發(fā)布時間：2018-11-04 10:26

【摘要】：在長期演進(jìn)(Long Term Evolution,LTE)技術(shù)的上行系統(tǒng)中,過高的峰均功率比要求系統(tǒng)具有極高的設(shè)計復(fù)雜度來預(yù)防非線性失真,這就要求系統(tǒng)內(nèi)要擁有很大線性動態(tài)范圍的功率放大器等器件,這就會大大提高用戶終端的生產(chǎn)成本和削弱終端電池的續(xù)航能力,單載波頻分多址(Single-Carrier Frequency Division Multiple Access,SC-FDMA)系統(tǒng)是在正交頻分多址(Orthogonal Frequency Division Multiple Access,OFDMA)系統(tǒng)的基礎(chǔ)上發(fā)展演變而來,結(jié)合了單載波頻域均衡(Single-Carrier Frequency Domain Equalizer,SC-FDE)技術(shù)和OFDMA系統(tǒng)的優(yōu)點(diǎn),表現(xiàn)出單載波峰均功率比(Peak to Average Power Ratio,PAPR)極低的性質(zhì),成功的避免了上述問題,最終成為LTE上行鏈路所選擇的多址接入方案。本文主要就現(xiàn)代無線通信系統(tǒng)中單載波頻分多址系統(tǒng)的子載波分配模式,迫零(Zero Forcing,ZF),最小均方誤差(Minimum Mean Square Error,MMSE),判決反饋均衡(Decision Feedback Equalizer,DFE)以及Turbo均衡等檢測算法誤碼率性能,PAPR性能,帶外泄漏性能等方面進(jìn)行了研究和仿真。本文具體內(nèi)容安排如下:第一章介紹了LTE上下行系統(tǒng)的一些基本概念和原理,并給出了本文的主要內(nèi)容安排。第二章主要介紹SC-FDE技術(shù),給出其系統(tǒng)原理,并介紹幾種頻域均衡技術(shù),最后給出了SC-FDE系統(tǒng)頻域均衡算法仿真結(jié)果。第三章主要介紹SC-FDMA的系統(tǒng)原理,分別介紹SC-FDMA的三種分配模式,并詳細(xì)分析靈活性較高的新型塊交織頻分多址(Block-Interleaved Frequency Division Multiple Access,B-IFDMA)系統(tǒng),仿真用戶數(shù),塊子載波數(shù),交織程度對系統(tǒng)性能影響,給出三種單載波頻分多址系統(tǒng)結(jié)合ZF,MMSE和DFE以及Turbo均衡算法后的誤碼率性能仿真結(jié)果,最后還給出了集中式頻分多址(Localized Frequency Division Multiple Access,LFDMA)系統(tǒng)的兩種跳頻方法的系統(tǒng)原理和性能仿真結(jié)果。第四章重點(diǎn)研究了SC-FDMA系統(tǒng)的相關(guān)特性,包括三種分配模式下的PAPR,加頻率偏移性能仿真,并成功將N-continuous技術(shù)引用到SC-FDMA系統(tǒng)中,給出了優(yōu)化后的帶外泄漏性能和誤碼率(Bit Error Rate,BER)性能仿真結(jié)果。論文的最后一章是對本文貢獻(xiàn)的歸納,并給出后續(xù)研究工作的建議,分析未來SC-FDMA系統(tǒng)可能的研究方向。
[Abstract]:In the uplink system of long term evolving (Long Term Evolution,LTE, too high PAPR requires a high design complexity to prevent nonlinear distortion. This requires a large linear dynamic range of power amplifiers and other devices in the system, which will greatly increase the production cost of user terminals and weaken the terminal battery capacity, single carrier frequency division multiple access (Single-Carrier Frequency Division Multiple Access,) SC-FDMA) system is developed on the basis of orthogonal frequency division multiple access (Orthogonal Frequency Division Multiple Access,OFDMA) system. It combines the advantages of single carrier frequency domain equalization (Single-Carrier Frequency Domain Equalizer,SC-FDE) technology and OFDMA system. The PAPR (single carrier peak-to-average power ratio) (Peak to Average Power Ratio,PAPR) is very low, which avoids the problem mentioned above and becomes the multiple access scheme for LTE uplink. In this paper, the subcarrier allocation mode, zero forcing (Zero Forcing,ZF), minimum mean square error (Minimum Mean Square Error,MMSE) and decision feedback equalization (Decision Feedback Equalizer,) for single carrier frequency division multiple access systems in modern wireless communication systems are discussed. DFE), Turbo equalization and other detection algorithms, such as bit error rate (BER) performance, PAPR performance, out-of-band leakage performance and so on, are studied and simulated. The main contents of this paper are as follows: the first chapter introduces some basic concepts and principles of LTE uplink and downlink system, and gives the main contents of this paper. The second chapter mainly introduces the SC-FDE technology, gives the system principle, and introduces several frequency domain equalization techniques. Finally, the simulation results of the SC-FDE system frequency domain equalization algorithm are given. The third chapter mainly introduces the system principle of SC-FDMA, introduces the three distribution modes of SC-FDMA, and analyzes in detail the new block interleaving frequency division multiple access (Block-Interleaved Frequency Division Multiple Access,B-IFDMA) system with high flexibility and the number of simulation users. The number of block subcarriers and the degree of interleaving affect the performance of the system. The simulation results of BER performance of three single-carrier frequency division multiple access systems combined with ZF,MMSE, DFE and Turbo equalization algorithm are given. Finally, the centralized frequency division multiple access (Localized Frequency Division Multiple Access, is given. LFDMA) the system principle and performance simulation results of two frequency hopping methods. The fourth chapter focuses on the related characteristics of SC-FDMA system, including the simulation of PAPR, plus frequency offset performance under three allocation modes, and successfully applies N-continuous technology to SC-FDMA system. The simulation results of optimized out-of-band leakage performance and bit error rate (Bit Error Rate,BER) performance are given. The last chapter is a summary of the contribution of this paper, and gives some suggestions for further research work, and analyzes the possible research direction of SC-FDMA system in the future.
【學(xué)位授予單位】：電子科技大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2014
【分類號】：TN929.5

