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固定覆盖
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     Introduction to Large Area Fixed Reception of Digital Television Terrestrial Broadcasting
     地面数字电视大面积固定覆盖系统方案简介
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     Measurement of Automobile Outer Pancls by Fixed Sample Mould
     用固定样板模检测汽车覆盖
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     (2) fixation;
     (2)固定;
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     The experimental group used the transparent dressing while the control one used sterile gauze.
     无菌纱布组以传统的无菌纱布覆盖固定
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     An Analysis of the Depreciation of Fixed Assets
     浅析固定资产折旧
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     Wireless Covering in SOHO
     SOHO的无线覆盖
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  fixed coverage
For a fixed coverage c 1/L at low temperature two effects compete with each other.
      


According to the idea which the application of adaptive multi beam antennas in the mobile communication systems should be blended in well with cell configuration, a novel cell coverage strategy with synodical channel planning is proposed, in which the cluster cellular region are portioned into two region fixed coverage region with conservation reuse factor. And a dynamic coverage region with a more frequent reuse. And the dynamic coverage region is divided into circular multi layered zones by means of vertical...

According to the idea which the application of adaptive multi beam antennas in the mobile communication systems should be blended in well with cell configuration, a novel cell coverage strategy with synodical channel planning is proposed, in which the cluster cellular region are portioned into two region fixed coverage region with conservation reuse factor. And a dynamic coverage region with a more frequent reuse. And the dynamic coverage region is divided into circular multi layered zones by means of vertical splitting of radiation pattern of the multi beam base station antennas. A key performance factor is that the dynamic coverage region can improve the performance of carrier interference ratio and the flexibility of dynamic coverage range variation, which is illuminated by the numerical simulation results.

将自适应多波束天线与移动通信小区覆盖技术有机融合 ,提出了一种基于基站自适应多波束天线的动态覆盖方案。这一方案将一个传统的小区群覆盖结构分两个区域进行覆盖 ,其中一个区域为固定覆盖 ,另一部分则利用基站自适应多波束天线在垂直面将覆盖区域分割动态圆形分层小区。这一覆盖方案的重要特点在于有助于改善频率复用下载干比性能及动态覆盖的冗余度。计算机模拟结果证实了这一方案的可行性

In MEO satellite mobile communication systems,the confirmation of cell dwell duration' s distribution is very important to constitute handoff str ategies properly.In this paper,the reason of the difference between earth -fixed coverage and satellite -fixed coverage is pointe d out.Computation and simulation me thods,by which cell dwell duration c ould be obtained in satellite -fixed coverage instan ce,are provided,and numerical resu lts are obtained and compared with th at in earth -fixed coverage instance.

在MEO卫星移动通信系统中,确定小区驻留时间分布对于合理地规划切换策略具有十分重要的意义。指出了地球固定覆盖与卫星固定覆盖两种方式下小区驻留时间分布的不同原因。提出了计算和仿真卫星固定覆盖方式下小区驻留时间分布的方法,得出了数值结果,并与地球固定覆盖方式下的小区驻留时间分布进行了比较。

In MEO(Medium Earth Orbit)satellite mobile communication systems,the confirmation of cell dwell duration's distribution is very important to constitute handoff strategies properly.The reason of the difference between earth fixed coverage and satellite fixed coverage is pointed out.A simulation method by which cell dwell duration could be obtained in satellite fixed coverage instance is provided,and numerical results are obtained and compared with that in earth fixed coverage instance.

在中轨卫星移动通信系统中 ,确定小区驻留时间分布对于合理地规划切换策略具有十分重要的意义。文中指出了地球固定覆盖与卫星固定覆盖两种方式下小区驻留时间分布不同的原因。提出一种仿真计算卫星固定覆盖方式下小区驻留时间分布的方法 ,得出了数值结果 ,并与地球固定覆盖方式下的小区驻留时间分布作了比较

 
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