摘要
基于有效抑制各种大功率窄带和宽带干扰这一目的,提出了一种利用自适应谱线增强器分离并抑制的方法。该方法通过多个IIR格型陷波器级联将干扰信号和有用信号完全分离,再通过减法器恢复出待处理的期望信号。讨论了基于相位一致性逼近准则对多个IIR格型陷波器级联系数的全局化设计,并通过一个跳频信号检测实例,分析了干扰信号的分离和消除程度。仿真结果表明,除同频干扰外该方法能将大功率窄带和宽带干扰几乎完全分离和抑制,为恶意干扰环境下的通信接收机增强免疫力提供了一种有效的解决方法。
For an effective suppression of large power interference including wide-band （WBI） and narrow-band （NBI） ones, a separation and suppression method based on an adaptive line enhancer （ALE） is proposed. The jamming signals can be separated from the useful signals through infinite impulse response （ⅡR） multiple lattice notch filter designed as all-pass filter and the expected signals can be restored through the subtracter. The globalization algorithm of 2L all-pass ⅡR lattice notch filter＇s coefficients is designed based on phase consistency criterion. A practical instance for frequency hopping （FH） signal detection is applied in this method. The simulation results show that strong power jamming co-frequency interference can be separated and eliminated effectively, consequently, an effective solution for communication receiver is provided to enhance the protection against jamming.
出处
《科技导报》
CAS
CSCD
北大核心
2009年第12期42-46,共5页
Science & Technology Review
基金
湖南省自然科学基金项目(07JJ6105)
湖南人文科技学院青年课题(2008QN006)
关键词
窄带干扰
宽带干扰
IIR格型陷波器
自适应谱线增强器
跳频信号
narrowband interference （NBI）
wideband interference （WBI）
ⅡR lattice notch filter
adaptive line enhancer （ALE）
frequency hopping（FH） signals
