认知无线电中基于频谱聚合技术的频谱分配
发布时间：2018-11-17 13:47
【摘要】：无线通信领域的发展非常依赖于频谱资源的多少，改善频谱的使用方案是当下无线通信领域发展的主要内容。认知无线电技术从提出至今就被认为是改善频谱使用的最佳方案之一。而频谱聚合技术却又是近几年新兴的技术，它在频谱分配领域尤其独特的优势。在本文中将认知无线电技术和频谱聚合技术相结合在频谱分配方面体现出了很大的优势。 本文首先对认知无线电做了一个全面的介绍。然后进入本文的主要研究改善点中的第一部分：认知无线电的中频谱聚合技术的静态频谱分配算法，，静态频谱聚合技术的分配算法中，分别从认知用户数、频谱利用率、联合考虑认知用户数以及频谱利用率三个基本点进行了研究。 在静态频谱聚合技术实现频谱的分配当中，核心创新点在于将空闲的频谱碎片的组合最大化以及对于接入的认知用户进行博弈挑选，选择接入的用户必须和空闲的频谱碎片组合能够按照优化目标要求的方式进行结合达到研究需要优化的目标的目的。 本文的另一个核心研究内容为在频谱聚合技术下的动态频谱分配方面引入了频谱池系统，在NC-OFDM背景下，实现动态频谱的分配和管理。频谱池系统的引入解决了认知无线电技术在频谱分配领域面临的需要提高频谱利用率，减少认知用户传输过程中的频谱检测时间以及频谱使用中如何减少认知用户频谱切换的问题。 频谱池系统实现动态频谱的分配当中通过建立多级频谱池，并将频谱池进行优先级排序的方法，在授权用户和认知用户接入系统中时给予不同的接入方式的形式解决了认知无线电的频谱分配当中遇到的频谱切换次数高、用于频谱检测的时间长且频谱利用率的提高有限的问题。并通过仿真验证了频谱池分配方式相较于经典的即时接入方式具有较好的实验结果。 最后，本文对研究的核心内容做了一个基本的总结，并对未来的研究方向做了一个基本的展望。
[Abstract]:The development of wireless communication is very dependent on the number of spectrum resources. Improving the use of spectrum is the main content of the current wireless communication field. Cognitive radio technology has been considered to be one of the best ways to improve spectrum use since its inception. Spectrum polymerization is a new technology in recent years, and it has a unique advantage in spectrum allocation. In this paper, the combination of cognitive radio technology and spectrum aggregation technology shows a great advantage in spectrum allocation. This paper first gives a comprehensive introduction to cognitive radio. Then it enters the first part of the main research point of this paper: the static spectrum allocation algorithm of the cognitive radio technology, the static spectrum allocation algorithm of the static spectrum aggregation technology, the number of cognitive users, the spectrum utilization ratio, respectively. The cognitive users and spectrum efficiency are considered in this paper. In the static spectrum aggregation technology to achieve spectrum allocation, the core innovation is to maximize the combination of free spectrum fragments and game selection for access cognitive users. The user who chooses access must combine with the free spectrum fragment to achieve the goal of optimization. Another core of this paper is to introduce the spectrum pool system into the dynamic spectrum allocation under the technology of spectrum aggregation, and to realize the dynamic spectrum allocation and management under the background of NC-OFDM. The introduction of spectrum pool system solves the need of cognitive radio technology in the field of spectrum allocation to improve the spectrum efficiency. How to reduce spectrum detection time in cognitive user transmission and how to reduce spectrum switching in spectrum usage. The spectrum pool system realizes the dynamic spectrum allocation by establishing a multilevel spectrum pool and prioritizing the spectrum pool. Giving different access modes to authorized users and cognitive users in the system resolves the high frequency of spectrum switching encountered in the spectrum allocation of cognitive radio. The problem of long time for spectrum detection and limited improvement of spectrum efficiency. The simulation results show that the spectrum cell allocation method has better experimental results than the classical instant access method. Finally, this paper makes a basic summary of the core content of the research, and makes a basic outlook for the future research direction.
【学位授予单位】：哈尔滨工业大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TN925
本文编号：2338012
[Abstract]:The development of wireless communication is very dependent on the number of spectrum resources. Improving the use of spectrum is the main content of the current wireless communication field. Cognitive radio technology has been considered to be one of the best ways to improve spectrum use since its inception. Spectrum polymerization is a new technology in recent years, and it has a unique advantage in spectrum allocation. In this paper, the combination of cognitive radio technology and spectrum aggregation technology shows a great advantage in spectrum allocation. This paper first gives a comprehensive introduction to cognitive radio. Then it enters the first part of the main research point of this paper: the static spectrum allocation algorithm of the cognitive radio technology, the static spectrum allocation algorithm of the static spectrum aggregation technology, the number of cognitive users, the spectrum utilization ratio, respectively. The cognitive users and spectrum efficiency are considered in this paper. In the static spectrum aggregation technology to achieve spectrum allocation, the core innovation is to maximize the combination of free spectrum fragments and game selection for access cognitive users. The user who chooses access must combine with the free spectrum fragment to achieve the goal of optimization. Another core of this paper is to introduce the spectrum pool system into the dynamic spectrum allocation under the technology of spectrum aggregation, and to realize the dynamic spectrum allocation and management under the background of NC-OFDM. The introduction of spectrum pool system solves the need of cognitive radio technology in the field of spectrum allocation to improve the spectrum efficiency. How to reduce spectrum detection time in cognitive user transmission and how to reduce spectrum switching in spectrum usage. The spectrum pool system realizes the dynamic spectrum allocation by establishing a multilevel spectrum pool and prioritizing the spectrum pool. Giving different access modes to authorized users and cognitive users in the system resolves the high frequency of spectrum switching encountered in the spectrum allocation of cognitive radio. The problem of long time for spectrum detection and limited improvement of spectrum efficiency. The simulation results show that the spectrum cell allocation method has better experimental results than the classical instant access method. Finally, this paper makes a basic summary of the core content of the research, and makes a basic outlook for the future research direction.
【学位授予单位】：哈尔滨工业大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TN925
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本文编号：2338012
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