On the Performance of Quantum Key Distribution FSO Systems Under a Generalized Pointing Error Model
KAUST DepartmentCommunication Theory Lab
Computer, Electrical and Mathematical Sciences and Engineering (CEMSE) Division
Electrical Engineering Program
Office of the VP
Physical Science and Engineering (PSE) Division
Online Publication Date2019-07-15
Print Publication Date2019
Permanent link to this recordhttp://hdl.handle.net/10754/656039
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AbstractIn this letter, the performance of a quantum key distribution (QKD) free-space optical (FSO) system is analyzed while taking a generalized pointing error model into account. More specifically, closed-form expressions for the average received powers at both the legitimate receiver and eavesdropper are derived. In addition, their corresponding asymptotic results valid in the high telescope gain regime are also presented. To capture the secure performance, we also investigate the ratio of received powers at the eavesdropper and at the legitimate receiver. Further, in some special cases, we find the optimal telescope gains for the received powers at both the legitimate receiver and eavesdropper, as well as the power ratio, which is important and useful for a secure QKD FSO system design. Finally, some selected numerical results are presented to illustrate the mathematical formalism and validate the accuracy of the derived analytical expressions.
SponsorsThis work was funded by the office of sponsored research (OSR) at KAUST. The work of H. Zhao was done while he was studying at KAUST.
JournalIEEE Communications Letters