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WCDMA分布式基站技术与应用 总被引:1,自引:0,他引:1
文章研究了WCDMA分布式基站的工程应用,通过干扰分析,对RRU的级联个数提出建议,并对RRU的拉远距离做了分析,最后总结了分布式基站的几个典型应用场景。分布式基站具有开放式模块化的特点,将步成为网络建设的主流。 相似文献
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移动网络分布式基站建设方案研究 总被引:1,自引:0,他引:1
随着基站选址难度的进一步加大,分布式基站应用逐步成熟,BBU集中和RRU拉远等基站建设方案使得无线接入网可以满足用户无所不在的移动宽带接入需求。从无线接入网发展趋势出发,介绍了分布式基站特点及组网方式等内容,分析了BBU集中建设模式和RRU拉远建设模式的主要驱动力和适用场景,并以两个案例对分布式基站建设案例进行分析总结,提出了分布式基站建设的相关建议,可为国内外电信运营商的无线接入网络建设提供参考。 相似文献
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浅谈移动通信基站防雷检测注意事项 总被引:2,自引:0,他引:2
根据《通信局(站)在用防雷系统的技术要求和检测方法》(YD/T1429-2006)、《通信局(站)防雷与接地工程设计规范》(YD5098-2005)等相关技术规范,通过对移动通信基站防雷装置的设计与施工特点进行分析;对其遭受雷击的典型事故进行总结;并结合多年来对移动通信基站进行防雷检测的工作经验,提出在对其进行防雷检测时应注意哪些问题,技术上如何进行把关,以防止和减少因防雷检测的疏忽而导致的雷击事故的发生。文中通过对移动通信基站日常检测中需要注意的"共用接地问题、接地电阻问题、线缆引入问题、等电位连接问题、SPD设置问题、接闪器保护范围问题"等六大问题进行分析与总结,便于有效地开展基站的防雷检测工作。 相似文献
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我国的移动基站防雷技术在社会经济与科技快速发展的双重作用下,得到了较大的进步.雷电对于电子器件高度集成、耐冲击性较差的通信基站来说,是主要危害之一,容易造成过电压雷击,导致通信设备损坏.对移动通信技术做好防雷技术保护,避免基站遭受雷击,降低感应雷击的危害位,是保证移动通信基站的正常运行以及移动客户良好使用效果的重要途径.针对使移动通信基站受到危害的雷电形式,设计良好的雷电防护技术,并在此基础上,浅谈对移动通信防雷设计的优化措施,进一步提高移动通信基站的防雷效果. 相似文献
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随着我国通信业的快速发展,通信基站数量越来越多、分布越来越广。由于基站自身的构造结构、设置的位置及电源、信号系统取线方式等原因,基站遭遇雷击的概率较大,因此,要加强通信基站的防雷保护工作。本文主要对通信基站防雷接地保护要点进行了分析与探讨,以供同仁参考。 相似文献
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分布式基站的基本结构与传统一体化基站有很大的不同,它将基站的基带部分(BBU/REC)和射频部分(RRU/RE/RRH)分离,分别作为单独的部分。这种分布式结构具有配置灵活、工程建设方便、环境适应性强等优点,应用越来越广泛。为了规范BBU和RRU之间的接口标准,CPRI(Common Public Radio Interface)协议应运而生。目前,CPRI接口的测试已经成为业界关注的焦点。R&S公司基于其强大的技术实力,于业界首先推出了基于CPRI接口的RRU和BBU测试解决方案,进一步完善了基站领域的测试需求,可以更好地为运营商、基站设备商、直放站厂商和检测机构提供相应的测试服务。 相似文献
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为提高四分之一波长微带线雷电保护器的带宽,降低输出残压,提出了分节微带线与串联电感的组合匹配设计方法. 仿真分析了四分之一波长微带线避雷器的不足,通过对分节微带线、串联电感的仿真优化,拓展了雷电保护电路的带宽,仿真结果表明防护电路在1 GHz到3 GHz内具有良好的电压驻波比即宽带特性. 利用电压梯度法实现器件间的组合匹配,防护电路实测结果表明,在注入组合波波形为1.2/50 μs & 8/20 μs,电压峰值为10 kV的雷电磁脉冲下,输出残压为79 V. 通过组合匹配方法设计的防护电路具有频带宽、残压低、易于调谐的特点,可用于天馈雷电防护. 相似文献
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Most modern aircraft are designed to withstand a direct lightning strike. To accomplish this protection, the aircraft must have an external conductive path with a given skin thickness and a minimum amount of exposed areas and antennas that could allow energy coupling to the inside. Additionally, some modern military aircraft are also designed to operate in a nuclear electromagnetic pulse (NEMP) environment. This paper provides experimental lightning data and NEMP scalemodel data to characterize both phenomena. The lightning data were obtained by measuring the surface electromagnetic fields on a CV-580 research aircraft during an actual lightning strike. The aircraft was struck by lightning 48 times in central Florida between 1500- and 18 000-ft altitude during the summers of 1984 and 1985. One of these lightning events, for which an extensive set of data was available, has been analyzed. For this