Correction: Wu et al. Accumulatively Increasing Sensitivity of Ultrawide Instantaneous Bandwidth Digital Receiver with Fine Time and Frequency Resolution for Weak Signal Detection. Electronics 2022, 11, 1018

In the original publication [1], there were two typos found in Section 3 Equation (1) and Table 3. The time domain values N and M have been incorrectly noted and should be updated as N − 1 and M − 1. The authors state that the scientific conclusions are unaffected. This correction was approved by the Academic Editor. The original publication has also been updated.

Please find the renewed Equation (1) and Table 3 as follows:

$$X\left(v\right)=\sum _{n=0}^{N-1}x\left(n\right)W_N^{nv}$$

(1)

Table 3. The relation between the time-index 𝑢 in each time-slot and the overall sampled data.

Time-Slot	0	1	⋯	k	⋯	K − 1
u	0, 1, 2, 3, …… M − 1
$n(=u+kM)$	0, 1,… M − 1	$M,M+1,\dots 2M-1$		$kM,kM+1,\dots \left(k+1\right)M-1$		$\left(K-1\right)M, \left(K-1\right)M+1,\dots N - 1$

Table 3. The relation between the time-index 𝑢 in each time-slot and the overall sampled data.

Time-Slot	0	1	⋯	k	⋯	K − 1
u	0, 1, 2, 3, …… M − 1
$n(=u+kM)$	0, 1,… M − 1	$M,M+1,\dots 2M-1$		$kM,kM+1,\dots \left(k+1\right)M-1$		$\left(K-1\right)M, \left(K-1\right)M+1,\dots N - 1$