Figure 5From: Real-time estimation of respiratory rate from a photoplethysmogram using an adaptive lattice notch filter IIR lattice notch filter structure for ALNF. Upper part means all-pole filter and lower part is all-zero filter. (a): signal flow graph representation, (b): block diagram representation. D(z) and N(z) represent denominator and numerator of transfer function of IIR lattice notch filter, respectively.Back to article page