Abstract-Multipath propagation channel modeling and capacity analysis for terahertz indoor communications

C. Liu, C. Wang, and J. C. Cao

https://www.osapublishing.org/jot/abstract.cfm?uri=jot-84-1-53&origin=search

The eventual practical deployment of a terahertz indoor communication system for ultra-high-speed wireless links requires a unified and proper channel model. By considering the peculiarity of terahertz radiation, we develop a deterministic multipath propagation channel model based on Kirchhoff scattering theory and ray tracing techniques, which incorporates the propagation models for the line-of-sight, reflected, and scattered paths. This work also provides a novel evaluation methodology to quantify the proposed channel model for system performance investigation. Numerical simulations are carried out with experimental measurements. The results demonstrate the validity of the proposed model and reveal the importance of the non-line-of-sight propagation paths, especially the scattered rays. Spatial characteristics of the terahertz propagation have also been fully investigated for the diversity antenna steering and beamforming schemes. Finally, channel capacity and delay spread effects are evaluated and analyzed in detail, and huge potential on ultra-high-speed wireless communications over 20 Gbps has been demonstrated in the terahertz band for indoor scenarios.

© 2017 Optical Society of America

Abstract-Coverage and achievable rate analysis for indoor terahertz wireless networks

Anamaria Moldovan ;  Prasanth Karunakaran ;  Ian F. Akyildiz ;  Wolfgang H. Gerstacker

http://ieeexplore.ieee.org/document/7996402/

With the emergence of numerous novel dataintensive applications, the demand on fast wireless access is experiencing an unprecedented growth. Following this trend, the “Terabit era” is expected to become a reality in the near future. Terahertz technology is promising as an enabler due to its feature of an extremely high bandwidth. However, due to the high carrier frequency along with a high molecular absorption, the transmission distance is limited to a few meters only. In this work, the coverage problem and the achievable data rate performance of indoor THz wireless networks (THz-WNs) are investigated. In order to overcome the severe propagation loss and to improve the transmission range, a single frequency network (SFN) is advocated. The minimum individual user rate for different resource allocation schemes is analyzed, taking into account the effects of inter-symbol interference due to channel dispersion in the THz band and as a consequence of the SFN transmit protocol. Results demonstrate that the proposed SFN scheme is able to provide a high minimum achievable user data rate. The coverage probability increases from 25% when only a single access point (AP) is employed up to 95% when 20 APs are considered, for an output power of 1 W.