On the Performance of Multihop THz Wireless System Over Mixed Channel Fading With Shadowing and Antenna Misalignment

Bhardwaj, Pranay; Zafaruddin, S. M.

doi:10.1109/tcomm.2022.3205657

Cited by 30 publications

(9 citation statements)

References 55 publications

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“…A value of k t = k r = 0 corresponds to an ideal frontend, representing no hardware imperfections. The achievable performance is limited by transceiver hardware impairment at higher frequencies [14]- [16], [35]- [41].…”

Section: System Modelmentioning

confidence: 99%

“…THz wireless backhaul/fronthaul networks have been investigated specifically in the context of single-user transmission [12]- [16], limited research have focused on the multi-user THz wireless communications [17]- [21]. The authors in [17], the authors propose hybrid beamforming applicable to situations involving single-users as well as multiple users.…”

Section: Introductionmentioning

confidence: 99%

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Performance of Dual-Hop Relaying for THz-RF Wireless Link Over Asymmetrical $\alpha$-$\mu$ Fading

Bhardwaj

Zafaruddin

2021

IEEE Trans. Veh. Technol.

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The current body of research on terahertz (THz) wireless communications predominantly focuses on its application for single-user backhaul/fronthaul connectivity at sub-THz frequencies. First, we develop a generalized statistical model for signal propagation at THz frequencies encompassing physical layer impairments, including random path-loss with Gamma distribution for the molecular absorption coefficient, short-term fading characterized by the α-η-κ-µ distribution, antenna misalignment errors, and transceiver hardware impairments. Next, we propose random access protocols for a cell-free wireless network, ensuring successful transmission for multiple users with limited delay and energy loss, exploiting the combined effect of random atmospheric absorption, non-linearity of fading, hardware impairments, and antenna misalignment errors. We consider two schemes: a fixed transmission probability (FTP) scheme where the transmission probability (TP) of each user is updated at the beginning of the data transmission and an adaptive transmission probability (ATP) scheme where the TP is updated with each successful reception of the data. We analyze the performance of both protocols using delay, energy consumption, and outage probability with scaling laws for the transmission of a data frame consisting of a single packet from users at a predefined quality of service (QoS).

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Section: System Modelmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Performance of Dual-Hop Relaying for THz-RF Wireless Link Over Asymmetrical $\alpha$-$\mu$ Fading

Bhardwaj

Zafaruddin

2021

IEEE Trans. Veh. Technol.

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“…Recently, there has been a surge in analyzing the performance of THz wireless transmission for various network configurations [4]- [8]. These research employ novel approaches to provide an exact analysis of THz systems since the statistical characterization of the channel impairments in the THz link is complicated due to the generalized α-µ distribution for the short-term fading with a zero-boresight statistical model for pointing errors.…”

Section: Introductionmentioning

confidence: 99%

“…These research employ novel approaches to provide an exact analysis of THz systems since the statistical characterization of the channel impairments in the THz link is complicated due to the generalized α-µ distribution for the short-term fading with a zero-boresight statistical model for pointing errors. However, the impact of THI was ignored as a first approximation in analyzing the performance limits of THz systems [4]- [8]. Nevertheless, the authors in [9]- [12] considered the impact of THI along with channel impairments for THz systems.…”

Section: Introductionmentioning

confidence: 99%

“…The deterministic parametric model for the path gain h l consisting of molecular absorption losses at THz bands is available in various literature [9]. The combined effect of short-term fading (distributed according to the α-µ [16]) and antenna misalignment errors (zero-boresight model [17]) is statistically modeled using the PDF as [4], [6]- [8]…”

Section: Introductionmentioning

confidence: 99%

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Performance Analysis of Cooperative Relaying for Multi-Antenna RF Transmissions over THz Wireless Link

Bhardwaj

Zafaruddin

2022

2022 IEEE 95th Vehicular Technology Conference: (VTC2022-Spring)

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Transceiver hardware impairment (THI) is inevitable for high-date rate terahertz (THz) communication. Existing statistical analysis either neglects THI's effect or provides approximate results when analyzing the performance of the THz system combined with channel fading and antenna misalignment. In this paper, we develop exact analytical expressions for the average signal-to-noise ratio (SNR), ergodic capacity, and average bit-error-rate (BER) performance of a THz wireless link under the combined effect of α-µ fading channel, zero-boresight pointing errors, and the Gaussian distributed THI. We also derive asymptotic expressions for the outage probability and average BER, which shows that the diversity order of the THz link is independent of THI's parameters. Simulations validate the derived analytical results and demonstrate the impact of the THI parameters on the THz performance.

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Performance Analysis of a Hybrid FSO/RF/THz Relay Communication System

2024

Handbook of Optical Wireless Communication

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On the Performance of Multihop THz Wireless System Over Mixed Channel Fading With Shadowing and Antenna Misalignment

Cited by 30 publications

References 55 publications

Performance of Dual-Hop Relaying for THz-RF Wireless Link Over Asymmetrical $\alpha$-$\mu$ Fading

Performance of Dual-Hop Relaying for THz-RF Wireless Link Over Asymmetrical $\alpha$-$\mu$ Fading

Performance Analysis of Cooperative Relaying for Multi-Antenna RF Transmissions over THz Wireless Link

Performance Analysis of a Hybrid FSO/RF/THz Relay Communication System

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