摘要
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。
IEEE802.22 Working Group develops an air interface based on cognitive radio for fixed point-to-multipoint WRAN working in 54~862 MHz band. Spectrum allocation is the key technology in WRAN, the most research on spectrum allocation algorithm for cognitive radio focuses on the relatively broad scope, while the allocation algorithm for specific systems such as WRAN is less studied. Based on the characteristics of OFDM and WRAN, an multi-user resource allocation algorithm in combination of MPF with KH is proposed, which could achieve fairness and sub-optimal throughput. Finally, the algorithm is simulated in WRAN system.
出处
《通信技术》
2010年第8期106-108,共3页
Communications Technology
基金
国家自然科学基金项目资助(批准号:60702020)