通信系统

In this thesis, first, we present the acquisition theory of conventional spreadspectrum communication system and the theory of SESS system.

本文首先对扩频通信系统编码同步的理论、自编码直接序列扩频通信的原理、自编码扩频序列的产生方法及其统计特性进行概述，然后详细讨论了自编码扩频通信的编码同步捕获问题。

With the development of digital communication, analog Trunked communi- cation system was being replaced by digital Trunked.

与其他通信系统一样，集群通信最初为模拟系统，并采用MPT-1327信令，而随着数字化的发展，模拟集群正逐步被数字集群所取代。

Currently there are two kinds of trunking communication systems: analog trunking system and digitaltrunking system.

当前的集群通信系统可以分为两类：模拟集群通信和数字集群通信。

Now , one of the direction of Trunking System is the trunking system which is based in CDMA technology and lies in traditional PUBLIC Digital Cellular Communication.

现在，集群移动通信的一个重要发展方向是在目前的公众蜂窝移动通信系统中，使用 CDMA 技术实现集群通信。

Trunking system is one kind of the advanced mobile dispatcher communication system. It represents the technical roadmap of dedicated mobile communication network.

集群通信系统，是一种高级移动调度系统，代表着通信体制之一的专用移动通信网发展方向。

DMR communication protocol is a new style international communication protocol applied to digital trunking communication systems.

摘 要：DMR通信协议是一个适用于数字集群通信系统的新型通信协议。

It is divided into three parts: In Part 1, based on mumerical simulations with the pseudo-spectral method, we introduced some new concepts such as the response speed of soliton interaction, the symbol correlation range, etc., and simplified the evolution problem of general soliton sequencies into the evolution problem of finite equivalent classes of words on a unoriented circle, and then gave out the count formula of the equivalent classes by Pó1ya theorem.

全文分三个部分：第一部分以利用拟谱方法所做的大量数值模拟为基础，分析光纤孤子通信系统中一般编码孤子序列的演化性质，提出孤子相互作用传递速度概念，通过考察通信系统的实际情况，引入码元关联长度K，把一般编码孤子序列的演化问题归结为无定向圆环上有限个不等价码字的演化问题，最后利用Pólya定理解决了不等价码字的计数问题。

This paper introduces the main function and feature of special software SystemView used for communication systems simulation,discusses its application on communication systems simulations,and investigates an example of communication system simulation basted on SystemView.

介绍了通信系统仿真专用软件工具 SystemView 的主要功能和特点，讨论了 SystemView 在通信系统仿真中的应用，给出了仿真和分析的具体实例

By using simulated annealing algorithm to mitigate the stress of culling in genetic algorithm and utilizing the Boltzmann mechanism of simulated annealing algorithm to control the acceptance of the individuals generated by copulated and varied, a CDMA multi-user detection method based on genetic annealing algorithm is adopted. The computer simulative experiment is conducted.

考虑到模拟退火算法和遗传算法各自的优缺点，将两者有效的结合起来，通过模拟退火算法来减轻遗传算法的选择压力，利用模拟退火算法的Boltzmann机制来接收交叉和变异后的个体，并且结合CDMA通信系统多用户检测的特点，采用了遗传退火算法对CDMA通信系统的多用户进行检测的研究。

This paper proposes a mixed Tor anonymous communication scheme, it effectively mixes Tor with Crowds anonymous communication system, makes use of each excellence sufficiently, and obviates the security problems, thus it is an efficient and safe anonymous communication scheme.

本文提出了一种混合的Tor匿名通信系统方案，它将Tor和Crowds匿名系统有效组合，充分发挥它们的优势，排除了Tor存在的安全问题，是一种高效、可靠的匿名通信方案。

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面，更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。