Hybrid-Duplex based Control and Non-Payload Communication Systems for UAVs: An Outage Analysis

Ernest, Tan Zheng Hui; Madhukumar, A. S.; Sirigina, Rajendra Prasad; Krishna, Anoop Kumar

doi:10.1109/dasc.2018.8569353

Cited by 3 publications

(12 citation statements)

References 10 publications

(21 reference statements)

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“…Proof: The outage probability at GS can be obtained as As shadowing is considered at the GS, the impact of shadowing on the SI link due to passive SI suppression can be investigated using (16). Furthermore, for the case of Rician fading channels, we present an alternative outage probability expression from (16) in the following Corollary.…”

Section: Theoremmentioning

confidence: 99%

“…In Fig 8, the impact of shadowing and Rician K factors on Pr O HBD gs , from (16), is analyzed. Interestingly, it can be seen that Pr O HBD gs is high when the Rician K factor is high and m x 1 < 1.…”

Section: A Impact Of Shadowing At Gsmentioning

confidence: 99%

“…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].…”

Section: Introductionmentioning

confidence: 99%

“…To address the above limitation, the Rician shadowed fading model presented in [15] is a suitable choice for UAV channel modeling. Through the Rician shadowed fading model, Rician fading or Rayleigh fading UAV channels [16] can be modeled as special cases. It is worth noting that the Rician shadowed fading model is one of several shadowed fading, i.e., composite fading, models available in the literature.…”

Section: Introductionmentioning

confidence: 99%

“…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.…”

Section: Introductionmentioning

confidence: 99%

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

et al. 2019

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A hybrid-duplex (HBD) UAV communication system (UCS), i.e., HBD-UCS, to improve spectrum utilization is investigated in this work. By considering the combined effect of fading and shadowing, a comprehensive outage probability analysis of the HBD-UCS under various inter-UAV interference and shadowing scenarios over Rician shadowed fading channels is conducted. It is demonstrated that the ground station (GS) in full-duplex (FD) mode operates at lower outage probability than in half-duplex (HD) mode. Furthermore, the joint detector is shown to achieve lower outage probability than the interference ignorant (II) detector and HD-UCS, even when severe shadowing is encountered. As such, utilizing joint detectors in an HBD-UCS enables multi-UAV networks to achieve high reliability when operating in urban environments. INDEX TERMS Unmanned aerial vehicle, spectrum efficiency, half-duplex, full-duplex, hybrid-duplex, outage probability, rician, shadowing. A. MOTIVATION AND RELATED LITERATURE Although utilitarian, multi-UAV networks are mired with its own set of challenges that must be addressed. Of particular importance is the lack of available spectrum for UAV communications [5], [6]. Despite the allocation of parts of The associate editor coordinating the review of this manuscript and approving it for publication was Jiayi Zhang. the L-band and C-band for UAV control and non-payload communications (CNPC) by the International Telecommunications Union (ITU) [5], spectrum scarcity is still a challenge. In particular, many other existing systems, e.g., aeronautical communication systems, are also operating on both the L-band and C-band [5]-[7]. In this aspect, a hybrid-duplex (HBD) UAV communication system (UCS), i.e., HBD-UCS, can be a direct solution address spectrum scarcity in UAV communications. The HBD paradigm enables UAVs with existing half-duplex (HD) communication systems, i.e., HD-UCS to simultaneously operate on the same spectrum with full-duplex (FD) ground stations (GSs), effectively doubling spectrum efficiency. However, the simultaneous transmission and reception of signals results in self-interference (SI) at the FD-enabled GS, which can be mitigated via passive or active SI mitigation architectures [8], [9]. The former entails introducing path loss and shadowing, e.g., through antenna placements, while the latter involves canceling SI in the analog or digital domain [9]. Even after SI mitigation, residual SI can still remain due to non-ideal FD transceiver impairments, such as carrier phase noise and imperfect

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Section: Theoremmentioning

confidence: 99%

Section: A Impact Of Shadowing At Gsmentioning

confidence: 99%