Fig. 7
From: Multi-tier dynamic sampling weak RF signal estimation theory
a Estimates of zero crossings and b difference between the estimates of the zero crossings and actual zero crossings as a function of Nyquist multiple \(N_M\) for \(N=2\) simultaneous signals with strong signal frequency \(f_1 = 850\) MHz; strong signal amplitude \(R_1 = 1\); weak signal frequency \(f_2 = 855\) MHz; and weak signal amplitude \(R_2 = 0.01\)