Correction of channel dispersion in terahertz wireless communications

Karl L. Strecker; Sabit Ekin; John F. O'Hara

doi:10.1117/12.2559120

8 June 2020 Correction of channel dispersion in terahertz wireless communications

Karl L. Strecker, Sabit Ekin, John F. O'Hara

Proceedings Volume 11390, Next-Generation Spectroscopic Technologies XIII; 113900N (2020) https://doi.org/10.1117/12.2559120
Event: SPIE Defense + Commercial Sensing, 2020, Online Only

Abstract

In ultra-wideband or impulse radio terahertz wireless communication, the atmosphere reshapes terahertz pulses via group velocity dispersion, a result of the frequency-dependent refractivity of air. Without correction, this can significantly degrade the achievable data transmission rate. We present realistic studies of the effects of dispersion over various wireless terahertz links, illustrating how future ultra-wideband links may be limited not by loss, but by inter-symbol interference, stemming from group velocity dispersion. These results show how typical dispersion management approaches are not valid in this case. We also present a novel method for reversing atmospheric group velocity dispersion in terahertz links in the 0.2-0.3 THz atmospheric window using a cohort of stratified media reflectors. To our knowledge, this effort is the first of its kind. Analytical and numerical simulations predict this entirely passive approach can achieve up to 99% of the theoretically possible compensation, while maintaining a power efficiency of greater than 98% across a 100 GHz bandwidth. Finally, we present a prototype reflector that was constructed and experimentally validated our simulations.

Conference Presentation

Citation Download Citation

Karl L. Strecker, Sabit Ekin, and John F. O'Hara "Correction of channel dispersion in terahertz wireless communications", Proc. SPIE 11390, Next-Generation Spectroscopic Technologies XIII, 113900N (8 June 2020); https://doi.org/10.1117/12.2559120

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