TABLE II.

Results of the estimation of unknown beat times. The root mean square (RMS) of the error between the beat time estimated by our method ${\widehat{u}}_k^{\text{PP}}$ and the true beat time u_k is compared with that of the other methods reported in the text.

RMS	${\widehat{u}}_k^{\text{PP}}-u_k$	${\widehat{u}}_k^{\text{N}}-u_k$	${\widehat{u}}_k^{\text{H}}-u_k$	${\widehat{u}}_k^{\text{S}}-u_k$	${\widehat{u}}_k^{{\text{S}}^{\prime }}-u_k$
pooled	14.98 ms	21.78 ms	18.79 ms	34.59 ms	19.69 ms
average	14.21 ms	19.98 ms	17.66 ms	33.08 ms	18.59 ms
median	12.10 ms	17.81 ms	17.68 ms	32.92 ms	15.71 ms