Filtered-OFDM系统资源分配算法研究

发布时间：2018-05-11 18:57

本文选题：Filtered-OFDM + 资源分配　；参考：《西南交通大学》2017年硕士论文

【摘要】：第五代移动通信(The 5th Generation mobile communication,5G)技术是为满足当前社会通信需求而发展起来的新一代移动通信系统。5G在面对多样化业务类型、特定用户需求和低时延高可靠性等方面对下一代通信,尤其是无线通信多载波技术提出了巨大挑战。新型多载波Filtered-OFDM(F-OFDM)技术由于其技术特性能够根据实际业务场景来动态选择和配置不同波形参数而备受业界推崇,而5G技术与F-OFDM技术的结合必将衍生出多种应用场景,以满足众多垂直行业的多样化业务需求。基于未来特定业务需求,F-OFDM技术将现有系统频带划分为能够支持不同业务带宽和可靠性需求的子带,以此达到提升频谱利用率的目的。同时,资源分配作为F-OFDM系统的关键技术之一,算法的精度会影响甚至决定整个系统的性,因此如何根据不同用户的不同业务需求对资源进行分配以及如何配置软空口参数是一个急待解决的问题。本文主要针对F-OFDM系统下行链路的资源分配进行研究,并与OFDM系统进行对比分析。为了确定F-OFDM子带间的最优保护间隔,本文基于不同的子带保护间隔仿真分析了 F-OFDM系统的误码率性能,仿真结果表明在高阶调制时只需要添加3个子载波长度的保护间隔就能消除子带间的干扰,并与OFDM系统进行对比,且得出F-OFDM系统误码率性能更优。由于F-OFDM这一新型多载波技术的引入,系统中无线资源基本单元可以配置不同的波形参数,主要在帧结构的灵活设计、子载波映射以及引入子带滤波器的基础上,再借鉴经典的功率分配算法来进一步提高F-OFDM系统容量,因此,本文在F-OFDM下行链路基于不同信道模型,仿真分析了等功率分配算法、基本注水功率分配算法和注水功率分配算法三种资源分配算法对应的系统容量,仿真结果表明在不同信道模型下,F-OFDM系统采用注水功率分配算法时系统容量相对较优。
[Abstract]:The 5th Generation mobile communication 5G (5G) technology is a new generation mobile communication system developed to meet the needs of current social communication. The new generation of mobile communication system (.5G) is designed for the next generation communication in the face of diversified service types, specific user requirements and high reliability with low delay. In particular, the multi-carrier technology of wireless communication poses a great challenge. The new multi-carrier Filtered-OFDM F-OFDM (F-OFDM) technology is highly praised by the industry for its technical characteristics, which can dynamically select and configure different waveform parameters according to the actual business scenarios. However, the combination of 5G technology and F-OFDM technology will certainly lead to a variety of application scenarios. To meet the diversified business needs of many vertical industries. Based on the future specific service requirements, F-OFDM technology divides the existing system frequency band into sub-bands that can support different service bandwidth and reliability requirements, so as to improve the spectral efficiency. At the same time, as one of the key technologies of F-OFDM system, the accuracy of the algorithm will affect or even determine the whole system. Therefore, how to allocate resources according to the different business requirements of different users and how to configure the soft void parameters is an urgent problem to be solved. In this paper, the downlink resource allocation of F-OFDM system is studied and compared with OFDM system. In order to determine the optimal protection interval between sub-bands of F-OFDM, the BER performance of F-OFDM system is simulated and analyzed based on different sub-band protection intervals. The simulation results show that the inter-subband interference can be eliminated only by adding three sub-carrier length protection intervals in high-order modulation, and the BER performance of F-OFDM system is better than that of OFDM system. Because of the introduction of F-OFDM, a new type of multicarrier technology, the basic unit of wireless resources in the system can configure different waveform parameters, mainly based on the flexible design of frame structure, the subcarrier mapping and the introduction of sub-band filter. Then the classical power allocation algorithm is used for reference to further improve the capacity of F-OFDM system. Therefore, based on different channel models in the downlink of F-OFDM, the equal-power allocation algorithm is simulated and analyzed in this paper. The system capacity corresponding to the basic water injection power allocation algorithm and the water injection power allocation algorithm is compared. The simulation results show that the system capacity is relatively optimal when the water injection power allocation algorithm is used in the F-OFDM system under different channel models.
【学位授予单位】：西南交通大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TN929.5

【参考文献】