發(fā)布時間：2018-09-11 17:16

【摘要】：基于多天線技術(shù)的多輸入多輸出(MIMO)技術(shù)可以獲得較好的性能增益以及較高的頻帶利用率,因此引起了業(yè)界的廣泛關(guān)注。隨著城市建設(shè)和用戶數(shù)的增加,用戶密度已不再相等。對于城市密集區(qū),用戶數(shù)量和用戶業(yè)務(wù)明顯增多,每個小區(qū)內(nèi)要求被服務(wù)的用戶數(shù)也越來越多,傳統(tǒng)的二維(2D)天線配置已不能滿足用戶的需求,為此引入了三維(3D)陣列天線的設(shè)計,因此也就引入了3D MIMO系統(tǒng)及其相關(guān)技術(shù)。3D MIMO信道模型是評估3D MIMO相關(guān)技術(shù)的基礎(chǔ),3D波束賦型技術(shù)是3D MIMO通信系統(tǒng)傳輸關(guān)鍵技術(shù)之一,因此3D MIMO信道建模和3D波束賦型技術(shù)的實現(xiàn)是本文的主要研究內(nèi)容。 本論文的選題來源于2013年工業(yè)與信息化部電信研究院重大專項課題—《后IMT-Advanced移動通信技術(shù)及發(fā)展策略研究》和3GPP標準化工作項目。本課題通過參考3GPP R8、R9、R10、R11標準以及其他相關(guān)文獻,根據(jù)當前的技術(shù)發(fā)展,對3D MIMO的信道建模和3D波束賦型技術(shù)進行了研究和仿真評估,為LTE-A R12版本標準的制定提供有效的依據(jù)。 關(guān)于3D MIMO的信道建模的研究,本文根據(jù)2D MIMO信道模型,以及3D MIMO技術(shù)的應(yīng)用場景,提出3D MIMO信道建模的基本假設(shè),3D MIMO的建模流程,推導(dǎo)3D MIMO的簡化信道模型,并且對假設(shè)進行了仿真說明。關(guān)于3D波束賦型技術(shù)的研究,主要研究了3D波束賦型技術(shù)的優(yōu)勢,以及3D波束賦型技術(shù)在LTE-A系統(tǒng)中的具體實現(xiàn)方案。首先簡單分析了傳統(tǒng)波束賦型技術(shù)在應(yīng)用中存在的問題以及在LTE系統(tǒng)中的實現(xiàn)方案—基于有限反饋的波束賦形方案。然后通過原理分析,提出了3D波束賦型技術(shù)在LTE-A系統(tǒng)中的實現(xiàn)方案一基于有限反饋的雙碼本3D波束賦型方案,并且對方案進行了理論性能分析,實際仿真驗證,與其他一些假設(shè)方案進行了對比。最后得出了結(jié)論,針對3D MIMO系統(tǒng)的雙碼本波束賦型方案,能夠提高系統(tǒng)的性能,并且相對于其他假設(shè)方案具有優(yōu)勢。
[Abstract]:Multi-input multiple-output (MIMO) technology based on multi-antenna technology can obtain better performance gain and higher bandwidth efficiency, so it has attracted wide attention in the industry. With the increase of urban construction and the number of users, the user density is no longer equal. For the urban areas, the number of users and the number of users are increasing, and the number of users required to be served in each cell is increasing. The traditional two-dimensional (2D) antenna configuration can no longer meet the needs of users. For this reason, the design of 3D (3D) array antenna is introduced, so the 3D MIMO system and its related technology. 3D MIMO channel model is one of the key technologies of 3D MIMO communication system transmission. Therefore, 3D MIMO channel modeling and 3D beamforming technology are the main contents of this paper. The topic of this thesis comes from the major project of the Telecommunication Research Institute of the Ministry of Industry and Information Technology in 2013-"Research on the Mobile Communication Technology and Development Strategy after IMT-Advanced" and the 3GPP Standardization Project. By referring to the standard of 3GPP R8 / R9 / R10 / R11 and other related documents, according to the development of current technology, the channel modeling and 3D beamforming technology of 3D MIMO are studied and evaluated in this paper, which provides an effective basis for the formulation of LTE-A R12 version standard. Based on 2D MIMO channel model and 3D MIMO application scenario, the basic hypothesis of 3D MIMO channel modeling is presented in this paper, and the simplified channel model of 3D MIMO is deduced. The hypothesis is illustrated by simulation. On the research of 3D beam-matching technology, the advantages of 3D beam-matching technology and the realization scheme of 3D beam-matching technology in LTE-A system are mainly studied. Firstly, the problems existing in the application of traditional beam-matching technique and its implementation in LTE system are analyzed briefly, which is based on finite feedback beamforming scheme. Then, through the principle analysis, a 3D beam-matching scheme based on finite feedback is proposed in LTE-A system, and the theoretical performance of the scheme is analyzed and verified by simulation. It is compared with other hypothetical schemes. Finally, it is concluded that the dual-code beam-matching scheme for 3D MIMO system can improve the performance of the system, and has advantages over other hypothetical schemes.
【學(xué)位授予單位】：北京郵電大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2014
【分類號】：TN919.3

【參考文獻】

相關(guān)期刊論文 前1條

1 付景興,楊大成,常永宇;信道相關(guān)性對多入多出系統(tǒng)性能的影響[J];北京郵電大學(xué)學(xué)報;2003年01期

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本文編號：2237337