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An Improved Transform Domain Adaptive Narrowband Interference Suppression Technique

机译:一种改进的变换域自适应窄带干扰抑制技术

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摘要

To suppress the strong narrowband interference (NBI) in the direct sequence spread spectrum (DSSS), a simplified method of the NBI suppression based on wavelet package transform (WPT) is presented in this paper. Based on the power spectrum density (PSD) of the spread spectrum signal and the criterion of energy compaction measure (ECM), this method can track the change of the input signal spectrum and locate the interference in the spread spectrum signal efficiently and quickly, and then change the tap weight adaptively to suppress the strong or weak NBI separately. The simulation results show that the adaptive interference suppression method can eliminate the fast time change strong NBI and decrease the useful information loss during the processing. So the anti-interference performance of the system will be improved.
机译:为了抑制直接序列扩频(DSSS)中的强窄带干扰(NBI),本文提出了一种基于小波包变换(WPT)的NBI抑制的简化方法。该方法基于扩频信号的功率谱密度(PSD)和能量压缩度量(ECM)准则,可以跟踪输入信号频谱的变化并快速有效地定位扩频信号中的干扰,并且然后自适应地改变抽头重量,以分别抑制NBI的强弱。仿真结果表明,自适应干扰抑制方法可以消除快速变化的强NBI,减少处理过程中有用的信息损失。因此将提高系统的抗干扰性能。

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