Because of its high directivity, free-space optical (FSO) communication offers a number of advantages. It can, however, give rise to major system difficulties concerning alignment between two terminals. During the link-acquisition step (a.k.a. coarse pointing), a ground station can be prevented from acquiring optical links due to pointing errors and insufficient information about unmanned aerial vehicle locations. We propose, in this letter, a radio-frequency (RF) lens antenna array to increase the performance of coarse pointing in hybrid RF/FSO communications. The proposed algorithm using a novel closed-form angle estimator, compared to conventional methods, reduces the minimum outage probability by over a thousand times.
|Number of pages||5|
|Journal||IEEE Wireless Communications Letters|
|Publication status||Published - 2022 Feb 1|
Bibliographical noteFunding Information:
This work was supported by IITP Grant funded by the Korea Government (MSIT) through Free Space Optical Communication Based Vertical Mobile Network under Grant 2019-0-00685 and High Accurate Positioning Enabled MIMO Transmission and Network Technologies for Next 5G-V2X Services under Grant 2016-0-00208.
© 2012 IEEE.
All Science Journal Classification (ASJC) codes
- Control and Systems Engineering
- Electrical and Electronic Engineering