Fig. 1. Flow chart of dual-target X-ray source realizing dual-symbol communication

Fig. 2. Magnetic field controlled dual target X-ray sources to realize dual symbol communication experiment

Fig. 3. X-ray tube structure model

Fig. 4. X-ray spectra corresponding to the four signals and the two characteristic spectral regions

Fig. 5. Photon counts in the X-ray characteristic spectral region corresponding to the four signals

Fig. 6. Changes in photon counts at Cr-Kα and Cu-Kα for the four signals due to signal attenuation. (a) C₁; (b) C₂; (c) C₃; (d) C₄

Fig. 7. Symbol error rate under different signal attenuations

Fig. 8. Difference between the symbol error rate without genetic optimization and with genetic optimization