Frequency estimation and energy estimation method having feedback function

The invention belongs to the field of frequency estimation and energy estimation and relates to a frequency estimation and energy estimation method having a feedback function. The method is characterized by, in a feedback mode, through first Chirp_z transformation, roughly estimating f0 and obtaining new resolution and bandwidth; carrying out second transformation according to parameters obtained through the first transformation to obtain new f0 and energy; and placing the original f0 by the new f0 obtained each time, such that frequency estimation and energy estimation precision is improved, and f0 can be tracked. The method can realize high-efficiency high-precision frequency estimation and energy estimation. 本发明属于频率估计和能量估计领域，涉及种具有反馈功能的频率估计和能量估计方法。本发明方法使用反馈的模式，第次Chirp_z变换粗略估计出f0得到新的分辨率和带宽，根据第次变换得到的参数进行第二次变换得到新的f0和能量，并且每次得到f0后都替换原来的f0，这样提高了频率估计和能量估计的精度。而且可以对f0进行追踪；因此，本发明的方法可以实现高效高精度的频率和能量估计。