The Approach to Satellite Anti-interception Communication Based on WFRFT-TDCS

In order to improve the security and concealment of satellite communication, an anti-interception technology based on weighted fractional Fourier transform (WFRFT) and transform domain communication system (TDCS) is proposed. WFRFT replaces FFT/IFFT and CCSK frequency-domain mapping replaces time-domain modulation in TDCS. Moreover, the receiving basis function is designed according to the principle of equal gain combining. The simulation results show that, WFRFT-TDCS anti-eavesdropping technology can be applied to satellite transceiver of spectrum mismatch, as well as maintain system complexity and enhance anti-scanning performance. Even if the SNR is greatly increased, unauthorized receiver cannot demodulate the signal correctly. For authorized receiver, SNR loss is less than 1 dB when the transmission spectrum availability is more than 80%.