移動通信系統的頻率分配算法設計

電子通信論文編號:TX168 附開題報告,任務書,及前期過程資料,論文字數:18822,頁數:43 

 目   錄

1 緒論 ………………………………………………………………………………………1
2 移動通信簡介 ……………………………………………………………………………1
2.1 蜂窩小區形狀與結構 …………………………………………………………………1
2.2 信道分配策略 …………………………………………………………………………3
2.3 多址技術 ………………………………………………………………………………4
2.4 頻率復用 ………………………………………………………………………………6
3 算法設計方案 ……………………………………………………………………………7
3.1 蜂窩小區初始布局 ……………………………………………………………………8
3.2 電磁兼容性分析 ………………………………………………………………………10
3.3 頻道向量 ………………………………………………………………………………13
3.4 頻率分配原則 …………………………………………………………………………16
4 頻率算法實現 ……………………………………………………………………………16
4.1 小區規劃 ………………………………………………………………………………17
4.2 電磁兼容設計 …………………………………………………………………………18
4.3頻道向量設計 …………………………………………………………………………20
4.4頻率分配流程 …………………………………………………………………………21
5 C++程序設計………………………………………………………………………………24
5.1 C++語言概述 …………………………………………………………………………24
5.2 C++源代碼 ……………………………………………………………………………28
6 實驗結果 …………………………………………………………………………………29
結論 …………………………………………………………………………………………31
致謝 …………………………………………………………………………………………32
參考文獻 ……………………………………………………………………………………33

附錄A頻率分配算法的C++源代碼 …………………………………………………………35

摘要
    由于無線用戶的劇增，頻率規劃成為移動網絡的一大難題。通過對現有移動通信系統的分析，設計出一種適用于中小型系統的頻率分配算法。算法通過規劃通信系統的小區初始布局，確定小區頻道電磁兼容關系；運用動態的系數最小居后法，對頻率電磁兼容矩陣進行分析計算，得到各個頻道的分配難度系數，并按照“先難后易”的原則，將頻率分配給各個頻道。其中，重點分析了頻率分配的具體設計方案，以及電磁兼容對同頻干擾和鄰頻干擾的限制。算法最終采用C++編程經過調試，實現了對12個小區的固定分組的頻率分配。經分析算法思路清晰，可以完成其他中小型系統的全局優化。

關鍵詞  頻率分配  電磁兼容  同頻干擾  鄰頻干擾 

Title    Frequency Assignment Arithmetic Design in Mobile
         Telecommunication System                       

Abstract
Because the number of wireless customers is increasing rapidly, frequency programming becomes a great hard nut to the mobile network. By analyzing the current mobile communication system, a frequency assignment arithmetic has been designed, which is applicable to small or medium scaled system. After layout the distribution of cells of mobile system, we obtain the electro magnetic compatibility relationship of cell channels; by using a method called dynamic state of minimum coefficient behind, we analyze and calculate the electro magnetic compatibility of frequency to get the difficulty coefficient of each channel. Then according to the principle of "first difficult, latter easy", the frequency is distributed to each channel. Among them, concrete design project of frequency allotment has been analyzed, and the limitation that the electro magnetic compatibility brings to both the same frequency interference and the adjacent frequency interference. Arithmetic adopts C++ to programme and debug, which realize fix frequency allotment for 12 small cells. Through the analysis, it tells us that the way of this arithmetic is in focus, and it could accomplish the overall situation optimization of other small or medium scaled system.

Key Words  frequency assignment  electro magnetic compatibility  the same frequency interference  the adjacent frequency interference