【正文】 4G網(wǎng)絡(luò)通信新技術(shù)研究 I 4G 網(wǎng)絡(luò)新技術(shù)研究 摘要 摘要 ： 通信技術(shù)日新月異，給人們帶來不少享受。隨著數(shù)據(jù)通信與多媒體業(yè)務(wù)需求的發(fā)展，適應(yīng)移動數(shù)據(jù)、在我們還沒有完全享受 3G 移動通信系統(tǒng)商所帶來服務(wù)的同時 ,4G 移動通信技術(shù)的研究已經(jīng)在逐步的進行著。本文簡要分析了 :(1) 4G的網(wǎng)絡(luò)結(jié)構(gòu) 。(2) 4G 的關(guān)鍵技術(shù) ,如 OFDM,軟件無線電 ,智能天線技術(shù) ,MIMO 技術(shù)。(3) 比較了 3G 和 4G不同指標 ,分析了 3G 和 4G 采用的不同技術(shù)。 (4) 初步探討了4G 的現(xiàn)狀和發(fā)展。 關(guān)鍵詞 ： 4G，網(wǎng)絡(luò)通信 4G網(wǎng)絡(luò)通信新技術(shù)研究 II Abstract The munication technology advances, to bring a lot of enjoyment. With the demand for data munications and the development of multimedia services to meet the mobile data, as we have not fully enjoy the 3G mobile munication systems brought about by the service providers at the same time, 4G Mobile Communication Technology has been engaged in gradually. This paper analyzes: (1) 4G work structure。 (2) 4G key technologies such as OFDM, software radio, smart antenna technology, MIMO technology. (3) to pare the different indicators of 3G and 4G, 3G and 4G are analyzed using different techniques. (4) discussed the status and development of 4G. keywords： 4G, work munication 4G網(wǎng)絡(luò)通信新技術(shù)研究 III 目錄 摘要 ................................................................. I 目錄 ............................................................... III 前言 ................................................................. 1 第一章 4G 網(wǎng)絡(luò)結(jié)構(gòu) .................................................... 2 三層網(wǎng)絡(luò)結(jié)構(gòu) ..................................................................................................2 ..............................................................................................................2 第二章 4G 網(wǎng)絡(luò)中的關(guān)鍵技術(shù) ............................................ 4 OFDM ................................................................................................................4 .......................................................................................................4 智能天線技術(shù) (SA) ...........................................................................................4 多輸入多輸出 (MIMO)技術(shù) .................................................................................5 基于 IP的核心網(wǎng) .............................................................................................5 第三章 3G 與 4G 的比較 ................................................. 6 ..........................................................................................................6 ...................................................................................................6 ..........................................................................................................7 ..........................................................................................................7 4G是什么 .........................................................................................................8 4G會采用什么標準 ...........................................................................................9 4G手機怎么樣 ................................................................................................ 10 眾何時能用上 4G ......................................................................................... 11 4G會取代 3G嗎 .............................................................................................. 11 第四章 5 大 4G 標準 .................................................. 14 LTE ................................................................................................................ 14 LTEAdvanced ................................................................................................ 14 WiMax............................................................................................................. 15 HSPA+：高速下行鏈路分組接入技術(shù) ............................................................... 16 WirelessMANAdvanced .................................................................................. 16 第五章、 4G 的發(fā)展展望 ................................................ 18 ..................................................................................................... 18 ，一插即行 ....................................................................................... 18 ........................................................................................................ 19 4G的發(fā)展 ............................................................................................ 20 第六章 4G 的主要優(yōu)勢 ................................................. 27 ................................................................................................. 27 ................................................................................................. 27 4G網(wǎng)絡(luò)通信新技術(shù)研究 IV 性能更高 ................................................................................................. 28 .............................................................................................. 28 .......................................................................................... 28 ............................................................................ 28 .......................................................................................... 29 .......................................................................................... 29 第七章 4G 存在缺陷 ................................................... 30 ................................................................................................. 30 ................................................................................................. 30 ................................................................................................. 30 ................................................................................................. 31 ................................................................................................. 31 第八章 總結(jié) ......................................................... 33 參考文獻： .....................................................