Carrier-phase synchronization can be approached in a general manner by estimating the multiplicative distortion (MD) to which a baseband received signal in an RF or coherent optical transmission system is subjected. This paper presents a unified modeling and estimation of the MD in finite-alphabet digital communication systems. A simple form of MD is the camer phase exp GO) which has to be estimated and compensated for in a coherent receiver. A more general case with fading must, however, allow for amplitude as well as phase variations of the MD. We assume a state-variable model for the MD and generally obtain a nonlinear estimation problem with additional randomly-varying system parameters such as received signal power, frequency offset, and Doppler spread. An extended Kalman filter is then applied as a near-optimal solution to the adaptive MD and channel parameter estimation problem. Examples are given to show the use and some advantages of this scheme.
标签： synchronization Carrier-phase multiplicativ approached
上传时间： 2013-11-28
上传用户：windwolf2000
An unsatisfactory property of particle filters is that they may become inefficient when the observation noise is low. In this paper we consider a simple-to-implement particle filter, called ‘LIS-based particle filter’, whose aim is to overcome the above mentioned weakness. LIS-based particle filters sample the particles in a two-stage process that uses information of the most recent observation, too. Experiments with the standard bearings-only tracking problem indicate that the proposed new particle filter method is indeed a viable alternative to other methods.
标签： unsatisfactory inefficient property particle
上传时间： 2014-01-11
上传用户：大三三
This book is an in-depth exploration into eVB s inherent features, and how to use them to solve likely mobile application programming tasks. After reading the book the reader will be able to write applications tackling a wide array of business problems for Windows CE-powered devices, both customized and for PocketPC and Handheld PC products. This book will help ease the transition into the language, and provide a reference for even more experienced developers.
标签： exploration in-depth features inherent
上传时间： 2013-12-12
上传用户：aa54
We have a group of N items (represented by integers from 1 to N), and we know that there is some total order defined for these items. You may assume that no two elements will be equal (for all a, b: a<b or b<a). However, it is expensive to compare two items. Your task is to make a number of comparisons, and then output the sorted order. The cost of determining if a < b is given by the bth integer of element a of costs (space delimited), which is the same as the ath integer of element b. Naturally, you will be judged on the total cost of the comparisons you make before outputting the sorted order. If your order is incorrect, you will receive a 0. Otherwise, your score will be opt/cost, where opt is the best cost anyone has achieved and cost is the total cost of the comparisons you make (so your score for a test case will be between 0 and 1). Your score for the problem will simply be the sum of your scores for the individual test cases.
标签： represented integers group items
上传时间： 2016-01-17
上传用户：jeffery
蚁群算法( ant colony algorithm) 是由意大利学者 Dorigo 等人[1 ,2 ] 于20 世纪90 年代初期通过模拟自然界 中蚂蚁集体寻径的行为而提出的一种基于种群的启发 式仿生进化系统。蚁群算法包含两个基本阶段:适应阶 段和协作阶段。在适应阶段,各候选解根据积累的信息 不断调整自身结构。在协作阶段,候选解之间通过信息 交流,以期望产生性能更好的解,这类似于学习自动机 的学习机制。蚁群算法最早成功应用于解决著名的旅 行商问题(t raveling salesman problem , TSP) ,该算法采 用了分布式正反馈并行计算机制,易于与其他方法结 合,而且具有较强的鲁棒性[325 ] 。 蚁群算法创立十多年来,无论在算法理论还是在算 法应用方面都取得了很多突破性研究进展。
标签： algorithm Dorigo colony ant
上传时间： 2016-01-18
上传用户：xyipie
这是一个模拟第3类模式地震波的matlab脚本。 This a collection of Matlab scripts that solve the antiplane (mode III) earthquake dynamic problem with slip-weakening friction, on a 1D fault embedded in a 2D homogeneous elastic unbounded medium. The problem is formulated as a boundary integral equation and the elastodynamic kernels are analytically derived in the spectral domain (spatial wavenumber). The method is explained e.g. by Morrysey and Geubelle (1997), and has been improved and extensively used by Nadia Lapusta, Alain Cochard, etc.
标签： collection antiplane scripts matlab
上传时间： 2013-12-26
上传用户：远远ssad
Software developers need to have a number of traits in order to practice their craft well. First, they must be good analytical thinkers and problem solvers. A developer’s primary role is to create software that solves business problems. This requires analyzing customer needs and coming up with successful, creative solutions.
标签： developers Software practice number
上传时间： 2014-06-01
上传用户：671145514
As all of you know, MATLAB is a powerful engineering language. Because of some limitation, some tasks take very long time to proceed. Also MATLAB is an interpreter not a compiler. For this reason, executing a MATLAB program (m file) is time consuming. For solving this problem, Mathworks provides us C Math Library or in common language, MATLAB API. A developer can employ these APIs to solve engineering problems very fast and easy. This article is about how can use these APIs.
标签： some engineering limitation language
上传时间： 2013-12-06
上传用户：huql11633
所有的设计模式都有一些常用的特性：一个标识（a name），一个问题陈述（a problem statement）和一个解决方案(a solution)。 1、一个设计模式的标识是重要的，因为它会让其他的程序员不用进行太深入的学习就能立刻理解你的代码的目的（至少通过这个标识程序员会很熟悉这个模式）。? 2、问题描述是用来说明这个模式的应用的领域。? 3、解决方案描述了这个模型的执行。一个好的设计模式的论述应该覆盖使用这个模型的优点和缺点。?
上传时间： 2013-12-16
上传用户：hfmm633
这是linux下的进化计算的源代码。 === === === === === === === === === === === ===== check latest news at http://eodev.sourceforge.net/ ======================================================================= Welcome to EO, the Evolving Objects library. The latest news about EO can be found on the sourceforge repository at http://eodev.sourceforge.net/ In case of any problem, please e-mail us at eodev-help@lists.sourceforge.net, eodev@egroups.com To get started, take a look at the tutorial, starting with ./tutorial/html/eoTutorial.html The easiest way to start programming a new genome with all EO evolution engines handy is to create a new standalone EO project from the tutorial/Templates/ directory. Read Lesson 5 of the tutorial for an introduction )
上传时间： 2013-12-23
上传用户：jkhjkh1982
