Fig. 4From: Multi-tier dynamic sampling weak RF signal estimation theoryInstantaneous frequency \(f_{N=2}\) sampled at (a) 5.2 GSPS; (c) 1 GSPS, (e) 65 MSPS with zero crossing error (blue “x”) for (b) 5.2 GSPS; (d) 1 GSPS; (f) 65 mspsBack to article page