Open AccessA joint weighted power detector for Willie in two‐hop covert communication system
Author(s) -
Wan Zehan,
Huang Ying,
Lei Jing,
Lai Ke,
Huang Luying
Publication year - 2022
Publication title -
electronics letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.375
H-Index - 146
eISSN - 1350-911X
pISSN - 0013-5194
DOI - 10.1049/ell2.12584
Subject(s) - detector , covert , phase detector , joint (building) , computer science , maximum a posteriori estimation , hop (telecommunications) , power (physics) , scheme (mathematics) , a priori and a posteriori , algorithm , mathematics , telecommunications , statistics , maximum likelihood , engineering , physics , electrical engineering , architectural engineering , philosophy , linguistics , quantum mechanics , mathematical analysis , epistemology , voltage
This letter proposes a joint weighted power detector based on maximum a posteriori probability criterion for Willie aiming at two‐hop covert communication scenario, which is a near optimal detector. Instead of only supervising one single phase, Willie combines the observations of two phases to make joint decision in the proposed scheme. The proposed scheme achieves lower probability of detection error than adding‐power‐directly‐detector scheme and the existing single‐phase‐detector scheme due to sufficient utilization of the two‐phase observations. Numerical results demonstrate the benefit of authors' proposed scheme.