Covert Communication Based on Waveform Overlay with Weighted Fractional Fourier Transform Signals
Most approaches for covert communication are usually done on the domain of source coding, whereas, methods on others domain are seldom seen. There are a few researches on overlay communication which is done on waveform domain, while one of the limitations is that noises have to be added in order to cover up the constellation of hidden data transmission. In this paper, we propose a new scheme for covert communication based on waveform overlay with Weighted Fractional Fourier Transform (WFRFT) signals. Signals after single parameter WFRFT present Gaussian statistics on both time and frequency domains. Moreover, the influence of multiparameter WFRFT is similar to that of multi-path fading channels. Therefore adding noises is not necessary for this approach that capacity and security of covert communication systems based on waveform overlay techniques are increased.
covert communication waveform overlay Weighted Fractional Fourier Transform (WFRFT)
Lin Mei Xuejun Sha Naitong Zhang
Communication Research Center, Harbin Institute of Technology, Harbin, China
国际会议
北京
英文
1-4
2010-06-25（万方平台首次上网日期，不代表论文的发表时间）