TY - JOUR
T1 - Stochastic interference modeling and experimental validation for pulse-based terahertz communication
AU - Hossain, Zahed
AU - Mollica, Carley N.
AU - Federici, John F.
AU - Jornet, Josep Miquel
N1 - Funding Information:
Manuscript received September 17, 2018; revised January 27, 2019 and May 12, 2019; accepted May 22, 2019. Date of publication June 12, 2019; date of current version August 12, 2019. This work was supported in part by U.S. National Science Foundation (NSF) under Grant CNS-1730148 and Grant CNS-1846268. This paper was presented at the Proceedings of the ACM NanoCom’16 [13]. The associate editor coordinating the review of this paper and approving it for publication was K. Haneda. (Corresponding author: Zahed Hossain.) Z. Hossain was with the University at Buffalo, The State University of New York, Buffalo, NY 14260 USA. He is now with Intel Corporation (e-mail: zahedhos@buffalo.edu).
Publisher Copyright:
© 2019 IEEE.
PY - 2019/8
Y1 - 2019/8
N2 - The transmission of one-hundred-femtosecond-long pulses by following an ON-OFF keying modulation spread in time has been proposed as a way to enable Terahertz (THz)-band (0.1-10 THz) communications over short distances. Such modulation minimizes the probability of collisions due to the very small time that the channel is occupied by a user. However, given that many of the envisioned applications involve very large node densities, multi-user interference becomes unavoidable. In this paper, a stochastic model of multi-user interference is developed and experimentally validated. The model takes into account the fact that the interference power at the receiver is not a combination of the received powers from the individual nodes, but the power of the combination of the received signal amplitudes. For this, first, a mathematical framework is developed to compute the probability density function (PDF) of the interference generated by one interfering node at the receiver, starting from the PDFs of the pulse received energy and the PDF of the pulse shape. Then, the model is extended to account for multiple nodes which can constructively or destructively interfere. The developed model is experimentally validated by means of an innovative setup and the extensive numerical results are provided to analyze the trends of multi-user interference in pulse-based THz communications.
AB - The transmission of one-hundred-femtosecond-long pulses by following an ON-OFF keying modulation spread in time has been proposed as a way to enable Terahertz (THz)-band (0.1-10 THz) communications over short distances. Such modulation minimizes the probability of collisions due to the very small time that the channel is occupied by a user. However, given that many of the envisioned applications involve very large node densities, multi-user interference becomes unavoidable. In this paper, a stochastic model of multi-user interference is developed and experimentally validated. The model takes into account the fact that the interference power at the receiver is not a combination of the received powers from the individual nodes, but the power of the combination of the received signal amplitudes. For this, first, a mathematical framework is developed to compute the probability density function (PDF) of the interference generated by one interfering node at the receiver, starting from the PDFs of the pulse received energy and the PDF of the pulse shape. Then, the model is extended to account for multiple nodes which can constructively or destructively interfere. The developed model is experimentally validated by means of an innovative setup and the extensive numerical results are provided to analyze the trends of multi-user interference in pulse-based THz communications.
KW - Experimental characterization
KW - Multiple access interference
KW - Pulse modulation
KW - Stochastic processes
KW - Terahertz communications
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U2 - 10.1109/TWC.2019.2920965
DO - 10.1109/TWC.2019.2920965
M3 - Article
AN - SCOPUS:85090568485
SN - 1536-1276
VL - 18
SP - 4103
EP - 4115
JO - IEEE Transactions on Wireless Communications
JF - IEEE Transactions on Wireless Communications
IS - 8
M1 - 2920965
ER -