特定频带信噪比最大化的信号恢复方法

摘要

论文对时域的基于信噪比最大化的信号恢复方法进行了改进，提出一种使特定频带内信噪比最大化的指标函数，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，并使其在指定的频带内信噪比最大化。论文对方法进行了推导，并进行仿真，与时域的信号恢复方法进行了比较，结果表明，这种信号恢复方法能够使信号所在频带内的信噪比最大化，更有利于信号参数估计，具有良好的实际应用价值。%A signal recovery method for SNR maximization of specified frequency is proposed in this paper to improve the signal recovery method on time domain .This method uses a priori knowledge of the covariance matrix of noise in the mixed signal ,recovers the required signal and maximizes the SNR of specified frequency by linear combination of multi-chan-nel received signals .The method is derived and simulated compared with the signal recovery method on time domain in this paper .The result shows that the recovered signal has maximal SNR of specified frequency ,the method has an obviously good performance and good application value .