The Journal of China Universities of Posts and Telecommunications ›› 2021, Vol. 28 ›› Issue (3): 20-27.doi: 10.19682/j.cnki.1005-8885.2021.0008

• Wireless • Previous Articles     Next Articles

Covert communication based on transmission antenna selection in the downlink communication link


  • Received:2020-07-10 Revised:2020-11-25 Online:2021-06-30 Published:2021-06-22
  • Supported by:
    National Natural Science Foundation of China;the Key Scientific and Technological Projects in Henan Province;the Open Project of Jiangsu Engineering Laboratory;the Basic Scientific Research Operating Expenses of Henan Polytechnic University


A downlink covert communication model that consists of a base station and two legitimate users was considered. In addition to the general signals shared by the two users, the base station will send the covert signals only to one user in a certain time without wanting the other to detect this covert communication behavior. In order to achieve covert communication, two information transmission schemes are designed based on transmission antenna selection (TAS) with the help of artificial noise (AN) transmitted by the user receiving the covert signals, denoted as TAS-Ι and TAS-Πrespectively. Considering the best detection performance of the user only receiving the general signals, under the two schemes, the detection error probabilities and their average values, the connection probabilities, the system covert throughputs are separately calculated. In addition, on the premise of meeting the system’s covert conditions, an optimization scheme is proposed to maximize the covert system throughput. Finally, the simulation

results show that the proposed system can realize covert communication successfully, and the system covert performance under TAS-Ι is better than that under TAS-Π.

Key words:

covert communication, transmission antenna selection (TAS), detection error probability, covert throughput

CLC Number: