基站

The power amplifiers,class A and AB,using power backoff scheme are difficult to meet the effiency requirement under the condiction of a high PAR,which cause a huge energy dissipation while producing a lot of heat.

以功率回退设计的A类或AB类功率放大器难以满足在高峰均比条件下的效率要求，造成了能量的巨大浪费，而且导致了严重的基站或直放站热管理问题，影响了系统性能，增加了制作成本。

Furthermore, a compound 802.1x and WEB authentication scheme is provided to ensures cryptographically protected access while preserving pre-existing public WLAN payment models.

提出了一种802.1X和WEB认证的混合型认证协议，该协议在进行WEB认证时将利用802.1X协商后产生的密钥进行，可有效的抵抗窃取服务、基站伪装、消息窃听等攻击，并与现有公共无线局域网Web认证相兼容。

Its very nature makes it an especially good leapfrogger: it works using radio, so there is no need to rely on physical infrastructure such as roads and phone wires; base-stations can be powered using their own generators in places where there is no electrical grid; and you do not have to be literate to use a phone, which is handy if your country's education system is in a mess.

正是它的那些特性使它成为一个很好的&跨越者&：它使用无线电工作，因此不需要依靠像道路和电话线一类的物理基础设施；在没有电力网络的地方基站能使用自己的发电机供电；而且你不需要受过很多教育才能使用一部电话，如果你的国家的教育系统很糟糕的话它就很有用。

The choice of Base Station is based on on-site reconnaissance, using GPS orientator, digital camera and other necessary appliance to collect and register data of every reference site.

无线基站站址采用现场勘测方式，携带GPS定位仪、数码相机等必要设备，对各参考站点进行数据采集并记录。

In chapter four, after analyzing the RF qualification, I design the receive scheme of RF and IF parts, and accomplish the choosing of chip and design of peripheric connection of chip.

第四章在分析CDMA基站仿真系统射频技术指标和要求的基础上，设计了射频、中频发射接收方案，并完成了芯片的选择和芯片外围连接设计。

A distributed secure clustering protocol is proposed, in which the secure network initialization, random number broadcast from the base station and one-way hash chain are used to achieve the resiliency against possible attacks including node personating, cluster-head occupying, malicious cluster-member recruiting and multiple cluster-membership attacks.

针对成簇协议所面临的各种安全威胁，提出了一种分布式安全成簇协议，通过网络安全初始化、可信基站的随机数广播和单向密钥链技术来有效地抵御节点伪装和簇首占据攻击、簇成员恶意征募攻击和多重簇成员身份攻击。

The sectored array antenna is applied to the base station of TD SCDMA.

该天线阵列用于TD SCDMA基站系统中。

Tiple screen forward diffraction loss for high base station antenna heights

向绕射损耗，而对较低的基站天线高度则采用基于测量的数据。

Based on the analysis to the architecture of current trunking system, a general design is presented in this dissertation. The principle and function features are also described in it.

本论文首先分析了现有集群系统的结构，在此基础上给出了一种可以实现的智能基站设计的总体方案，并对它的原理和功能特点做了总体上的描述。

A major challenge of the heterogeneous wireless networks is how to jointly utilize the resources of different radio access technologies in an efficient manner. Because of the different system capacities of BS/AP and ununiformity of traffic distribution in different cells, quantities of new calls may be blocked in the overloaded cell in some hot spots; whereas its neighboring under-loaded BS/AP have superfluous bandwidth. In order to raise resource utilization of heterogeneous networks, several novel load balancing strategies are proposed, which combine the call admission control and multi-hop routing protocol of ad-hoc network.

异构无线网络的主要挑战是如何高效利用各种接入网的无线资源，针对异构无线网络基站或AP的容量差异及业务分布不均，导致通信热点地区的新呼叫因负载过重大量阻塞，而相邻轻负载小区却有容量盈余的现象，本文提出了几种联合呼叫接纳控制及ad hoc网络多跳路由算法的负载均衡策略，以提高整个异构网络的资源利用率。

In the United States, chronic alcoholism and hepatitis C are the most common ones.

在美国，慢性酒精中毒，肝炎是最常见的。

If you have any questions, you can contact me anytime.

如果有任何问题，你可以随时联系我。