TY - JOUR
T1 - 多维域低零功率通信
AU - An, Jianping
AU - Ding, Haichuan
AU - Wang, Shuai
N1 - Publisher Copyright:
© 2023 Science China Press. All rights reserved.
PY - 2023
Y1 - 2023
N2 - With advances in computing and signal processing technologies, wireless communication systems are facing severe security threats, necessitating effective countermeasures. Unlike traditional secure communication schemes, covert communication should hide not only information content but also data transmission activity from adversaries. To this end, we propose an energy dispersion-based covert communication scheme to ensure that communication signal detection by adversaries has close-to-zero probability. The proposed scheme spreads the energy of transmitted signals throughout the whole parameter space to limit the signal detection capability of adversaries and improve the covertness of signal transmission. By defining the covertness of transmitted signals with respect to the adversaries’ prior knowledge of parameter spaces, we study the modeling of energy dispersion-based covert communication systems and analyze their fundamental performance limitations. With these analytical results, we further investigate the impacts of adversaries’ prior knowledge on the achievable throughput of covert communications. These results demonstrate that the dispersion of signal energy can degrade the performance of coherent signal detection so that the achievable throughput of the covert communication system does not necessarily follow the power-law decrease observed in existing work on the low probability of detection communications. This work lays the theoretical foundation for covert communication based on energy dispersion.
AB - With advances in computing and signal processing technologies, wireless communication systems are facing severe security threats, necessitating effective countermeasures. Unlike traditional secure communication schemes, covert communication should hide not only information content but also data transmission activity from adversaries. To this end, we propose an energy dispersion-based covert communication scheme to ensure that communication signal detection by adversaries has close-to-zero probability. The proposed scheme spreads the energy of transmitted signals throughout the whole parameter space to limit the signal detection capability of adversaries and improve the covertness of signal transmission. By defining the covertness of transmitted signals with respect to the adversaries’ prior knowledge of parameter spaces, we study the modeling of energy dispersion-based covert communication systems and analyze their fundamental performance limitations. With these analytical results, we further investigate the impacts of adversaries’ prior knowledge on the achievable throughput of covert communications. These results demonstrate that the dispersion of signal energy can degrade the performance of coherent signal detection so that the achievable throughput of the covert communication system does not necessarily follow the power-law decrease observed in existing work on the low probability of detection communications. This work lays the theoretical foundation for covert communication based on energy dispersion.
KW - covert communications
KW - performance analysis
KW - prior knowledge
KW - spread-spectrum communications
UR - http://www.scopus.com/inward/record.url?scp=85179937030&partnerID=8YFLogxK
U2 - 10.1360/SSI-2023-0033
DO - 10.1360/SSI-2023-0033
M3 - 文章
AN - SCOPUS:85179937030
SN - 1674-7267
VL - 53
SP - 2266
EP - 2282
JO - Scientia Sinica Informationis
JF - Scientia Sinica Informationis
IS - 11
ER -