On the Performance Analysis of Hybrid-Duplex Systems for Aeronautical Communications

Abstract

Air traffic growth is expected to rise sharply in the near future, causing a swell in data communication demands on the congested aeronautical spectrum which cannot be met with existing aeronautical communication systems. To this end, a hybrid-duplex (HBD) aeronautical communications system consisting of a full-duplex (FD) enabled ground station, and legacy half-duplex (HD) air-stations is proposed as a direct solution to boost spectral efficiency. In particular, the system level outage probabilities and transmission power requirements of the proposed HBD and HD aeronautical communication systems are analyzed. Performance analysis shows that the proposed HBD system can attain better outage performance in the en route scenario. The proposed HBD system is also able to support an equivalent data rate as an HD system with lower transmit power and signal-to-interference-plus-noise-ratio (SINR) requirements and longer transmission range when inter-aircraft interference and residual self-interference is kept sufficiently low.

A Power Series Approach for Hybrid-Duplex UAV Communication Systems Under Rician Shadowed Fading

“…where a n, , K , γ is given in (12). Proof: From (12), algebraic manipulation yields the power series expression of f |h | 2 (•) and F |h | 2 (•) in (13) and (14), respectively.…”

“…10 is also plotted using (33). As reference, Pr O HD 2 in the absence of shadowing is provided using (14) by substituting = X α g,2 , K = K X gs , and γ = γ HD th,2 . From Fig.…”

“…1 Although one could argue that spectrum scarcity can be addressed via an FD-UCS, i.e., UAVs and GSs operating in FD mode, such a system may encounter challenges in meeting FD transceiver design requirements due to size, weight, and power restrictions imposed upon UAVs. As such, the HBD paradigm enables existing HD-UCS to be retained while improving spectrum utilization, with applications seen in aeronautical communication systems [8], [14], UCSs [7], [15], [16], and cellular systems [17], [18].…”

“…Although UAV communications in the presence of shadowing has been studied in the literature, e.g., [2], [41], [42], these works have not considered Rician shadowed fading or Rician fading and are only valid for interference-free scenarios. For interference management strategies, the II approach has already been investigated from the outage probability perspective for aeronautical communications over Rician fading channels [8], [14], and for UAV communications over Rician fading channels [16] and Rician shadowed fading channels [15]. In particular, the work in [15] presented new power series expressions for statistics associated with the Rician shadowed fading model.…”

Enhancing spectrum efficiency through hybrid-duplex systems for aeronautical communications

“…More recently, a unified moment-based approach was proposed by Rached et al [45] that presents closed-form outage probability expressions for transmissions over various types of fading channels, including Rician fading channels that are encountered in UAV communications. Based on the work in [45], the II detector was subsequently analyzed for HBD-based aeronautical communication systems [17,99] and HBD-UCSs over Rician fading channels [18-20, 52, 100] and Rician shadowed fading channels [19,101].…”