【摘要】：隨著4G的商用,5G移動通信技術(shù)的研究已經(jīng)提上日程并且成為國內(nèi)外移動通信領(lǐng)域的研究熱點。通用濾波多載波復(fù)用技術(shù)(Universal Filtered Multi-carrier Technique,UFMC)是5G中的熱點候選波形技術(shù),UFMC技術(shù)具有帶外泄漏小,時頻效率高等優(yōu)勢,被認(rèn)為是可以替代正交頻分復(fù)用技術(shù)(Orthogonal Frequency-Division Multiplexing,OFDM)的一種新波形。物聯(lián)網(wǎng)以及機(jī)器類通信將在5G通信系統(tǒng)中扮演重要角色。與4G通信系統(tǒng)相比,5G系統(tǒng)擁有鮮明的特征,在5G中,將會出現(xiàn)大量機(jī)器之間的互連或者機(jī)器設(shè)備與人之間的互連。隨著物聯(lián)網(wǎng)的發(fā)展,小包通信得到學(xué)術(shù)界越來越多的關(guān)注,因此本文主要研究面向小包傳輸?shù)耐ㄓ脼V波多載波復(fù)用技術(shù)。論文首先研究了 UFMC技術(shù)的基本原理,并且簡要介紹了其它5G候選波形技術(shù)基于濾波器組的多載波波形(Filter Bank Multi-carrier,FBMC)和資源塊濾波正交頻分復(fù)用波形(Resource Block Filtered Orthogonal Frequency Division Multiplexing,RB-F-OFDM),然后論文從功率譜密度,誤塊率以及瞬時平均功率比等性能比較了 OFDM,FBMC,RB-F-OFDM 和 UFMC 技術(shù)。接著介紹了小包場景的搭建方法,通過理論分析可以看出當(dāng)符號數(shù)較少時UFMC的時頻效率高于OFDM和FBMC,因此UFMC技術(shù)是適用于小數(shù)據(jù)包傳輸?shù)牟ㄐ�。為了解決小包場景中多用戶的接收端檢測問題,本文中提出了將波形UFMC 與頻分多址(Frequency Division Multiple Access,FDMA),交織多址(Interleave Division Multiple Access,IDMA),稀疏碼分多址接入(Sparse Code MultipleAccess,SCMA)進(jìn)行結(jié)合,并且重點介紹了三種多址方式的系統(tǒng)原理�？紤]到UFMC的瞬時平均功率比性能較差,所以本文提出了一種新的波形——離散傅里葉變換擴(kuò)頻的通用濾波多載波復(fù)用技術(shù)(Discrete Fourier Transform-Spread UFMC,DFT-S-UFMC)來改進(jìn) UFMC 的 IAPR 性能。本文給出了DFT-S-UFMC的系統(tǒng)模型以及算法實現(xiàn),通過仿真可以看出DFT-S-UFMC的IAPR性能優(yōu)于UFMC。最后介紹了小包場景中UFMC-IDMA和UFMC-SCMA系統(tǒng)的實現(xiàn)原理,并且搭建LTE鏈路級仿真平臺比較了在小包場景下UFMC-FDMA,UFMC-IDMA和UFMC-SCMA的誤塊率性能,相同條件下仿真得出三種方式中UFMC-SCMA的BLER性能最好,UFMC-FDMA的BLER性能最差。
[Abstract]:With the commercialization of 4G, the research of 5G mobile communication technology has been put on the agenda and become the research hotspot in the field of mobile communication at home and abroad. General filtering multicarrier multiplexing (Universal Filtered Multi-carrier Technique,UFMC) is one of the hot candidate waveform technologies in 5G. UFMC is considered to be an alternative to orthogonal frequency division multiplexing (Orthogonal Frequency-Division Multiplexing,) because of its advantages of small out-of-band leakage and high time-frequency efficiency. A new waveform of OFDM. Internet of things and machine communication will play an important role in 5 G communication system. Compared with 4G communication system, 5G system has distinct characteristics. In 5G, there will be a large number of interconnections between machines or people. With the development of the Internet of things, packet communication has attracted more and more attention in academic circles. Therefore, this paper focuses on the general filtering multicarrier multiplexing technology for packet transmission. This paper first studies the basic principle of UFMC technology, and briefly introduces the other 5G candidate waveform technology based on filter bank multicarrier waveform (Filter Bank Multi-carrier,FBMC) and resource block filter orthogonal frequency division multiplexing waveform (Resource Block Filtered Orthogonal Frequency Division Multiplexing,. Then the OFDM,FBMC,RB-F-OFDM and UFMC techniques are compared in terms of power spectral density, block error rate and instantaneous average power ratio. Then it introduces the method of constructing the small packet scene. Through theoretical analysis we can see that the time-frequency efficiency of UFMC is higher than that of OFDM and FBMC, when the number of symbols is small. Therefore UFMC technology is suitable for small packet transmission waveform. In order to solve the problem of multi-user detection in packet scenario, this paper proposes that the waveform UFMC and frequency division multiple access (Frequency Division Multiple Access,FDMA), interleaved multiple access (Interleave Division Multiple Access,IDMA), sparse code division multiple access (Sparse Code MultipleAccess,), and sparse code division multiple access (Sparse Code MultipleAccess,) are proposed in this paper. SCMA), and introduces the system principle of three kinds of multiple access mode. Considering the poor instantaneous average power ratio (IAPR) performance of UFMC, this paper proposes a new waveform, (Discrete Fourier Transform-Spread UFMC,DFT-S-UFMC (Universal filter Multiplexing technique of discrete Fourier transform spread Spectrum), to improve the IAPR performance of UFMC. In this paper, the system model and algorithm implementation of DFT-S-UFMC are given. The simulation results show that the IAPR performance of DFT-S-UFMC is better than that of UFMC.. Finally, the implementation principle of UFMC-IDMA and UFMC-SCMA system in packet scenario is introduced, and LTE link-level simulation platform is built to compare the performance of UFMC-FDMA,UFMC-IDMA and UFMC-SCMA in packet scenario. Under the same conditions, the BLER performance of UFMC-SCMA is the best, and the BLER performance of UFMC-FDMA is the worst.
【學(xué)位授予單位】：北京交通大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：TN929.5

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本文編號：2308605