基于LAN的集群共网系统模型建立及性能分析

提出基于LAN平台上的集群共网系统方案模型,针对网络协议非实时性和集群系统业务实时性能的要求,在现有TCP／IP协议基础上,采用虚拟控制节点方案来调度实时业务．对建立的系统性能进行了仿真分析,得到了衡量系统性能的参数,用以作为基于LAN的集群共网系统的设计参考,为在目前的宽带网络上建立集群指挥系统提供设计依据．     

RLS算法智能天线空时联合均衡技术

建立了一种空时信号传输模型,分析对比了递归最小二乘(RLS)和最小均方误差(LMS)两种算法后,提出了一种基于RLS算法,由智能天线和时域均衡器组成的采用后馈滤波器的空时联合均衡器,仿真结果表明,在多径衰落信道下该方法能有效改善系统抗干扰能力,算法简单且易于实现。     

单/多信道通信系统中无线分站的单片微机控制

在DTMF信令的单/多信道通信系统中,利用单片微机技术和DTMF编/解码器,通过程序控制实现对无线电台分站的快速自动发码/解码、信道的扫描和转换、上线/折线、信令的存储与发射控制,实现了无线分站的自动入网。     

集群通信系统中电话接口技术的研究

集群通信系统中电话接口技术的研究哈尔滨工业大学王北松，徐玉滨，王斌，强蔚一、概述ＤＩＤ（ＤｉｒｅｃｔＩｎｗａｒｄＤｉａｌｉｎｇ）技术Ｂ吁Ｉ线用户直拨内线分机技术，它是指外线用户通过拨号的方式直接要通线路终端交换机所控制的某一分机，该项技术用于ＰＡＢＸ...     

Performance analysis of MC-2D-CDMA with orthogonal restore combination(ORC) over frequency selective channel

0　ＩＮＴＲＯＤＵＣＴＩＯＮＩｔｉｓｗｅｌｌｋｎｏｗｎｔｈａｔ 3Ｇｍｏｂｉｌｅｃｏｍｍｕｎｉｃａｔｉｏｎｓｙｓｔｅｍｃａｎｔｒａｎｓｍｉｔｍｕｌｔｉ ｍｅｄｉａｓｅｒｖｉｃｅ ,ｓｕｃｈａｓｖｏｉｃｅ ,ｄａｔａ ,ｖｉｄｅｏ ,ｂｕｔｔｈｅｔｒａｎｓｍｉｔｔｉｎｇｒａｔｅｉｓｓｌｏｗ .Ｏｎｔｈｅｂａｓｉｓｏｆ 3Ｇ ,ｔｈｅｎｅｘｔｇｅｎｅｒａｔｉｏｎｆｕｔｕｒｅｍｏｂｉｌｅｃｏｍｍｕｎｉｃａｔｉｏｎｓｙｓｔｅｍｓｈｏｕｌｄｐｒｏｖｉｄｅｉｎｔｅｒａｃｔｉｖｅｍｕｌ ｔｉ ｍｅｄｉａｓｅｒｖｉｃｅｓ ,ｓｕｃｈ…     

Analysis of Traffic Parameter Estimation and Its Impacts on Wireless Channel

Wide band or broadband access was paid much attention with the development of radio transmission technique. The wireless access control procedure play an important role in this type of system and efficiency of control algorithm has a great impact on throughput of channel resource. Based on wide band network control model and the characteristics of radio channel, this paper proposed a channel traffic estimation method and then performed a dynamic parameter control procedure and give detail analysis on estimation error and its impact on channel throughput and delay performance. Computation and simulation of system performance show a positive solntion on system design.     

The impact of hidden node on model of ad hoc network

To deal with hidden nodes in ad hoc network, we take throughput as the metric to evaluate the performance of network. Firstly, we modeled the MAC layer of ad hoc network based on 802.11 DCF without the existence of hidden nodes. By means of the proposed model, we evaluated the throughput performance of DCF in multi-hop wireless networks. Secondly, we performed simulations to validate this model. The outcome of comparison is that there exists much difference in throughput between the model and the simulation. For reducing this difference, we modified the model by involving hidden nodes under the condition that the AODV route protocol was chosen, and analytically analyzed the influence of hidden nodes on theoretical throughput. At last, we validated the accuracy of this model by comparing the analytical results with simulation results.     

I~2C总线器件与单片机接口技术应用

新型总线标准——Ｉ２Ｃ总线的优点、结构、时序和数据格式。以代表性器件ＡＴ２４Ｃ６４和ＰＣＤ３３１２Ｃ为例，描述单片机与它的接口和通信过程。     

无线通信系统中的交换网络设计

无线通信系统中的交换网络设计哈尔滨工业大学徐玉滨，强蔚，王北松，王斌一、概述随着计算机技术的广泛应用和微电子技术的不断发展；模拟开关阵列集成电路已被广泛应用干程控空分交换机中，从而替代了机电接点，推动了交换机向全电子化的过渡。由于模拟开关阵列集成电路...     

基于集群系统的开放频段调度通信系统

结合MPT-1327集群系统的平台和目前开放的409MHz频段,该文设计了一种基于MPT-1327信令集群系统的开放频段调度通信系统。此系统可以在小区域范围内完全自由通话,不必通过中继或基站系统。当有必要的时候,可以通过集群系统平台完成大范围的通信覆盖。这使得系统具有减少直接进入集群系统的业务量,且能完成非保密单位的普通调度指挥业务的优点。