Figure 3
From: An improved time reversal mirror based on standard linear frequency modulation waveform

Parameter analysis of the LFM signal. (a) Pulse compression signals with different pulse widths of LFM signals (B = 4 MHz). (b) Pulse compression signals with different bandwidth of LFM signals (T = 10 μs). (c) The finite element model for transmission and reception of the LFM signals. (d) Normalized peak values of the echo signals and pulse compression signals with different pulse widths in FEM.