本文選題：TD-LTE + MIMO技術(shù)　； 參考：《武漢郵電科學(xué)研究院》2014年碩士論文

【摘要】：隨著移動(dòng)通信技術(shù)的發(fā)展，移動(dòng)通信的重點(diǎn)從語(yǔ)音業(yè)務(wù)模式逐步轉(zhuǎn)向數(shù)據(jù)業(yè)務(wù)傳輸。而隨著LTE時(shí)代的即將到來(lái)，移動(dòng)通信速率將得到極大的提升，視頻、游戲、流媒體等高速率的分組交換業(yè)務(wù)將成為人們?nèi)粘Ｊ褂檬謾C(jī)的主要業(yè)務(wù)。 有數(shù)據(jù)顯示，移動(dòng)通信網(wǎng)絡(luò)的業(yè)務(wù)量有70%發(fā)生在室內(nèi)，特別是對(duì)傳輸速率和穩(wěn)定性要求較高的分組數(shù)據(jù)業(yè)務(wù)。所以在引入TD-LTE網(wǎng)絡(luò)后，室內(nèi)分布系統(tǒng)建設(shè)是運(yùn)營(yíng)商的工作重點(diǎn)。為了保護(hù)運(yùn)營(yíng)商的前期投資，TD-LTE網(wǎng)絡(luò)的室內(nèi)分布建設(shè)要盡量使用現(xiàn)有室內(nèi)分布系統(tǒng)進(jìn)行改造。 TD-LTE系統(tǒng)使用的一個(gè)重要技術(shù)是多天線技術(shù)，即MIMO技術(shù)。而現(xiàn)有的室分系統(tǒng)為單饋線系統(tǒng)，無(wú)法實(shí)現(xiàn)TD-LTE系統(tǒng)的MIMO特性，對(duì)TD-LTE系統(tǒng)的容量和傳輸速率都有很大影響。若要在現(xiàn)有室分系統(tǒng)上改造實(shí)現(xiàn)TD-LTE系統(tǒng)的MIMO特性，最常規(guī)的方法是新建一路饋線系統(tǒng)，實(shí)現(xiàn)TD-LTE系統(tǒng)的雙路覆蓋。這種方案的缺點(diǎn)是改造成本較高、施工周期較長(zhǎng)和物業(yè)協(xié)調(diào)的難度較大。 本文提出了一種通過有源天線對(duì)現(xiàn)有的單饋線室內(nèi)分布系統(tǒng)改造的方法，并詳細(xì)介紹了有源天線的功能和設(shè)計(jì)方法。單纜MIMO有源天線分布系統(tǒng)是在單根饋纜上通過變頻方式實(shí)現(xiàn)TD-LTE系統(tǒng)MIMO功能的全新室內(nèi)分布系統(tǒng)，傳輸TD-LTE信號(hào)同時(shí)還兼容其他制式信號(hào)的透?jìng)鳌Ｍㄟ^在現(xiàn)有的單路室內(nèi)分布系統(tǒng)的基礎(chǔ)上加裝有源天線的近遠(yuǎn)端，使單路室內(nèi)分布系統(tǒng)可以在引入TD-LTE網(wǎng)絡(luò)后實(shí)現(xiàn)其MIMO特性。這種方式的改造周期短，改造難度較小，，成本較低，物業(yè)協(xié)調(diào)的難度較小。
[Abstract]:With the development of mobile communication technology, the emphasis of mobile communication is gradually shifting from voice service mode to data service transmission. With the coming of LTE era, mobile communication rate will be greatly improved, video, game, streaming media and other high-speed packet switching services will become the main business of people using mobile phones. Some data show that 70% of the traffic in mobile communication network occurs indoors, especially packet data services which require high transmission rate and stability. So after the introduction of TD-LTE network, the construction of indoor distribution system is the focus of operators. In order to protect the upfront investment of operators in the indoor distribution construction of TD-LTE networks, the existing indoor distribution systems should be reformed as far as possible. One of the most important technologies used in TD-LTE systems is multi-antenna technology, that is, MIMO technology. However, the existing system is a single-fed system, which can not realize the MIMO characteristics of TD-LTE system, which has great influence on the capacity and transmission rate of TD-LTE system. In order to improve the MIMO performance of TD-LTE system on the existing system, the most common method is to create a new one way feeder system to realize the dual coverage of TD-LTE system. The disadvantage of this scheme is that the cost of reconstruction is high, the construction period is longer and the coordination of property is difficult. In this paper, a method of transforming the existing single-fed indoor distribution system through active antenna is proposed, and the function and design method of active antenna are introduced in detail. Single cable MIMO active antenna distribution system is a new indoor distribution system which can realize MIMO function of TD-LTE system by frequency conversion on a single feed cable. The transmission of TD-LTE signal is compatible with the transmission of other standard signals at the same time. Based on the existing single-channel indoor distribution system, the MIMO characteristics of the single-channel indoor distribution system can be realized with the introduction of TD-LTE network by adding the near and far end of the active antenna. This type of transformation cycle is short, transformation difficulty is small, cost is lower, the difficulty of property coordination is small.
【學(xué)位授予單位】：武漢郵電科學(xué)研究院
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類號(hào)】：TN828.6

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