Fig. 14
From: Multi-tier dynamic sampling weak RF signal estimation theory
Sample rate \(f_s = 5.2\) GSPS and strong signal with \(f_1 = 3950 MHz\): a instantaneous frequency with weak signal frequency \(f_2 = 3955\) MHz; \(f_2 = 3951\) MHz; \(f_2 = 3952\) MHz, respectively, in the three tiers; b zero crossings in the instantaneous frequency as a function of time; c estimates and actual value of the weak signal amplitude \(R_2\) as a function of time; d estimates and actual value of the weak signal frequency \(f_2\); e zero crossing error; f relative error in the weak signal frequency \(f_2\); g relative error in the weak signal amplitude \(R_2\)