LTE系統(tǒng)與DTMB系統(tǒng)干擾共存研究
發(fā)布時間：2018-07-28 16:01
【摘要】：LTE (Long Term Evolution,長期演進)是3GPP制定的通用移動通信系統(tǒng)技術標準的長期演進。2013年10月我國工業(yè)和信息化部公布了2500MHz～2690MHz頻段為TDD方式的IMT系統(tǒng)工作頻譜,同時明確了在1800MHz到2100MHz頻段中未分配的兩個60MHz用于FDD頻段,2013年12月我國工業(yè)和信息化部正式向三大運營商發(fā)布了4G牌照,頻率劃分和運營牌照的發(fā)放將使得未來一段時間我國的LTE系統(tǒng)部署迎來一輪高潮。 2006年我國推出了具有自主知識產權的地面數字電視標準DTMB (Digital Television Terrestrial Multimedia Broadcasting,數字電視地面廣播),推動我國地面廣播電視由模擬電視向數字電視演進。得益于數字電視采用的一系列新技術,DTMB系統(tǒng)將會空出部分頻譜資源可供重新分配使用。 在LTE產業(yè)的發(fā)展過程中始終面臨頻譜資源不足的問題,特別是缺少有利于網絡覆蓋的低頻段頻譜。DTMB系統(tǒng)所在的VHF和UHF頻段相關的優(yōu)質頻譜受到越來越多的關注,LTE系統(tǒng)對與DTMB系統(tǒng)相關頻譜的需求使得兩個系統(tǒng)間的干擾共存問題具有重要價值和現實意義。 本文的主要研究工作圍繞LTE系統(tǒng)和DTMB系統(tǒng)的干擾共存問題展開,研究過程中首先采用確定性分析的方法進行LTE系統(tǒng)和DTMB系統(tǒng)間的共存研究,給出了分析過程中使用的系統(tǒng)建模過程,依據相關的系統(tǒng)保護原則確定了當系統(tǒng)處于鄰頻共存時的干擾情況和所需隔離程度。 在確定性分析的基礎上利用基于蒙特卡洛原理構建的系統(tǒng)級仿真,給出了農村和城市兩種場景下的系統(tǒng)干擾共存仿真結果。在此基礎上針對應用認知無線電技術利用DTMB系統(tǒng)頻譜空洞的問題,提出了結合地理位置數據庫應用GA算法利用空閑信道的方法,相關的仿真結果表明采用此方法可以改善系統(tǒng)間隔離要求,從而提高頻譜利用效率。本論文相關的研究結果可為未來LTE系統(tǒng)部署提供相關的參考依據。
[Abstract]:The long-term evolution of LTE (Long Term Evolution,) is the long-term evolution of the general mobile communication system technical standard established by 3GPP. In October 2013, China's Ministry of Industry and Information announced the working spectrum of IMT system with 2500MHz~2690MHz band as TDD mode. At the same time, it is clear that two 60MHz unallocated in the 1800MHz to 2100MHz band are used in the FDD band. In December 2013, the Ministry of Industry and Information Technology officially issued 4G licenses to the three major operators. The frequency division and the issuance of operating license will make the deployment of LTE system in our country a climax in the future. In 2006, China launched the terrestrial digital television standard DTMB (Digital Television Terrestrial Multimedia Broadcasting, which has its own intellectual property rights. Digital TV terrestrial broadcasting), promote the evolution of terrestrial radio and television from analog television to digital television. Thanks to a range of new technologies used in digital television, DTMB systems will free up some spectrum resources for redistribution. In the process of development of LTE industry, it is always faced with the problem of insufficient spectrum resources. In particular, the lack of low-frequency spectrum. DTMB system is in favor of network coverage. The high quality spectrum related to VHF and UHF band has attracted more and more attention. The demand of DTMB system for the spectrum related to DTMB system makes the interference between the two systems. Coexistence is of great value and practical significance. The main research work in this paper is focused on the coexistence of interference between LTE system and DTMB system. In the process of research, the coexistence between LTE system and DTMB system is studied by deterministic analysis method. The modeling process of the system used in the analysis process is given, and the interference situation and the required isolation degree when the system is in the coexistence of adjacent frequency is determined according to the relevant system protection principles. On the basis of deterministic analysis, the system level simulation based on Monte Carlo principle is used, and the simulation results of system interference coexistence in rural and urban scenarios are given. To solve the problem of using spectrum voids in DTMB system by using cognitive radio technology, a method of using free channel using GA algorithm based on geographical location database is proposed. The simulation results show that the proposed method can improve the isolation requirement and the spectral efficiency. The results of this paper can provide reference for the future deployment of LTE system.
【學位授予單位】：北京郵電大學
【學位級別】：碩士
【學位授予年份】：2014
【分類號】：TN929.5
本文編號：2150816
[Abstract]:The long-term evolution of LTE (Long Term Evolution,) is the long-term evolution of the general mobile communication system technical standard established by 3GPP. In October 2013, China's Ministry of Industry and Information announced the working spectrum of IMT system with 2500MHz~2690MHz band as TDD mode. At the same time, it is clear that two 60MHz unallocated in the 1800MHz to 2100MHz band are used in the FDD band. In December 2013, the Ministry of Industry and Information Technology officially issued 4G licenses to the three major operators. The frequency division and the issuance of operating license will make the deployment of LTE system in our country a climax in the future. In 2006, China launched the terrestrial digital television standard DTMB (Digital Television Terrestrial Multimedia Broadcasting, which has its own intellectual property rights. Digital TV terrestrial broadcasting), promote the evolution of terrestrial radio and television from analog television to digital television. Thanks to a range of new technologies used in digital television, DTMB systems will free up some spectrum resources for redistribution. In the process of development of LTE industry, it is always faced with the problem of insufficient spectrum resources. In particular, the lack of low-frequency spectrum. DTMB system is in favor of network coverage. The high quality spectrum related to VHF and UHF band has attracted more and more attention. The demand of DTMB system for the spectrum related to DTMB system makes the interference between the two systems. Coexistence is of great value and practical significance. The main research work in this paper is focused on the coexistence of interference between LTE system and DTMB system. In the process of research, the coexistence between LTE system and DTMB system is studied by deterministic analysis method. The modeling process of the system used in the analysis process is given, and the interference situation and the required isolation degree when the system is in the coexistence of adjacent frequency is determined according to the relevant system protection principles. On the basis of deterministic analysis, the system level simulation based on Monte Carlo principle is used, and the simulation results of system interference coexistence in rural and urban scenarios are given. To solve the problem of using spectrum voids in DTMB system by using cognitive radio technology, a method of using free channel using GA algorithm based on geographical location database is proposed. The simulation results show that the proposed method can improve the isolation requirement and the spectral efficiency. The results of this paper can provide reference for the future deployment of LTE system.
【學位授予單位】：北京郵電大學
【學位級別】：碩士
【學位授予年份】：2014
【分類號】：TN929.5
【共引文獻】
相關期刊論文 前4條
1 吳伯錦;;連續(xù)的電視圖像相似性比對技術[J];中國廣電技術文萃;2014年03期
2 朱家強;;模擬電視發(fā)射機數字化應考慮的幾個方面[J];科技視界;2014年27期
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相關碩士學位論文 前3條
1 黃剛林;基于SORA軟件無線電平臺DTMB接收技術的實現[D];武漢理工大學;2013年
2 王磊;DVB-T2中基于導頻的同步方法研究[D];西安電子科技大學;2014年
3 王麗華;基于CAZAC序列的OFDM同步符號設計[D];西安電子科技大學;2014年
，本文編號：2150816
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