Research Article
Specific Emitter Identification Based on a Hybrid Deep Neural Network for ACARS Authentication
Figure 4
Waveform diagrams of several key steps in signal preprocessing.
| (a) Received ACARS signal r(t) |
| (b) Timing estimation τ in the output of MSK demodulation y(t) |
| (c) τ, forward-intercepted Tp and backward-intercepted Tq in r(t) |
| (d) Valid signal v(t) |