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Covert Transmission with Antenna Selection and Using an External Jammer | ||
| AUT Journal of Modeling and Simulation | ||
| مقاله 4، دوره 52، شماره 1، شهریور 2020، صفحه 31-38 اصل مقاله (823.4 K) | ||
| نوع مقاله: Case Study | ||
| شناسه دیجیتال (DOI): 10.22060/miscj.2019.15496.5135 | ||
| نویسندگان | ||
| Morteza Sarkheil1؛ Paeiz Azmi* 2؛ Moslem Forouzesh3؛ Ali Kuhestani4 | ||
| 1Morteza Sarkheil is with the Department of Electrical and Computer Engineering, Tarbiat Modares University, Tehran, Iran | ||
| 2Department of Electrical Engineering, Tarbiat Modares University | ||
| 3Moslem Forouzesh is with the Department of Electrical and Computer Engineering, Tarbiat Modares University, Tehran, Iran | ||
| 4Ali Kuhestani is with the Department of Electrical Engineering, Sharif University, Tehran, Iran | ||
| چکیده | ||
| This paper adopts the antenna selection technique to enhance the covert rate in a wireless communication network comprised of a source, a destination, an external jammer and an eavesdropper. In the covert communication, the level of transmit power is low and hence a source with multiple antennas can be adopted to send the information toward the single antenna destination while concurrently, the jammer transmits an artificial noise signal. For this system model, we consider a scenario where the source is forced to select one or several of its antennas to transmit its confidential information due to its limited RF chains. Furthermore, we consider two different jamming scenarios to support our covert communication: 1) The destination is unable to cancel the jamming signal; 2) The destination can subtract the jamming signal. For such a communication network, our aim is to maximize the covert rate subject to power constraint and covert communication requirement. In the first scenario, the optimization problem is non-convex, and hence, it can be solved through using Difference of Convex function (DC) method while the optimization problem of the second scenario is intrinsically convex. Our numerical results show that the higher the number of selected antennas at the transmitter, the higher the covert rate will be achieved. | ||
| کلیدواژهها | ||
| Covert communication؛ antenna selection؛ external jammer | ||
| مراجع | ||
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