【摘要】：大規(guī)模天線(Massive multiple-input multiple output,Massive MIMO)和異構(gòu)網(wǎng)絡(luò)(Heterogeneous network,Het Nets)是第五代移動(dòng)通信系統(tǒng)(5G)中的兩種關(guān)鍵技術(shù),兩者的結(jié)合將會(huì)極大地提高移動(dòng)通信系統(tǒng)的性能與服務(wù)指標(biāo)。相比于傳統(tǒng)的MIMO異構(gòu)網(wǎng)絡(luò),大規(guī)模天線異構(gòu)網(wǎng)絡(luò)具有信道隨機(jī)性趨于穩(wěn)定、降低用戶間干擾及相關(guān)性、空間自由度高等特性。但是隨著異構(gòu)網(wǎng)絡(luò)中天線數(shù)目的增加,系統(tǒng)的能耗也隨之增加,尤其是在如今倡導(dǎo)綠色通信的背景下,能源效率成為了研究的熱點(diǎn)問題。本課題針對(duì)大規(guī)模天線異構(gòu)網(wǎng)絡(luò)系統(tǒng)的能效問題展開研究,主要研究內(nèi)容如下:首先,本文分析了大規(guī)模天線系統(tǒng)的網(wǎng)絡(luò)架構(gòu)和優(yōu)勢,介紹了幾種在大規(guī)模天線異構(gòu)網(wǎng)絡(luò)系統(tǒng)研究中的關(guān)鍵技術(shù)。為接下來對(duì)系統(tǒng)能源效率及其他性能的分析提供理論基礎(chǔ)。其次,在構(gòu)建的大規(guī)模天線異構(gòu)網(wǎng)絡(luò)多用戶場景中,本文針對(duì)大規(guī)模天線異構(gòu)網(wǎng)絡(luò)系統(tǒng)中的用戶集中區(qū)域(熱點(diǎn)區(qū)域)的能源效率問題進(jìn)行分析。利用大規(guī)模天線系統(tǒng)的空間性以及聯(lián)合空分復(fù)用(Joint Spatial Division Multiplexing,JSDM)技術(shù),在熱點(diǎn)區(qū)域構(gòu)建一環(huán)散射模型環(huán)境,并利用預(yù)編碼方案來消除宏蜂窩基站對(duì)熱點(diǎn)區(qū)域的干擾。運(yùn)用隨機(jī)矩陣?yán)碚?對(duì)熱點(diǎn)區(qū)域用戶下行鏈路的頻譜效率和能源效率進(jìn)行了分析,得到了系統(tǒng)能效的極限表達(dá)式。最后通過仿真得到了能源效率和基站天線數(shù)、基站發(fā)射功率的關(guān)系。最后,本文分析了在最大比傳輸預(yù)編碼和迫零預(yù)編碼算法下,大規(guī)模天線異構(gòu)網(wǎng)絡(luò)系統(tǒng)下行鏈路的能效問題,推導(dǎo)出兩種預(yù)編碼算法下的系統(tǒng)和速率,構(gòu)建系統(tǒng)功耗模型,定義了系統(tǒng)能效表達(dá)式。比較了在不同條件下,兩種預(yù)編碼方案對(duì)大規(guī)模天線異構(gòu)網(wǎng)絡(luò)系統(tǒng)能效的影響。
[Abstract]:Large-scale antenna (Massive multiple-input multiple output,Massive MIMO) and heterogeneous network (Heterogeneous network,Het Nets) are two key technologies in the fifth generation mobile communication system (5G). The combination of the two technologies will greatly improve the performance and service index of the mobile communication system. Compared with traditional MIMO heterogeneous networks, large scale antenna heterogeneous networks tend to stabilize channel randomness, reduce user interference and correlation, and have high spatial degree of freedom. However, with the increase of the number of antennas in heterogeneous networks, the energy consumption of the system also increases, especially in the context of green communication, energy efficiency has become a hot issue. The main contents of this paper are as follows: firstly, this paper analyzes the network architecture and advantages of large-scale antenna heterogeneous network system. This paper introduces several key technologies in the research of large-scale antenna heterogeneous network system. It provides a theoretical basis for the analysis of energy efficiency and other performance of the system. Secondly, in the multi-user scenario of large scale antenna heterogeneous network, this paper analyzes the energy efficiency of the user concentrated area (hot spot) in the large-scale antenna heterogeneous network system. Based on the spatial characteristics of large scale antenna system and the combined space division multiplexing (Joint Spatial Division Multiplexing,JSDM) technique, a ring scattering model environment is constructed in the hot spot region, and the interference of the macro cellular base station to the hot spot region is eliminated by using the precoding scheme. Based on stochastic matrix theory, spectrum efficiency and energy efficiency of downlink for users in hot spots are analyzed, and the limit expression of system energy efficiency is obtained. Finally, the energy efficiency, the number of base station antennas and the power of base station are obtained by simulation. Finally, this paper analyzes the downlink energy efficiency of large-scale antenna heterogeneous network systems under the maximum specific transmission precoding and zero-forcing precoding algorithms, deduces the system and rate under the two precoding algorithms, and constructs the power consumption model of the system. The expression of system energy efficiency is defined. The effects of two precoding schemes on the energy efficiency of large scale antenna heterogeneous network systems are compared under different conditions.
【學(xué)位授予單位】：華北電力大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：TN929.5

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