of the outermost points of the QAM constellation more than that of the inner points. The combined effect of the companding noise and the inherent white gaussian noise of the system, leads us to a re-examination of signal constellation design. In this paper we investigate the detectability performance of a number of candidates for signal constellations including, a typical rectangular QAM constellation, the same constellation with the addition of a smear-desmear operation, and two new improved QAM constellation designs with two-dimensional warpi
标签： investigation Abstract-The companding the
上传时间： 2013-12-20
上传用户：英雄
An optimal neuron evolution algorithm for the restoration of linearly distorted images is presented in this paper. The proposed algorithm is motivated by the symmetric positive-definite quadratic programming structure inherent in restoration. Theoretical analysis and experimental results show that the algorithm not only significantly increases the convergence rate of processing, hut also produces good restoration results. In addition, the algorithm provides a genuine parallel processing structure which ensures computationally feasible spatial domain image restoration
标签： restoration evolution algorithm distorted
上传时间： 2013-12-21
上传用户：yy541071797
Finally: a hands-on, Java-centric workbook companion for the classic Design Patterns! Workbook approach deepens your understanding, builds your confidence, and strengthens your skills. Covers all five categories of design pattern intent: interfaces, responsibility, construction, operations, and extensions. CD-ROM contains all code examples from the book -- plus bonus code examples not found in the book. About the Author: Steven John Metsker is a researcher and author focused on advanced techniques for magnifying the abilities of object-oriented software developers. A rising star in the patterns community, he was recently invited to join the acclaimed Hillside Group. He is author of Building Parsers with Java? (Addison-Wesley).
标签： Java-centric companion hands-on Patterns
上传时间： 2013-12-01
上传用户：1079836864
The 6.0 release of Visual C++ shows Microsoft s continued focus on Internet technologies and COM, which are key components of the new Windows Distributed interNet Application Architecture (DNA). In addition to supporting these platform initiatives, Visual C++ 6.0 also adds an amazing number of productivity-boosting features such as Edit And Continue, IntelliSense, AutoComplete, and code tips. These features take Visual C++ to a new level. We have tried to make sure that this book keeps you up to speed on the latest technologies being introduced into Visual C++.
标签： technologies Microsoft continued Internet
上传时间： 2014-12-04
上传用户：waizhang
所有重要的重构书籍集锦，包括Martin Flower的重构，Addison Wesley数据库重构，以及重构手册.对于程序员和设计师都是必要的！
上传时间： 2013-12-23
上传用户：jichenxi0730
Korn Shell: Unix and Linux Programming Manual, Third Edition, The By Anatole Olczak Publisher : Addison Wesley Pub Date : December 01, 2000 ISBN : 0-201-67523-4 Pages : 480 Supplier : Team FLY
标签： Programming Publisher Edition Anatole
上传时间： 2014-01-18
上传用户：2404
ST7787 芯片的SPEC，比亚迪2.4inchLCM的SPEC。The ST7787 is a single-chip controller/driver for 262K-color, graphic type TFT-LCD. It consists of 720 source line and 320 gate line driving circuits. This chip is capable of connecting directly to an external microprocessor, and accepts Serial Peripheral Interface (SPI), 8-bits/9-bits/16-bits/18-bits parallel interface. Display data can be stored in the on-chip display data RAM of 240x320x18 bits. It can perform display data RAM read/write operation with no external operation clock to minimize power consumption. In addition, because of the integrated power supply circuits necessary to drive liquid crystal, it is possible to make a display system with the fewest components.
上传时间： 2016-09-22
上传用户：woshini123456
JSP无组件实现WEB上传 CREATE TABLE sz_shouye( id int(11) not null auto_increment, title varchar(255), sub_title varchar(255), keyword varchar(255), author varchar(255), source varchar(255), operator varchar(255), addition varchar(255), belong varchar(255), senddate date, content text, primary key(id) ) create database xcb
标签： auto_increment sz_shouye varchar CREATE
上传时间： 2014-01-13
上传用户：PresidentHuang
C语言编程经典教程，The.C...Programming.Language.Third.Edition.Addison.Wesley.Bjarne.Stroustrup
上传时间： 2016-10-22
上传用户：cx111111
The release of the Microsoft Visual Studio .NET (and Visual C++ .NET in particular) has underscored Microsoft’s increasing focus on Internet technologies, which are at the heart of the Microsoft .NET architecture. In addition to supporting the .NET initiative, Visual C++ .
标签： Visual underscored particular Microsoft
上传时间： 2014-11-23
上传用户：dbs012280
