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
資源簡介：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...
上傳時間： 2013-12-20
上傳用戶：英雄
資源簡介：the intent of the software contained on this CD is to provide support for the material covered in the textbook. All programs have been developed and tested using MATLAB Version 5.2. Although the authors believe that all routines should be c...
上傳時間： 2015-07-11
上傳用戶：離殤
資源簡介：the intent of the software contained on this CD is to provide support for the material covered in the textbook. All programs have been developed and tested using MATLAB Version 5.2. Although the authors believe that all routines should be c...
上傳時間： 2013-12-30
上傳用戶：wweqas
資源簡介：This driver is based on the 2.6.3 version of drivers/usb/usb-skeleton.c but has been rewritten to be easy to read and use, as no locks are now needed anymore.
上傳時間： 2015-11-20
上傳用戶：talenthn
資源簡介：This example demonstrates the use of build-in peripherals on the Philips LPC213x/214x family MCUs. the development environment is ARM s RealView Development Kits for Philips 內附README
上傳時間： 2013-12-24
上傳用戶：924484786
資源簡介：Aiming at the application of passive trackinn based on sensor array, a new passive trackinn usinn sensor array based on particle filter was proposed. Firstly, the“fake points" could be almost entirely and exactly deleted with the aids of ...
上傳時間： 2015-12-31
上傳用戶：trepb001
資源簡介：the goal of this exercise is to investigate the impact of contention window size on the performance of the IEEE 802.11 MAC protocol.
上傳時間： 2016-05-07
上傳用戶：csgcd001
資源簡介：the system of image acquisition base on cpld and cis基于CPLD和接觸式圖像傳感器的圖像采集系統
上傳時間： 2014-01-20
上傳用戶：gtf1207
資源簡介：the effect of flash buttons
上傳時間： 2016-10-14
上傳用戶：sardinescn
資源簡介：This paper presents a novel technique to increase the quality of medical images based on Histogram Equalization. In the proposed method first we have applied a noise reduction method and then we apply some suitable preprocessing on hist...
上傳時間： 2017-04-20
上傳用戶：VRMMO
資源簡介：This program illustrates the effect of alising of frequency leading to signal distortion,the output graph illustrates frequency respose due to alliasing,easy for students learning DSP
上傳時間： 2017-05-30
上傳用戶：daguda
資源簡介：the emphasis of this book is on real-time application of Synopsys tools, used to combat various problems seen at VDSM geometries. Readers will be exposed to an effective design methodology for handling complex, submicron ASIC designs. Si...
上傳時間： 2017-07-05
上傳用戶：waitingfy
資源簡介：OPNET This model compares the effect of prioritizing CBR traffic over VBR traffic.
上傳時間： 2014-12-05
上傳用戶：葉山豪
資源簡介：the Art of C++ by Herbert Schildt ISBN:0072255129 McGraw-Hill/Osborne © 2004 the author of this text applies C++ to a wide variety of high-powered, practical applications, each focusing on a different aspect of the language. Examp...
上傳時間： 2015-07-18
上傳用戶：lx9076
資源簡介：the code on this diskette has been organized by chapter. Each subdirectory containing listing has a readme.txt describing program usage and any relevent file formats. the readme will also describe how to compile the target programs under...
上傳時間： 2016-10-28
上傳用戶：冇尾飛鉈
資源簡介：the advantages of automation can be exploited in order to solve or to minimize the needs of manual approach. In order to support the development of survey accurate cadastral system, an automatic programming approach will be adopted. Data...
上傳時間： 2017-04-29
上傳用戶：520
資源簡介：the purpose of this code is to assist developers get some good ideas for how to build a PayPal shopping cart. It is your job as a developer to ensure that any code provided meets your needs.
上傳時間： 2013-12-21
上傳用戶：851197153
資源簡介：it has been designed to calculate the ergodic and outage capacity of a MIMO Rayleigh channel considering no CSIT and perfect CSIT the channel is assumed to be spatially correlated according to a Kronecker model but temporally uncorrelated...
上傳時間： 2013-12-20
上傳用戶：trepb001
資源簡介：C is a general-purpose programming language. It has been closely associated with the UNIX operating system where it was developed, since both the system and most of the programs that run on it are written in C. the language, however, is not...
上傳時間： 2014-01-14
上傳用戶：我干你啊
資源簡介：This project contains a C algorithm for calculating the results of a custom polynomial function. It is designed and optimized especially for the Starcore 140 DSP ! Inside the archive you can also find the assembly code and the matlab test ...
上傳時間： 2017-09-12
上傳用戶：hoperingcong
資源簡介：the first decision, that has to be made for the AVR platform, is to select the development environment you want to use, either ImageCraft s ICCAVR or GNU s AVR-GCC. the commercial ImageCraft Compiler offers an advanced IDE and is the fir...
上傳時間： 2017-04-21
上傳用戶：從此走出陰霾
資源簡介：-PID controller has been extensively used in the industrial world. But in this controller it is difficult to tune the PID gains. We apply the genetic algorithm(GA) to tune the PID gains. the GA is an optimization algorithm using the bioti...
上傳時間： 2014-01-07
上傳用戶：爺的氣質
資源簡介：matlab雨流算法。the rain flow algorithm code has been prepared according to the ASTM standard (Standard practices for cycle counting in fatigue analysis) and optimized considering the calculation time.
上傳時間： 2016-02-07
上傳用戶：上善若水
資源簡介：For this reason, iterative soft decoding has been studied to approach the optimal ML decoding performance at affordable complexity.
上傳時間： 2014-01-21
上傳用戶：evil
資源簡介：Blind Source Separation toolbox, This work has been partly funded by the European project BLIS (IST-1999-14190)
上傳時間： 2013-12-19
上傳用戶：koulian
資源簡介：the rapid growth of RFID use in various supply chain operations, which has arisen from the development of Electronic Product Code (EPC) technology, has created a need for the consideration of security issues in the adoption of that technolo...
上傳時間： 2020-06-08
上傳用戶：shancjb
資源簡介：A Design and Implementation of the Online Shopping System Abstract: Along with the development of the computer ,the database technique is widespread in the application of Internet, more and more , providing more thoughtful and humaniz...
上傳時間： 2014-12-04
上傳用戶：410805624
資源簡介：the BNL toolbox is a set of Matlab functions for defining and estimating the parameters of a Bayesian network for discrete variables in which the conditional probability tables are specified by logistic regression models. Logistic regress...
上傳時間： 2014-12-05
上傳用戶：天誠24
資源簡介：三維矢量有限元-矩量法電磁場分析程序。 EMAP5 is a full-wave electromagnetic field solver that combines the method of moments (MOM) with a vector finite element method (VFEM). It employs the finite element method (FEM) to analyze a dielectri...
上傳時間： 2016-04-03
上傳用戶：cylnpy
資源簡介：-the existence of numerous imaging modalities makes it possible to present different data present in different modalities together thus forming multimodal images. Component images forming multimodal images should be aligned, or registered s...
上傳時間： 2014-03-04
上傳用戶：15736969615
