摘要
小区域重叠干扰下的通信滤波器通信信号由于受到外界环境的干扰通常极不稳定,传统噪声抑制方法只适用于平稳信号,无法实现复杂环境下通信滤波器噪声的抑制,提出一种基于自适应非线性滤波的小区重叠干扰下通信滤波器噪声抑制算法,对小区重叠干扰下的通信信号进行预增强处理,对得到的通信信号和既定阈值进行比较,判断是否需要进行噪声抑制,为小区重叠干扰下的通信滤波器噪声抑制提供有效依据。假设小区重叠干扰喜爱通信滤波器接收信号是同步的,给出采样结果。对滤波器的估计方差和条件方差进行计算,求出背景噪声和干扰剩余之和的方差,通过自适应改变非线性变换的非线性部分的变化曲线,实现小区域重叠干扰下的通信滤波器噪声抑制。仿真实验结果表明,所提方法具有很高的噪声抑制性能。
The filter under the small area overlap interference of communication signals due to the interference of the external environment is usually unstable, noise suppression method is only applicable to traditional stationary signal, can not be achieved under complicated environment communication filter noise suppression, puts forward a kind of nonlinear filtering based on adaptive filter noise suppression method under the area overlap interference of communication, the area under the overlap interference of communication signal enhancement processing, to get the communication signal and the given threshold comparison, determine whether the need for noise suppression, for village under the overlap interference of communications filter noise suppression to provide effective basis.Suppose love communication area overlap interference filter signals are synchronous, the sampling results are given.Estimate of the filter variance and conditional variance is calculated, and the variance of the sum of the remaining background noise and interference, through nonlinear adaptive change nonlinear transform part of the curve, realize communication under small area overlap interference filter noise suppression.The simulation results show that the proposed method has the very high noise suppression performance.
出处
《科技通报》
北大核心
2016年第3期136-139,共4页
Bulletin of Science and Technology
关键词
小区重叠干扰
通信滤波
噪声抑制
community overlap interference
communication filtering
noise suppression
