面向小包传输的通用滤波多载波复用技术研究
发布时间：2018-11-03 18:31
【摘要】：随着4G的商用,5G移动通信技术的研究已经提上日程并且成为国内外移动通信领域的研究热点。通用滤波多载波复用技术(Universal Filtered Multi-carrier Technique,UFMC)是5G中的热点候选波形技术,UFMC技术具有带外泄漏小,时频效率高等优势,被认为是可以替代正交频分复用技术(Orthogonal Frequency-Division Multiplexing,OFDM)的一种新波形。物联网以及机器类通信将在5G通信系统中扮演重要角色。与4G通信系统相比,5G系统拥有鲜明的特征,在5G中,将会出现大量机器之间的互连或者机器设备与人之间的互连。随着物联网的发展,小包通信得到学术界越来越多的关注,因此本文主要研究面向小包传输的通用滤波多载波复用技术。论文首先研究了 UFMC技术的基本原理,并且简要介绍了其它5G候选波形技术基于滤波器组的多载波波形(Filter Bank Multi-carrier,FBMC)和资源块滤波正交频分复用波形(Resource Block Filtered Orthogonal Frequency Division Multiplexing,RB-F-OFDM),然后论文从功率谱密度,误块率以及瞬时平均功率比等性能比较了 OFDM,FBMC,RB-F-OFDM 和 UFMC 技术。接着介绍了小包场景的搭建方法,通过理论分析可以看出当符号数较少时UFMC的时频效率高于OFDM和FBMC,因此UFMC技术是适用于小数据包传输的波形。为了解决小包场景中多用户的接收端检测问题,本文中提出了将波形UFMC 与频分多址(Frequency Division Multiple Access,FDMA),交织多址(Interleave Division Multiple Access,IDMA),稀疏码分多址接入(Sparse Code MultipleAccess,SCMA)进行结合,并且重点介绍了三种多址方式的系统原理。考虑到UFMC的瞬时平均功率比性能较差,所以本文提出了一种新的波形——离散傅里叶变换扩频的通用滤波多载波复用技术(Discrete Fourier Transform-Spread UFMC,DFT-S-UFMC)来改进 UFMC 的 IAPR 性能。本文给出了DFT-S-UFMC的系统模型以及算法实现,通过仿真可以看出DFT-S-UFMC的IAPR性能优于UFMC。最后介绍了小包场景中UFMC-IDMA和UFMC-SCMA系统的实现原理,并且搭建LTE链路级仿真平台比较了在小包场景下UFMC-FDMA,UFMC-IDMA和UFMC-SCMA的误块率性能,相同条件下仿真得出三种方式中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.
【学位授予单位】：北京交通大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TN929.5
本文编号：2308605
[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.
【学位授予单位】：北京交通大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TN929.5
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