摘要
根据认知无线电网络特点,提出一种基于自适应OFDM技术的认知无线电频谱分配策略,该方案通过自适应OFDM机制将无线频谱资源划分为若干自适应子载波,同时在子载波上采用频谱利用率高的MQAM调制方式.仿真结果表明,采用该方案提升了认知无线电网络中系统的频谱效用,同时由于自适应性的引入,使算法获得了较快的收敛性.
According to the character of cognitive radio network, a novel dynamic spectrum allocation scheme based on adaptive OFDM technology is proposed. With the methodology of adaptive OFDM, the wireless spectrum is divided into sub-carriers, meanwhile, using the MQAM modulation in each sub-carrier. The simulation results show that this scheme improve the availability of spectrum, meanwhile getting a better convergence character.
出处
《兰州大学学报（自然科学版）》
CAS
CSCD
北大核心
2009年第F06期141-144,共4页
Journal of Lanzhou University(Natural Sciences)
基金
国家自然科学基金项目(60832009)
