Description: 本实验的内容是无线楼宇数据传输仿真，分析915M的楼宇通信特性，建立楼宇数据通信系统的仿真模型，采用无线收发芯片NRF905，依据其性能参数来判断楼宇内两点能否进行数据传输-the contents of this experiment is building wireless data transmission simulation, analysis 915M communications characteristics of the buildings, establishing building data communications system simulation models, the use of wireless transceiver chip NRF905. based on its performance parameters to judge whether two buildings for data transmission Platform: |
Size: 32768 |
Author:飘来的南风 |
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Description: 基于Ad Hoc 网络收发共享信道时分分配的无线传输机理,充分利用网络原有各类业务和
管理传输中的路由信息,提出了基于Hello 消息机制的AODV 改进路由协议,其将Hello 消息机制
的功能扩展到所有数据业务和控制消息的传输过程中. 经仿真研究分析表明,该协议不仅保持了
路由发现的性能,且显著提高了协议效率-Based on the Ad Hoc network to send and receive channel around the allocation of shared wireless transmission mechanism, make full use of various types of network operations and management of the original transmission of routing information, based on Hello message mechanism to improve the AODV routing protocol, it will Hello message mechanism function extended to all data and control information transfer process. by Simulation analysis showed that the agreement was found not only maintained a routing performance, and significantly improve the efficiency of an agreement Platform: |
Size: 187392 |
Author:xdb |
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Description: 无线网状网是一种高速率、高容量的多点对多点网络，可把它看成是Ad Hoc网络的简化版本。正如Ad Ho。网络一样，无线网状网中的路由是它的一项关键技术。基于此，本论文对无线网状网的路由协议进行研究。
文中首先介绍了无线网状网的结构，特点以及其发展与现状 其次，分析了Ad hoc网络中各种路由协议的优劣 再次，重点研究了其中的一种动态源路由协议(DSR)的具体实现过程 在DSR的基础上，对其进行改进，提出了一种均衡流量动态源路由协议，对它进行性能分析和仿真。-Wireless Mesh Network is a high-speed, high-capacity multi-point-to-multipoint network, it could be seen as Ad Hoc networks, a simplified version. As the Ad Ho. Networks, wireless mesh routing is a key technology. Based on this, the thesis of the wireless mesh routing protocol research. First, wireless mesh networks, introduced the structure, characteristics and status of its development and secondly, an analysis of Ad hoc network routing protocols in a variety of advantages and disadvantages again, focused on one of the Dynamic Source Routing Protocol (DSR) concrete realization of the process in DSR based on its improvement, a balanced flow of dynamic source routing protocol, its performance analysis and simulation. Platform: |
Size: 1958912 |
Author:诗圣 |
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Description: 摘要:基于通信技术的列车运行控制系统(CBTC)是铁路信号的发展方向，交频分复用
OFDM)是一种无线环境下的高速传输技术，它对高速列车控制信息传输中卞要受到的由于多
径传播引起的快衰落所产生的影响有很强的抵抗能力.本文首先介绍了OFDM技术的发展和
基本原理，然后在计算机上用M atlal〕对其性能进行了仿真，仿真中将OFDM与传统的单载波
调制方式—i1，交振幅调制( 1frQAM)对抗多径十扰的性能进行了比较，最后分析了一者的仿真结果.
-Abstract: Based on the communication technology train operation control system (CBTC) is a railway signal direction for the development of cross-frequency division multiplexing OFDM) is a wireless environment of high-speed transmission technology, its high-speed train control information transmission Bian be subject to the Due to the spread of multi-path fast fading caused by the impact of a strong resistance to diseases. This paper first introduces the OFDM technology development and the basic principles, and then on the computer〕 M atlal use its performance simulation will OFDM with the traditional single-carrier modulation-i1, cross-amplitude modulation (1frQAM) against multi-path interference of the 10 properties were compared with a final analysis of the simulation results. Platform: |
Size: 36864 |
Author:ma ming |
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Description: 本书介绍了LDPC码的编、译码基本原理及各种译码算法；详细分析了LDPC码的特点、分析方法；对无线移动通信信道模型下LDPC码的性能进行了剖析。各章原理的叙述力求突出概念清晰，注重理论推导和仿真试验验证相结合。
-The book introduced the provision of LDPC code, decoding the basic principles and various decoding algorithm a detailed analysis of the characteristics of LDPC code, analysis methods of wireless mobile communication channel model the performance of LDPC codes analyzed. Each chapter describes the principles sought to highlight the concept of clear, focused on theoretical derivation and simulation test to verify the combination. Platform: |
Size: 8413184 |
Author:libo |
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Description: 根据空时分组编码的特性及缺陷,考虑使用差分空时编码,该程序实现差分空时分组编码的性能仿真,是根据Space–Time Block Coding for Wireless一书的性能仿真-Space-time block coding according to the characteristics and defects, to consider the use of differential space-time coding, the program realize differential space-time block coding performance simulation is based on Space-Time Block Coding for Wireless book one of the performance simulation Platform: |
Size: 2048 |
Author:张靖悦 |
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Description: 一个cdma2000的系统仿真器，附英文手册-The cdma2000-UV Simulator estimates the performance of data transmissions at the physical layer
of the mobile communications technology cdma2000 1X. These wireless data transmissions enable
the communication between mobile stations (e.g., cellular phones, PDAs, laptops) and base
stations (i.e., the communication systems that provide network access to the final user). Examples
