Waveform and spectrum management for unmanned aerial systems beyond 2025

The application domains of civilian unmanned aerial systems (UASs) include agriculture, exploration, transportation, and entertainment. The expected growth of the UAS industry brings along new challenges: Unmanned aerial vehicle (UAV) flight control signaling requires low throughput, but extremely high reliability, whereas the data rate for payload data can be significant. This paper develops UAV number projections and concludes that small and micro UAVs will dominate the US airspace with accelerated growth between 2028 and 2032. We analyze the orthogonal frequency division multiplexing (OFDM) waveform because it can provide the much needed flexibility, spectral efficiency, and, potentially, reliability and derive suitable OFDM waveform parameters as a function of UAV flight characteristics. OFDM also lends itself to agile spectrum access. Based on our UAV growth predictions, we conclude that dynamic spectrum access is needed and discuss the applicability of spectrum sharing techniques for future UAS communications.

[1]  A. Gelonch,et al.  Cognitive Resource Management: For All Wireless Access Layers , 2012, IEEE Vehicular Technology Magazine.

[2]  Steve Henriksen.  Unmanned Aircraft System Control and Atc Communications Bandwidth Requirements , 2013 .

[3]  Jeffrey H. Reed,et al.  Wideband air-to-ground radio channel measurements using an antenna array at 2 GHz for low-altitude operations , 2003, IEEE Military Communications Conference, 2003. MILCOM 2003..

[4]  Andrea J. Goldsmith,et al.  Degrees of freedom in adaptive modulation: a unified view , 2001, IEEE Trans. Commun..

[5]  Mark McHenry,et al.  Dynamic Spectrum Access radio performance for UAS ISR missions , 2010, 2010 - MILCOM 2010 MILITARY COMMUNICATIONS CONFERENCE.

[6]  Timothy X. Brown,et al.  Secure Distribution of Spectrum Policies to Cognitive Radios in Unmanned Aircraft Systems , 2010 .

[7]  Reg Austin,et al.  Unmanned Aircraft Systems: Uavs Design, Development and Deployment , 2010 .

[8]  Raj Jain,et al.  Requirements, Challenges and Analysis of Alternatives for Wireless Datalinks for Unmanned Aircraft Systems , 2012, IEEE Journal on Selected Areas in Communications.

[9]  Timothy X. Brown,et al.  Policy-based radios for UAS operations , 2012, 2012 IEEE Globecom Workshops.

[10]  Ramjee Prasad,et al.  Performance Analysis of OFDM Systems with Adaptive Sub Carrier Bandwidth , 2008, IEEE Transactions on Wireless Communications.

[11]  Jaber Ahmad Kakar,et al.  UAV Communications: Spectral Requirements, MAV and SUAV Channel Modeling, OFDM Waveform Parameters, Performance and Spectrum Management , 2015 .