frequency reuse 中文意思是什麼
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Abstract : a new algorithm applied to the fixed channel assignment in the cellular pattern is proposed. it is based on the theory of evolutionary algorithm. it uses the concept of multiple reuse plan ( mrp ) and solve the problem of large scale through blocking algorithm, and it is a fast 、 efficient and parallel searching method. it has been used in frequency plan system of beijing university of posts and telecommunications. it has been used in several plan project for some city, and been adopted because of its good performance
文摘:提出了一種新的用於蜂窩移動通信中小區規劃的固定頻率分配演算法.它基於遺傳演算法的基本理論，運用多層頻率復用的概念和分塊演算法解決了大規模區域的頻率規劃問題，是一種快速、高效的并行式搜索的頻率分配演算法.該演算法已用於北京郵電大學的頻率規劃軟體系統中，並用它為幾個市區作過規劃，效果滿足要求，且已被采納 -
These developments will yield a cognitive radio able to sense its rf environment and location and then alter its power, frequency, modulation and other operating parameters so as to dynamically reuse whatever spectrum is available
以這些發展製作出來的感知無線電裝置，能感應所在的rf環境與地點，進而調整功率、頻率、調變及其他運作參數，以便靈活運用所有可用的頻譜。 -
The purpose of this web site is to share my experiences with workers in any country on water logging in agricultural lands, irrigation induced soil salinity, subsurface drainage for agriculture ( horizontal and vertical ), reuse of groundwater, ground - water hydraulics, ( geo ) hydrology, rainfall and surface runoff relations, reclamation and improvement of water logged saline, salty, sodic alkaline, and acid sulphate soils, plant growth, crop production and responses as well as statistical analysis consisting of segmented linear regression and cumulative frequency distributions
描述:探討農業耕地的水澇問題；灌溉導致的土壤鹽堿化；地表灌溉；地下水的再利用；地下水水力學；雨水與水流失的關系；淺地表排水；土壤開墾及水澇，酸性，堿性土壤的改良；片段線形回歸和累積頻數分佈的統計分析等。 -
In contrast, the gsm 1800 has richer frequency resources and usually uses the normal 4 x 3 frequency reuse mode
Gsm1800建設較晚，頻率資源相對豐富，通常採用常規的4 3頻率復用方式。 -
In order to increase the efficiency on using limited frequency resource, orthogonal polarization is normally adopted for frequency reuse, thus offering double bandwidth at the certain working band
為了充分利用有限的頻譜資源，衛星通信採用正交極化頻率復用方式，在給定的工作頻段上提供雙倍的使用帶寬。 -
In the initial stage, there were only gsm 900 networks. in order to provide higher wireless capacity, various frequency reuse technologies were used, including frequency hopping, mrp, iuo, etc. however, the higher the capacity, the more serious the interference
由於網路初期只有gsm900 ，為了提供更多的無線容量，採用了各種頻率復用技術，如跳頻、 mrp 、 iuo等方式，容量提高的同時也引入的更大的干擾。 -
Following the principle of reuse partitioning, two new frequency planning schemes are proposed, the coverage - oriented scheme and the efficiency - oriented scheme, for the cellular system with two - hop fixed relay nodes ( frns )
摘要根據復用分割原則，提出2種新的兩跳固定中繼蜂窩網的頻譜分配方案，即：側重於覆蓋面積的頻譜分配方案和側重於頻譜效率的頻譜分配方案。 -
In the gsm 1800 system, the 4 x 3 frequency allocation mode can meet the need, while in the gsm 900 network, the usual practice is that for the bcch carriers, the 4 x 3 reuse mode is used and for other channels, the 3 x 3 frequency hopping reuse mode is used
在gsm1800的系統中， 4 3的頻率分配方式能滿足需要，而在gsm900中，通常bcch載頻採用4 3復用方式，其它通道採用3 3跳頻復用方式。
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