of these transmissions include voice, e-mails, and text messages. The simulation results are
calculated according to the simulation parameters set by the user. For example, the user may set a
non-moving mobile station in an indoor environment or a moving mobile station in a vehicular
environment. With the results obtained with the simulator, the user can perform different analyses
such as the degradation in system performance due to an increase of the number of mobile stations
or the effects of multipath channels on CDMA transmissions. Also, the cdma2000-UV Simulator
assists the user in understanding the Platform: |
Size: 10449920 |
Author:han |
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Description: 本程序对标准DCF算法进行仿真，然后提出提高无线接入点通信能力的DCF改进算法，并编写仿真程序。仿真结果证明改进算法可以大幅度提高网络整体性能。
-This procedure of standard DCF algorithm simulation, and then put forward to improve the communication capabilities of wireless access points, DCF improved algorithm and the preparation of simulation program. Simulation results show the improved algorithm can significantly improve the network overall performance. Platform: |
Size: 167936 |
Author:gudeyi |
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Description: OMNeT++ is an extensible, modular, component-based C++ simulation library and framework, with an Eclipse-based IDE and a graphical runtime environment. Domain-specific functionality (support for simulation of communication networks, queuing networks, performance evaluation, etc.) is provided by model frameworks, developed as independent projects. There are extensions for real-time simulation, network emulation, alternative programming languages (Java, C#), database integration, SystemC integration, and several other functions. Platform: |
Size: 313344 |
Author:Ahmed |
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Description: 本论文以OFDM系统为基础，介绍了OFDM系统的基本原理，以及使用OFDM技术的优势所在，并且展望了今后的无线移动技术的发展前景。在简单介绍OFDM原理的同时，着重阐述了OFDM系统在不同信道环境和不同实现方式下的误码性能。主要包括了OFDM系统在加性白高斯信道，在加性白高斯信道和多径干扰两种不同信道环境下系统的误码性能，其中后者还研究了系统在有保护间隔与无保护间隔的误码性能比较。在理论分析的基础上，用MATLAB进行仿真，最后做出误码性能的分析和比较。 -This paper has OFDM systems based on OFDM systems introduces the basic principles and the use of the advantages of OFDM technology, and to look towards the future of wireless mobile technology development prospects. In a brief OFDM principles, while focusing on the OFDM system under different channel environments and different modes to achieve the error performance. Mainly include the OFDM system in additive white Gaussian channel, in the additive white Gaussian channel and multi-path interference of two different channel environment, the system BER performance, the latter of which also studied the system in a guard interval and non-protected BER performance comparison interval. The theoretical basis of the analysis, using MATLAB simulation, finally make a bit error performance analysis and comparison. Platform: |
Size: 1953792 |
Author:王斌 |
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Description: 认知无线电是一种用于提高无线电通信频谱利用率的新的智能技术. 首先简述认知无线电的背景和概念,针
对认知无线电的频谱感知功能,详细地分析基于能量检测的频谱检测方法,在此基础上研究了噪声方差的不确定
性对检测性能的影响. 针对无线信号检测具有本地局域性和能量检测存在信噪比极限的特点,提出一种分布式有
限合作检测机制,推导出基于“OR”规则的有限合作机制的检测概率,并进行Monte Carlo仿真.-Cognitive radio is a radio communications spectrum used to improve the efficiency of the new smart technology. First, the background and outlined the concept of cognitive radio, spectrum sensing for cognitive radio capabilities, a detailed analysis of the spectrum based on energy detection test In this study the noise variance based on the uncertainty of the detection performance. for wireless signal detection with local detection of localized and there is signal to noise ratio limit of the energy characteristics of a distributed cooperative detection mechanism, derived out based on " OR" rules of the detection probability of the limited cooperation mechanism and conduct Monte Carlo simulation. Platform: |
Size: 183296 |
Author:林熙怡 |
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Description: Abstract: The optimal number of cluster heads is an important parameter of wireless sensor network performance. Network nodes will consume more energy if the number of cluster heads is too much or too little. This paper focuses on novel calculation method for ptimal number of cluster heads. Base on the analysis of LEACH energy dissipation model,novel lation method is derived from the total energy dissipation of a round. Simulation shows the
relationship of the optimal number of cluster heads, the number of frames in steady state phase and the distance between cluster heads and base station (BS).And it provides a theoretical basis for calculation of optimal number of cluster heads which can reduce
the energy consumption among nodes and achieves
an improvement on the network lifetime. Platform: |
Size: 260096 |
Author:Amir |
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Description: A multiple-input multiple-output (MIMO) communication system combined with the orthogonal frequency division multiplexing (OFDM) modulation technique can achieve reliable
