多对多通信

This paper analysis the performance of both slotted-ALOHA and ALOHA protocol.

然后通过对常见的时分多址无线通信协议的分析，给出了该系统通信协议的设计方案。

Then the process of developing automatic programming system of WEDM is presented .

对异构线切割机DNC通信的实现和多串口通信解决方案进行了详细的讨论。

Aiming at the limitation that IPSec multicast based on GDOI key management protocol is only applied to single-source multicast (one-to-many communication), this thesis proposes a scheme of multi-source multicast (many-to-many communication) of IPSec.

分析了基于GDOI组播密钥管理协议的IPSec安全多播目前只适用于单源多播的应用局限性，基于对IPSec协议及多播安全通信的研究，提出了一种IPSec多源多播的解决方案。

This invention relates to MIMO test method in a multi-user MIMO radio communication system including: estimating the channel matrixes of all users at the base station, computing an orthogonal projecting matrix M of the interference matrix of each user and transmitting M to each user periodically, receiving data sent by the base station at the user end and getting the orthogonal projecting matrix M from the received data, transforming the MIMO test of a desired user to the minimum value of a K-element secondary convex function, in which, K expresses the number of sending antennas and getting estimation of the test data by a ball test method.

一种多用户多输入多输出无线通信系统中的MIMO检测方法，包括步骤：在基站估计所有用户的信道矩阵；计算每个用户的干扰用户矩阵的正交投影矩阵M，并将每个用户的正交投影矩阵M定期发送给每个用户；在用户端接收基站发送的数据，并从接收的数据中得到正交投影矩阵M；利用正交投影矩阵M将期望用户的MIMO检测转化为K元二次凸函数的极小值，其中K表示对期望用户而言，发送天线的个数；利用球检测的方法，得到检测数据的估计。

A new type of point to multipoint communication system with switching capability is presented in this paper.

本文提出一种新型的具有交换功能的点对多点通信系统，给出了交换网络结构与控制系统设计方案，结合SCPB-TDM/TDMA多址方式和特定的系统传输帧结构设计，讨论分析了实现中心站和用户站两级交换控制所需解决的问题，包括信令系统、按需分配系统及话务容量分析等。

It realizes high-speed and selective action without the dependence on the submaster station, and shows more advantages than the centralized protection.

本文研究了几种当前流行的对等式通信方案，并对它们的可行性进行了比较。作者提出了网络式配电网保护的原理和逻辑算法，论证了算法的正确性，分别探讨了当配电网处于辐射状运行方式下和处于多电源并行供电方式下网络式保护的实现方案，并且在现有的硬件平台上进行了网络式保护控制装置的软件设计。

The system based on the CEBUS main line and using the wide frequency power line carrier communication technology to realize the multi- spots scene automatic monitor control, has realized the fire scene common control and the automatic fire fighting.

介绍了一种基于CEBUS总线的火灾预警系统，该系统基于CEBUS总线，并采用扩频电力线载波通信技术，实现了对多点现场的自动监测控制，实现了对火灾现场的集中控制和自动灭火。

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。

The apparatus comprises a first RF switch separating a received signal into N communication services; M diplexers associated with the communication services, for separating a signal received from the first RF switch into a call signal and a TV signal; a second RF switch for applying the TV signal received from the diplexers to a TV tuner; and a controller for controlling an overall operation of the multimode mobile phone and controlling the first RF switch and the second RF switch according to the received signal.

该设备包括第一射频开关，用于将所接收到的信号分离成N个通信服务；M个双工器，该M个双工器与通信服务相关，用于将从第一射频开关所接收到的信号分离成呼叫信号和电视信号；第二射频开关，用于将从双工器所接收到的TV信号提供给TV调谐器上；以及控制器，用于对多模式移动式电话的整个操作进行控制并且根据所接收到的信号来控制第一射频开关和第二射频开关。

And similarly the simulation results are presented. ABR congestion control under multicast communication environments is discussed in chapter six.

第六章讨论多点通信环境下的ABR拥塞控制机制，特别是点对多点的拥塞控制问题。

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。