A WFRFT-TDCS Combinatory Design to Guarantee Communication Security

In this paper, we propose a weighted-type fractional Fourier transform based transform domain communication system (WFRFT-TDCS) combinatory system to guarantee the communication security. The original data is divided into two parts. One part is modulated by PSK and utilized to transmit the majority of the data in traditional TDCS, while the other part is imbedded in traditional TDCS to control the basic function of TDCS and then will be further processed by WFRFT to encrypt the communication system. Theoretical analyses show that the designed system can achieve a higher spectrum efficiency and will not bring too much computational burden. Moreover, Monte Carlo simulations are conducted and demonstrate the proposed system can achieve an excellent anti-eavesdropping capability, while remaining its own communication qualities in the additive white Gaussian noise (AWGN) channel.