high data rate transmission over broadband wireless channels. Channel state information for both single-input single-output (SISO) and MIMO systems based on pilot aided arrangement is
investigated in this paper. The estimation of channel at pilot frequencies with conventional Least Square (LS) and Minimum Mean Square (MMSE) estimation algorithms is carried out
through Matlab simulation. The performance of MIMO OFDM and SISO OFDM are evaluated on the basis of Bit Error Rate (BER) and Mean Square Error (MSE) level.-A multiple-input multiple-output (MIMO) communication system combined with the orthogonal frequency division multiplexing (OFDM) modulation technique can achieve reliable
high data rate transmission over broadband wireless channels. Channel state information for both single-input single-output (SISO) and MIMO systems based on pilot aided arrangement is
investigated in this paper. The estimation of channel at pilot frequencies with conventional Least Square (LS) and Minimum Mean Square (MMSE) estimation algorithms is carried out
through Matlab simulation. The performance of MIMO OFDM and SISO OFDM are evaluated on the basis of Bit Error Rate (BER) and Mean Square Error (MSE) level. Platform: |
Size: 729088 |
Author:loihuynh |
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Description: In this paper we simulate a multi-hop self-organizing wireless
sensor network. The purpose of the simulation is to investigate,
quantitatively, the performance of our self-organizing network
design. In particular, we examine such parameters as network
formation time, data packet delivery performance, throughput,
and device duty cycle. In addition, we analyze the impact of
MAC and low-duty cycle protocols. We demonstrate that our
tree network has the capability of automatic network formation,
update, and recovery. The design also supports simple address
assignments and straightforward routing. We discuss our
approach, OPNET simulation design, and simulation results Platform: |
Size: 191488 |
Author:Leontin |
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Description: The proposed routing protocol for Wireless Sensor Network is hierarchical and cluster based. The protocol supports mobility in the Sensor Nodes as well as in the Sink. The entire
protocol is described in terms of two phases namely Setup Phase and Data Forwarding Phase. After deployment of the Sensor Nodes entire sensor field in divided into some logical clusters and each cluster contains Sensor Nodes with different roles such as Gateway Node, Cluster Head Node and Ordinary Sensor Node.
Majority of the computation intensive tasks are carried out in the Sink. Simulation results show the energy efficiency of the proposed protocol. The performance of the proposed protocol
has been compared with that of CBR mobile WSN and results show better performance of the proposed protocol. Future scope of the work is outlined. Platform: |
Size: 718848 |
Author:Mohamed Rias |
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Description: 本文着重研究网络中使用的MAC协议对语音传输过程的影响，以及无线传
感器网络中适用的语音编码算法。本文首先综述了现有无线传感器网络中常用
的MAC协议，对这些协议进行了分析比较。提出了一种新的基于TDMA的MAC
协议VR-TDMA，为了测试提出的协议性能，在NS2仿真平台上对该协议进行
了仿真，结果证明该协议具有良好的实时性能。然后研究了几种常用语音编码
算法的性能，通过比较研究，认为ADPCM语音编码算法的性能符合无线传感
器网络应用的要求，并对该算法进行了简化，减少了算法运行的计算量。实际
测试表明，算法具有良好的性能。
-In this paper,we concentrate on the mac protocols of wireless sensor networks，
especially the impact imposed on speech transmition．We also want to find a speech
coder which is fit for wireless sensor networks．Firstly,we intorduce the existing mac
protocol，such aS IEEE802．1 1，SMAC protocol，TRAMA protocol，DMAC protoc01．
Moreover we analyse and make comparison of them．Secondly，we propose a new
mac protocol named VR-TDMA．Simulation in NS2 proves that this protocol Canhave pleasing performance in real．time application．Thirdly,we
make a comparison
of some famous speech encoders．The result indicates that ADPCM(Adaptive
Di脏rential Pulse Code Modulation)is simpler than advanced low bit。rate VOICe
coding techniques and doesn’t require as heavy caculations．In this work，We simplify
the algorithm in order tO make it fit for the networks beaer．Actual tests prove that
this simplified algorithm work well in wireless sensor networks． Platform: |
Size: 3294208 |
Author:曾晓丽 |
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Description: 本文主要通过对蜂窝无线通信系统信道、扇区化等的建模，使用MATLAB仿真实现对系统的中断概率的计算，并中断概率的大小分别作为衡量系统性能的标准。-This paper mainly modeled on the cellular wireless communication systems of channel, division of sectors and so on , by using the method of MATLAB, and realized to the calculation of blocking probability , and regarded the size of outage probability as a measure of system performance. Platform: |
Size: 2048 |
Author:李洋 |
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Description: 对研究无线传感器网络分簇算法有指导性的作用，包括算法仿真，性能分析，适用于科研目的和功能开发-Instructive to study wireless sensor network clustering algorithm, algorithm simulation, performance analysis, for research purposes, and functional development Platform: |
Size: 1801216 |
Author:鲁俊 |
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Search - wireless simulation performance