event, the maximum measured values were as follows: time rate of change of the surface magnetic flux density, 3750 T/s; total normal current density, 20 A/m2; peak current, 4.7 kA; and rate of rise of the current, 38 kA/ps. The NEMP data were obtained by measuring the surface electromagnetic fields during a simulated NEMP test in a 1:74 scale model of the same aircraft. During scale-model NEMP simulation, the maximum values measured were as follows: time rate of change of the surface magnetic flux density, 40 000 T/s; and total normal current density, 90 A/m2. The analyses of these results should provide new insights for combined lightning and NEMP protection. 相似文献
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随着民航事业的快速发展,对于民航交通的安全性也提出了更高的要求.而雷击作为民航安全飞行中重要的因素之一,影响着民航系统的正常运行与导航性能.因此,提高民航通信导航系统的防雷能力,对于民航的安全飞行有着非常重要的意义.本文通过对民航通信导航系统中防雷与接地措施的分析,从而有效提高我国民航的通信质量与系统的稳定性. 相似文献
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电源监控系统防雷措施 总被引:4,自引:1,他引:3
根据雷击基本原理,分析电源监控系统在雷击中的损坏现象,提出电源监控系统的防雷措施,即在工程设计中引入防雷区的概念,在防雷区的交界处配置防雷器。简单介绍电源防雷器和信号防雷器的性能和安装,以及接地线阻抗的简单计算和正确选用,达到有效防雷。 相似文献
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During the 1968 and 1969 lightning seasons, member companies of the Telephone Association of Canada conducted a field investigation of lightning voltages induced in outside plant toll facilities at ten selected sites across Canada. Oscillograms of longitudinal surge voltages occurring in open wire, paired, and coaxial cable were continuously photographed with an automatic camera system especially developed for the investigation during each season. On completion, approximately 10 000 useful surge photographs were obtained and analyzed. The results indicate that a standard test wave, with 1000-V peak and10 times 1000-mu s waveshape, simulates 99.8 percent of the lightning surges encountered in paired and coaxial cables. For open wire circuits, a more suitable test wave with 2000-V peak amplitude and4 times 200-mu s waveshape is required to simulate 99.8 percent of the lightning surges. The number of surges per storm was found to be far higher than previously assumed. The highest recorded incidence during a storm was 484 surges greater than 10 V. Surge repetition intervals were short in all three types of facility; about 15 percent were less than 2 s. The surge information presented provides fundamental data on lightning surge effects in Canadian telephone plants which were previously unavailable. The assembled data will be of value to the protection engineer when designing future protection systems, and also to the transmission engineer concerned with noise problems. 相似文献
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光缆通信线路防雷设计与安装 总被引:4,自引:0,他引:4
胡红华 《光纤与电缆及其应用技术》2004,(4):37-39
根据雷电的形成过程和雷击大地时雷电流的分布规律,分析了光缆遭遇雷击的原因,提出了避开雷区、雷点,阻止光缆诱导雷电,引接雷电入地的光缆防雷设计思路,介绍了光缆的防雷设计与安装的方法。 相似文献
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针对污水处理厂易受雷击侵害的状况,根据雷电侵入的途径,分析了污水处理厂自控系统防雷隐患。通过对防雷设计中隔离、疏导、电源保护等几方面的论述,探讨如何建立自控系统综合防雷体系,以提高污水处理厂自控系统防雷能力。 相似文献