重庆邮电大学学报（自然科学版）2017，Vol.29Issue(4)：460-467,8.DOI:10.3979/j.issn.1673-825X.2017.04.006
MAP-WFRFT卫星信号星座隐蔽特性研究
A study of the covered characteristics of MAP-WFRFT satellite signals
摘要
Abstract
In order to solve the problem of insufficient concealment of satellite communication signals, a satellite covert communication system based on multi-alterable parameters weighted fractional Fourier transform (MAP-WFRFT) is proposed.The new system uses MAP-WFRFT to process satellite signals based on the traditional modulation method, rotates and diverges the distribution of the signal constellation, and simulates noises or other modulated ones.So the signals have been covered.The results of simulation show that satellite signal processed by MAP-WFRFT makes the signal constellation change and diverge obviously by changing the number of weighted terms M, the order of WFRFT α, and the scale vector V.When such parameters meet the relationship in this paper, the QPSK signal can be disguised as 16QAM signal.Simulation and analysis of bit error rate(BER) regularly changing with variational M show that the increase of the M will lead to the decrease of the BER performance.关键词
卫星隐蔽通信/加权类分数阶傅立叶变换(WFRFT)/星座图/隐蔽特性Key words
satellite communication/weighted fractional Fourier transform(WFRFT)/constellation/covered characteristics分类
信息技术与安全科学引用本文复制引用
张喆,达新宇,刘慧军..MAP-WFRFT卫星信号星座隐蔽特性研究[J].重庆邮电大学学报（自然科学版）,2017,29(4):460-467,8.基金项目
国家自然科学基金(61571460)The National Natural Science Foundation of China(61571460) （61571460）
