Fig. 21
From: Multi-tier dynamic sampling weak RF signal estimation theory
Sample rate \(f_s = 65\) msps and strong signal with \(f_1 = 5950 MHz\): a instantaneous frequency with weak signal frequency \(f_2 = 5955\) MHz; \(f_2 = 5951\) MHz; \(f_2 = 5952\) 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 \(R_2\); 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 \(R_2\)