Fig. 3
From: Multi-tier dynamic sampling weak RF signal estimation theory
Relative error in the weak signal frequency \(\frac{\tilde{f}_{2,z,l} - f_{2,z,l}}{f_{2,z,l}}\) in tier l as a function of \(N_M\) for estimates obtained with first (downward) zero crossing (\(z_{l=1} = 1\)) and third (downward) zero crossing (\(z_{l=1} = 3\)) in tier \(l=1\); a \(N_M\) from 3.5 to 26.0; b \(N_M\) from 22.7 to 25.3. Red dots are values of relative error in weak signal frequency estimates obtained using linear interpolation to estimate first and third downward zero crossings