本文選題：分布式天線 + 協(xié)作多點傳輸�。� 參考：《東南大學(xué)》2016年碩士論文

【摘要】：隨著移動互聯(lián)網(wǎng)的快速發(fā)展和智能終端的大量普及,各種多媒體業(yè)務(wù)如網(wǎng)頁瀏覽、社交網(wǎng)絡(luò)、手機(jī)游戲、電子商務(wù)和高清視頻等的相繼涌現(xiàn),人們對移動通信系統(tǒng)的速率和質(zhì)量等提出了更高的要求和挑戰(zhàn)。分布式天線技術(shù)可以有效地提高通信系統(tǒng)的容量和頻譜利用率,已經(jīng)成為未來移動通信系統(tǒng)的重要候選技術(shù),以分布式天線為基礎(chǔ)的協(xié)作多點傳輸技術(shù)已經(jīng)被LTE-Advanced和802.11m標(biāo)準(zhǔn)所采納。本文主要對分布式天線系統(tǒng)下行鏈路預(yù)編碼技術(shù)進(jìn)行了研究。首先,本文介紹了MIMO多天線技術(shù)和分布式天線技術(shù)的基本原理,概述了分布式天線系統(tǒng)的研究進(jìn)展和多用戶下行鏈路預(yù)編碼技術(shù)。其次,本文研究了分布式天線系統(tǒng)的信道模型和相關(guān)性能。本文將MIMO多天線技術(shù)與分布式天線技術(shù)相結(jié)合,在對分布式天線系統(tǒng)信道建模的基礎(chǔ)上,重點分析和研究了分布式天線系統(tǒng)的覆蓋特性和信道容量。仿真結(jié)果表明,分布式天線系統(tǒng)比集中式天線系統(tǒng)具有更好的覆蓋和信道容量性能。然后,本文研究了單小區(qū)分布式天線系統(tǒng)下行鏈路預(yù)編碼技術(shù)。本文在分析傳統(tǒng)經(jīng)典的多用戶預(yù)編碼算法的基礎(chǔ)上,提出了一種基于信漏噪比和信干噪比準(zhǔn)則的收發(fā)聯(lián)合優(yōu)化算法及其加權(quán)算法,推導(dǎo)了最優(yōu)預(yù)編碼向量和接收合并向量的表達(dá)式。仿真結(jié)果表明,本文提出的改進(jìn)算法能夠有效提高系統(tǒng)的平均數(shù)據(jù)速率和平均誤符號率性能。最后,本文研究了多小區(qū)分布式天線系統(tǒng)下行鏈路預(yù)編碼技術(shù)。本文將協(xié)作多點傳輸技術(shù)與分布式天線技術(shù)相結(jié)合,針對多小區(qū)分布式天線協(xié)作系統(tǒng),提出了一種基于用戶位置的選擇性協(xié)作傳輸方案,并通過在給定的接收信噪比約束條件下最小化系統(tǒng)的總發(fā)射功率來進(jìn)行預(yù)編碼設(shè)計。仿真結(jié)果表明,本文所提方案能夠在系統(tǒng)發(fā)射功率和協(xié)作小區(qū)的信息交互之間取得折中。
[Abstract]:With the rapid development of mobile Internet and the popularity of intelligent terminals, various multimedia services such as web browsing, social networks, mobile games, e-commerce and high-definition video have emerged one after another. People put forward higher request and challenge to the rate and quality of mobile communication system. Distributed antenna technology can effectively improve the capacity and spectrum efficiency of communication systems, and has become an important candidate technology for mobile communication systems in the future. Cooperative multipoint transmission based on distributed antennas has been adopted by LTE-Advanced and 802.11m standards. In this paper, the downlink precoding technology of distributed antenna system is studied. Firstly, this paper introduces the basic principles of MIMO multi-antenna technology and distributed antenna technology, and summarizes the research progress of distributed antenna system and multi-user downlink precoding technology. Secondly, the channel model and related performance of distributed antenna system are studied. In this paper, MIMO multi-antenna technology and distributed antenna technology are combined. Based on the channel modeling of distributed antenna system, the coverage characteristics and channel capacity of distributed antenna system are analyzed and studied. The simulation results show that the distributed antenna system has better coverage and channel capacity performance than the centralized antenna system. Then, the downlink precoding technology of single cell distributed antenna system is studied. Based on the analysis of the classical multiuser precoding algorithm, this paper presents a new algorithm based on SINR and SINR criterion and its weighting algorithm. The expressions of the optimal precoding vector and the reception merge vector are derived. Simulation results show that the proposed improved algorithm can effectively improve the performance of the average data rate and the average symbol error rate of the system. Finally, the downlink precoding technology of multi-cell distributed antenna system is studied. In this paper, we combine cooperative multi-point transmission technology with distributed antenna technology, and propose a selective cooperative transmission scheme based on user location for multi-cell distributed antenna cooperative system. The precoding design is carried out by minimizing the total transmit power of the system under the given SNR constraints. The simulation results show that the proposed scheme can achieve a compromise between the transmission power of the system and the information interaction of the cooperative cell.
【學(xué)位授予單位】：東南大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2016
【分類號】：TN929.5

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本文編號：1990081