Satellite Covert Communication System with DL-MPWFRFT and Constellation Scrambling
LIU Huijun
DA Xinyu
ZHANG Zhe
Abstract：Aimed at the problem that within a certain time,the non target receiver can still get the parame-ter of the demodulation parameters effectively through parameter scanning in the 4-WFRFT covert commu-nication system,this paper proposes a satellite covert communication system by using the double layers multiple parameter weighted-type fractional Fourier transform (DL-MPWFRFT ) and constellation scramb-ling is proposed .The paper proposes DL-MPWFRFT based on multi parameter WFRFT .The hiding prin-ciple and characteristics are analyzed through the research of constellation .Though increasing the signal concealment,the constellation scrambling phase increases again after DL-MPWFRFT signal conversion . Finally,from two aspects,the comparison of error rate and the number of parameter scans,the anti inter-ception advantages of the proposed system are described qualitatively and quantitatively .By comparing the BER of the system,the result shows that even if the SNR is 15 dB,the BER of the non target receiver is still more than 0.4 .The non purpose receiver obtains the correct demodulation parameters by parameter scanning,w hich needs (M/0. 0005 )2 scans .
Keywords：satellite covert communicationweighted-type fractional Fourier transformconstellation scram bling
Publication Date：2017-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：7( 73-79 )