摘要
针对平稳噪声下的信号恢复问题,提出一种信噪比最大化指标函数,利用混合信号中噪声的协方差矩阵先验知识,通过多通道信号的线性组合,恢复出需要检测的信号,并使其信噪比最大化。对方法进行了推导和仿真,结果表明,这种基于信噪比最大化的信号恢复方法能够在信号和噪声频谱有较大重叠的情况下,增强信号同时抵消噪声,以最大信噪比恢复出需要的信号,效果明显,具有良好的实际应用价值。
A signal recovery method based on SNR maximization is proposed,this method uses a priori knowledge of the covariance matrix of noise in the mixed signal,recovers the required signal and maximizes the SNR by linear combination of multi-channel received signals.The method is derived and simulated,the result shows that the signal recovery method based on SNR maximization can enhance signal and cancel noise in the circumstance that signal and noise have overlapped spectrum,and the recovered signal has maximal SNR,the method has an obviously good performance and good application value.
出处
《测控技术》
CSCD
北大核心
2012年第5期68-72,共5页
Measurement & Control Technology
关键词
信号恢复
噪声抵消
信噪比
signal recovery
noise cancelation
signal-to-noise ratio
