The TeraNova platform: An integrated testbed for ultra-broadband wireless communications at true Terahertz frequencies

Sen, Priyangshu; Pados, Dimitris A.; Batalama, Stella N.; Einarsson, Erik; Bird, Jonathan P.; Jornet, Josep Miquel

doi:10.1016/j.comnet.2020.107370

Cited by 65 publications

(32 citation statements)

References 28 publications

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“…While none of this changes the fact that dispersion is theoretically reversible, it does raise the question: are current equalization algorithms and the digital hardware on which they are implemented capable of performing the task? Current research is presently being undertaken to investigate these issues [32], and bottlenecks related to sampling rate and signal processing limitations have been identi ied [33,34]. Presently, it seems premature to assume that the equalization and signal processing technologies we currently have will carry over to terahertz channels without signi icant modi ication and innovation.…”

Section: Resultsmentioning

confidence: 99%

M-ary quadrature amplitude modulation order optimization for terahertz wireless communications over dispersive channels

Strecker¹,

Ekin²,

O’Hara³

2021

ITU-J FET

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Highly accurate atmospheric models, based on molecular resonance information contained within the HITRAN database, were used to simulate the propagation of high capacity single-carrier quadrature amplitude modulated signals through the atmosphere for various modulation orders. For high-bandwidth signals such as those considered in this work, group velocity dispersion caused by atmospheric gases distorts the modulated waveform, which may produce bit errors. This leads to stricter Signal-To-Noise Ratio requirements for error-free operation, and this effect is more pronounced in high-order modulation schemes. At the same time, high-order modulation schemes are more spectrally efficient, which reduces the bandwidth required to maintain a given data rate, and thus reduces the total group velocity dispersion in the link, resulting in less distortion and better performance. Our work with M-ary quadrature amplitude modulated signals shows that optimal selection of modulation order can minimize these conflicting effects, resulting in decreased error rate, and reducing the performance requirements placed on any equalizers, other dispersion-compensating technologies, or signal processing hardware.

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Section: Resultsmentioning

confidence: 99%

M-ary quadrature amplitude modulation order optimization for terahertz wireless communications over dispersive channels

Strecker¹,

Ekin²,

O’Hara³

2021

ITU-J FET

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“…Pointing error parameters φ and S 0 are calculated using the values provided in [18]. We take the noise PSD for THz to be −174 dBm and the channel bandwidth equal to 10 GHz [25].…”

Section: Simulation and Numerical Resultsmentioning

confidence: 99%

Performance Analysis of Dual-Hop THz Wireless Transmission for Backhaul Applications

Pai¹,

Bhardwaj²,

Zafaruddin

2021

Preprint

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THz transmissions suffer from pointing errors due to antenna misalignment and incur higher path loss because of molecular absorption at such a high frequency. In this paper, we employ an amplify-and-forward (AF) dual-hop relay to mitigate the effect of pointing errors and extend the range of a wireless backhaul network. We provide statistical analysis on the performance of the considered system by deriving analytical expressions for the outage probability, average bit-error-rate (BER), average signal-to-noise ratio (SNR), and a lower bound on the ergodic capacity over independent and identical (i.i.d) αµ fading model and statistical pointing errors. Using computer simulations, we validate the derived analysis of the relay-assisted system. We demonstrate the effect of the system parameters on outage probability and average BER with the help of diversity order. We show that data rates up to several Gbps can be achieved using THz transmissions, which is desirable for next-generation wireless systems, especially for backhaul applications.

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“…We compute the path loss of the RF link using the 3GPP model h l,2 (dB) = −(32.4 + 17.3 log 10 (d 2 ) + 20 log 10 (10 −9 f 2 )), where d 2 (in m) is the distance and f 2 (in Hz) is the carrier frequency of the RF link. We use AWGN power of −69.4 dBm of the THz link over a bandwidth of 10 GHz and −104.4 dBm of the RF link over a bandwidth of 20 MHz [53]. Other simulation parameters for THz and RF systems as presented in Table III.…”

Section: Simulation and Numerical Resultsmentioning

confidence: 99%

“…Proof: Using F (γ) from ( 16) in (48) with special cases of α and µ enumerated in (a) and (b), and applying the standard procedure, we can get (53) and (54).…”

Section: E Average Bit Error Ratementioning

confidence: 99%

Performance Analysis of Dual-Hop Relaying for THz-RF Wireless Link with Asymmetrical Fading

Bhardwaj,

Zafaruddin

2021

Preprint

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Terahertz (THz) frequency bands can be promising for data transmissions between the core network and access points (AP) for next-generation wireless systems. In this paper, we analyze the performance of a dual-hop THz-RF wireless system where an AP facilitates data transmission between a core network and user equipment (UE). We consider a generalized model for the end-to-end channel with independent and not identically distributed (i.ni.d.) fading model for THz and RF links using the α-µ distribution, the THz link with pointing errors, and asymmetrical relay position. We derive a closed-form expression of the cumulative distribution function (CDF) of the end-to-end signal to noise ratio (SNR) for the THz-RF link, which is valid for continuous values of µ for a generalized performance analysis over THz fading channels. Using the derived CDF, we analyze the performance of THz-RF relayed system using decode-andforward (DF) protocol by deriving analytical expressions of diversity order, moments of SNR, ergodic capacity, and average BER in terms of system parameters. We also analyze the considered system with an i.i.d. model, and develop simplified performance to provide insight on the system behavior analytically under various practically relevant scenarios. Simulation and numerical analysis show significant effect of fading parameters of the THz link and a nominal effect of normalized beam-width on the performance of the relay-assisted THz-RF system.

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The TeraNova platform: An integrated testbed for ultra-broadband wireless communications at true Terahertz frequencies

Cited by 65 publications

References 28 publications

M-ary quadrature amplitude modulation order optimization for terahertz wireless communications over dispersive channels

M-ary quadrature amplitude modulation order optimization for terahertz wireless communications over dispersive channels

Performance Analysis of Dual-Hop THz Wireless Transmission for Backhaul Applications

Performance Analysis of Dual-Hop Relaying for THz-RF Wireless Link with Asymmetrical Fading

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