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- In the long term perspective cellular systems,using a digital technology,will become the universal method of telecommunication. 展望未来,利用数字技术的蜂窝系统将成为通信的通用方式。
- To design a suitable CAC scheme for WCDMA cellular systems is important and necessary. 由此可知,设计WCDMA呼叫允诺控制方法对于通讯系统是相当重要的。
- Most cellular systems either use combined FDM/TDM or CDMA for sharing radio spectrum. 大多数蜂窝系统可以使用合并频/时分复用或CDMA共享无线电频谱。
- Promote the oxygen content of cellular system; expel toxicant and trash skin and face. 主要疗效:增强细胞组织含氧量,代谢清除阻塞物,平衡油脂分泌,收细毛孔,保湿。
- A new transmit diversity for a cellular system that a base station simultaneously communicates with N users is studied. 摘要研究了蜂窝通信系统中基站同时与N个移动用户通信时一种新的发送分集方法。
- The frequency planning for a cellular system enhanced with two-hop fixed relay nodes (FRNs) is investigated. 研究了两跳固定中继蜂窝网的频率规划问题。
- Issues explored include: the GPS dilemma, the International Space Station choices, commercial launch from foreign countries, and the fate of satellite-based cellular systems. 议题如下:gps(注:全球定位系统)两难矛盾处境,国际太空站的抉择,其他国家的商用卫星发射,以及卫星蜂巢式系统的命运。
- This paper presents an adaptive layer-selection strategy (ACLS) for hierarchical cellular systems with various multiple access schemes (TDMA/FDMA or CDMA). 本文提出了一种分层小区系统自适应控制择层策略,一个自适应门限和两个辅助门限被利用进行层选。
- Finally, to fully exploit the potentials of FRN enhanced cellular system, some performance enhancing techniques on BS-FRN links are indispensable. 研究结果还表明,为了充分发挥固定中继网络的潜力,有必要在固定中继节点与其所属基站链路上引入性能增强技术。
- Oxidative stress occurs in a cellular system when the production of free radical moieties exceeds the antioxidant capacity of that system. 当细胞内的自由基产物超出其自身的抗氧化能力时,便会产生氧化应激。
- A multicell adaptive resource allocation(MARA) scheme was proposed for downlink orthogonal frequency division multiple access(OFDMA) cellular system. 提出了一种用于正交频分多址通信系统下行链路的多小区自适应资源分配算法(MARA)。
- The key and crux to improve capacity of a cellular system is to abate the Co-Channel Interference (CCI) derived from frequency reuse. 提高蜂窝系统容量的关键和难点在于减小由频率复用产生的同频干扰。
- This paper proposes a novel orderly distributed hexangular cell system to introduce the gain of distributed system into the existing cellular system. 为了在现有的系统中引入分布式处理的增益,该文提出了有序分布的正六边形小区通信系统。
- Cellular system can be better explained in a new all-round way by the application of the tenet of materialist dialectics. 应用唯物辩证法系统论的原理可以对细胞系统做出更新、更全面的诠释。
- The author has described several key techniques for improving the capacity of CDMA digital celullar system,comparing to the spectral efficiency of FDMA and TDMA cellular system. 本文对照频分多址和时分多址系统的频谱效率,阐述了码分多址系统提高系统容量的几项关键技术。
- The Mobile Switching Center is sometimes called a mobile telephone switching office (MTSO), since it is responsible for connecting all mobiles to the PSTN in a cellular system. 由于这个移动交换中心负责一个蜂窝系统所有移动电话到PSTN的连接,因而有时又被称为移动电话交换局(MTSO)。
- The use of digital radio transmission and the advanced handover algorithms between radio cells in GSM networks allows for significantly better frequency usage than in analogue cellular systems,thus increasing the number of subscribers that can be served. GSM网络使用数线传输和先进的无线越区切换算法,可以得到比模拟蜂窝系统好得多的频率利用,因而增加了服务的用户数。
- The two systems of government are polar opposites. 这两种政体正好相反。
- This paper proposes a general model and approach to analyze the bidirectional call-overflow scheme for an arbitrary Hierarchical Cellular System (HCS) with N layers, as illustrated by a 4-layer HCS. 该文给出了N层蜂窝覆盖系统双向呼叫溢出信道指配策略的一般模型及分析方法,并给出了一个4层模型分析结果。
- With this it shows that this scheme accomplishes the mobile telephone relative position calculating using wireless cellular system, and will more perfectly acquire the absolute position of the mobile phone, so eventually complete the location tracing. 结果表明:该方案能通过无线蜂窝系统完成手机相对位置计算,并结合电子地图很好地得到手机的绝对位置,最终完成了定位跟踪。