论文部分内容阅读
IEEE802.22工作组的工作范围是对工作在54～862MHz的VHF/UHFTV频带内的固定点对多点无线区域网(WRAN)制定基于认知无线电的空中接口。频谱资源分配是WRAN中的关键技术,目前对认知无线电的频谱分配算法的研究多集中在比较广义的范围,对WRAN等具体系统的频谱分配研究较少。根据WRAN的特点和OFDM的传输特性,提出一种OFDM多用户资源分配算法:多载波比例公平算法(MPF)和最大化吞吐量算法(KH)的组合算法(KH&MPF),该算法将最大化吞吐量算法和多载波比例公平算法进行优势互补,得到公平性和吞吐量都次优的结果,解决用户之间的公平性问题,考虑用户的Qos要求。最后对该算法进行仿真。
The working group of IEEE802.22 working group is to make cognitive radio-based air interface to fixed point to multipoint wireless area network (WRAN) operating in 54- 862MHz VHF / UHFTV frequency band. Spectrum resource allocation is a key technology in WRAN. At present, the research on spectrum allocation algorithms of cognitive radio mostly concentrates on a broader scope, and there are few researches on spectrum allocation of WRAN and other specific systems. According to the characteristics of WRAN and the transmission characteristics of OFDM, a multi-user resource allocation algorithm for OFDM is proposed: the combinatorial algorithm (KH & MPF) of Multi-Carrier Proportional Fairness Algorithm (MPF) and Maximum Throughput Algorithm (KH) Quantity algorithm and multi-carrier ratio fairness algorithm complement each other to get the second best results of fairness and throughput, to solve the problem of fairness between users and to consider the Qos requirements of users. Finally, the algorithm is simulated.