南京邮电大学学报（自然科学版）2012，Vol.32Issue(5)：80-84,89,6.
基于OFDM的认知无线电子载波功率分配算法
Subcarrier and Power Allocation in OFDM Based Cognitive Radio Systems
摘要
Abstract
With the target of maximizing the capacity of cognitive users in OFDM-based cognitive radio network, some optimal power allocation algorithms are proposed to keep both the total transmit power and interference introduced to the primary user blow the constraints. However, these algorithms are usually complex. Therefore, two improved power allocation algorithms and their simplified versions based on the linear waterfilling( LWF) are proposed, which can rapidly confirm the subcarriers without allocating power, both of which have a less complexity than the optimal does. Presented simulation results have shown that the performance of the two improved algorithms is close to the optimal one.关键词
认知无线电/正交频分复用/线性注水/功率分配Key words
cognitive radio/ OFDM/ linear waterfilling/ power allocation分类
信息技术与安全科学引用本文复制引用
吴剑,杨龙祥,刘旭..基于OFDM的认知无线电子载波功率分配算法[J].南京邮电大学学报（自然科学版）,2012,32(5):80-84,89,6.基金项目
国家自然科学基金(61071090,61171093,61101104)、南京邮电大学引进人才科研启动基金(NY211010)资助项目 （61071090,61171093,61101104）
