无线多载波信道的保密容量及最优功率分配

被引:2
作者
曾伟超
陈雁
余官定
仇佩亮
机构
[1] 浙江大学信息与电子工程学系
关键词
窃密信道; 保密容量; 功率优化分配;
D O I
暂无
中图分类号
TN92 [无线通信];
学科分类号
080402 ; 080904 ; 0810 ; 081001 ;
摘要
从信息论的角度,研究了宽带通信系统以多载波方式传输时可以实现的保密通信容量问题.将传统多载波窃密(wiretap)信道模型推广到多载波系统,推导了窃密信道可达保密容量的计算公式.在发送端总功率受限的条件下,进一步建立了最大化保密容量的优化模型,并根据发送端信道条件获知程度的不同,提出了相应的多载波最佳功率分配策略.仿真与分析结果表明,与发送端均匀分配功率相比,利用不同获知程度的信道状态信息,经过功率优化分配,可以提高保密容量.
引用
收藏
页码:1281 / 1285
页数:5
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