Time and phase RF synchronization using free space optical technology

Ronald H. Smith; William R. A. Ziegler; Stephen Roberson

doi:10.1117/12.3013572

5 June 2024 Time and phase RF synchronization using free space optical technology

Ronald H. Smith, William R. A. Ziegler, Stephen Roberson

Proceedings Volume 13049, Laser Radar Technology and Applications XXIX; 1304907 (2024) https://doi.org/10.1117/12.3013572
Event: SPIE Defense + Commercial Sensing, 2024, National Harbor, Maryland, United States

Abstract

Small unmanned aerial systems (UASs) have found many applications within both the defense and commercial sectors. [1] With the increasing use of small UASs, it is desired to equip them with RF sensors/payloads to permit them to work together to form a coherent beam on a target. [2] To do this, precise time synchronization among the UASs is essential. Current techniques rely on either the use of GPS or an embedded signal from the target to time synchronize multiple UASs.

The goal is to obtain accuracy in timing (10 to 100 picoseconds) and phase coherence of about 1/10 of a relevant RF operating wavelength (UHF or higher band) between nodes.

4S Silversword Software and Services (4S) is using their Free Space Optical (FSO) system identified as Through-the- Air Link Optical Component (TALOC) in conjunction with 915 MHz RF emissions to obtain sub-nanosecond time of flight measurements, corresponding to fractional wavelength position precision, using free space optical measurements.

In this paper, we show the calculations, technology background, and the results of system tests.

Conference Presentation

Citation Download Citation

Ronald H. Smith, William R. A. Ziegler, and Stephen Roberson "Time and phase RF synchronization using free space optical technology", Proc. SPIE 13049, Laser Radar Technology and Applications XXIX, 1304907 (5 June 2024); https://doi.org/10.1117/12.3013572

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available