基于相位差分的Kay法SNR阈值分析及改进

The Threshold Analysis of Kay's Method and Improvement

基于相位差分的Kay法在单个复正弦信号频率估计方面有良好的统计性能,但在实际应用中存在明显的SNR阈值。本文分析讨论了Kay法的SNR阈值及形成的原因,提出了几种有效降低SNR阈值的方法,包括:滤波器法、频率粗估计法、滤波器组法等。这些方法的优点在于降低SNR阈值的同时增加的计算量不大。计算机仿真验证了方法的有效性。

This paper discusses SNR threshold behavior, the reasons for it＇s formation, and proposes some methods of reducing the SNR threshold. The advantage of these methods is that the increase in the amount of calculation is not great with the degradation of SNR threshold. The computer simulation results are included to demonstrate the performance of these methods.