【相似文獻(xiàn)】

相關(guān)期刊論文 前10條

1 鄧兵;王旭;王紅星;毛忠陽;李相輝;;時相調(diào)制的頻分多址接入性能分析[J];電訊技術(shù);2012年04期

2 ;頻分多址 時分多址 碼分多址[J];中興新通訊;1999年06期

3 陳錫梅;劉毅敏;王宏維;;基于MATLAB頻分多址接入模型的仿真研究[J];武漢科技大學(xué)學(xué)報(自然科學(xué)版);2007年01期

4 馮干青;何海浪;;LTE的相關(guān)技術(shù)簡述[J];數(shù)字技術(shù)與應(yīng)用;2011年05期

5 趙琦;王海濤;鄒光南;;基于LTE的單載波頻分多址調(diào)制技術(shù)研究[J];電子設(shè)計工程;2011年04期

6 吳華榮;;LTE關(guān)鍵技術(shù)的研究[J];中山大學(xué)研究生學(xué)刊(自然科學(xué).醫(yī)學(xué)版);2010年04期

7 陳慧慧;鄭賓;;頻分多址接入模型設(shè)計及MATLAB仿真計算[J];山西電子技術(shù);2009年01期

8 姜文潮;;頻分多址按需分配信道的一點(diǎn)對多點(diǎn)通信系統(tǒng)[J];計算機(jī)與網(wǎng)絡(luò);1988年02期

9 章佳榮;喬鋼;張禹;孫微;;基于頻分多址的雙信道水聲通信網(wǎng)介質(zhì)訪問控制協(xié)議[J];應(yīng)用聲學(xué);2013年05期

10 霍亮;白劍林;張志峰;;試飛多目標(biāo)實(shí)時定位系統(tǒng)的設(shè)計與實(shí)現(xiàn)[J];指揮控制與仿真;2008年01期

相關(guān)碩士學(xué)位論文 前5條

1 嚴(yán)培;寬帶無線通信系統(tǒng)中的單載波頻分多址技術(shù)研究[D];電子科技大學(xué);2014年

2 嵇浩;LTE-Advanced中單載波頻分多址技術(shù)研究[D];南京郵電大學(xué);2011年

3 李陽;LTE上行單載波頻分多址技術(shù)仿真與研究[D];南京郵電大學(xué);2012年

4 潘仲夏;單載波頻分多址蜂窩系統(tǒng)的多用戶檢測技術(shù)研究[D];電子科技大學(xué);2011年

5 薛利軍;LTE上行關(guān)鍵技術(shù)的研究[D];西安科技大學(xué);2011年

，

本文編號：2309547