基于分数傅里叶变换的认知无线电抗干扰系统

被引:2
作者
刘鑫
谭学治
机构
[1] 哈尔滨工业大学通信技术研究所
关键词
认知无线电; 分数傅里叶变换; 干扰抑制; 频谱空穴; 误码率;
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
认知无线电之间的冲突或者授权用户的干扰会降低认知无线电系统的性能,为此,文中提出了采用分数傅里叶变换的认知无线电抗干扰系统,将在分数傅里叶变换域具有能量集中性的Chirp信号作为认知无线电的基带信号,接收端通过分数傅里叶变换域滤波和相关运算恢复出原始数据.仿真表明:文中的系统能够提取出有用信号的能量,当干扰为余弦信号时,要比未采用分数傅里叶变换的系统具有更低的误码率,而且还能够有效地抑制多径干扰和其他的多认知用户的干扰.
引用
收藏
页码:44 / 48
页数:5
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