Computer Sciences and Information Technology
Title : | Design of Various Algorithms for Terahertz Communication in 6G and Beyond |
Area of research : | Computer Sciences and Information Technology |
Principal Investigator : | Dr. Kuntal Deka, Indian Institute Of Technology (IIT) Guwahati, Assam |
Timeline Start Year : | 2022 |
Timeline End Year : | 2024 |
Contact info : | kuntaldeka@iitg.ac.in |
Equipments : | GPU-based workstation
Graphics card |
Details
Executive Summary : | The bottleneck of wireless communication is bandwidth scarcity which has become a significant issue for 5G telecommunication. To resolve this issue, various researchers and telecom engineers have considered using Terahertz (THz) bands in 6G standards. The THz band in the range of 300 GHz-10 THz is the last unexplored region of the allowable spectrum. Recent progress in plasmonic and photonic technologies has given genuine scope for developing THz transceivers. THz communication offers a few advantages: the abundance of available bandwidth, strong line-of-sight paths in the channel, etc. On the other hand, THz communication poses unique challenges to the designers. The loss due to molecular absorption hampers the communication. This fact necessitates a fresh look at the channel modeling process. Moreover, the Doppler effect will be severe in THz communication due to high carrier frequency. Orthogonal frequency division multiplexing (OFDM) has been successfully used in 4G and 5G. However, it fails to meet the requirement in future communication scenarios. The limitations of OFDM become visible in the case of high Doppler channel conditions. When the users utilizing the network are of increased mobility, that will affect the performance to a great extent that cannot be compensated by OFDM; this includes cases of high-speed trains, vehicle-to-mobile, and vehicle-to-infrastructure communication. To overcome these limitations and utilize 5G networks to their total efficiency, a new multi-carrier modulation technique called Orthogonal Time Frequency Space (OTFS) is introduced. OTFS operates in a domain other than the conventional time-frequency domain, called the delay-Doppler domain. The advantage of the delay-Doppler representation is that it will convert a time-variant channel to a time-invariant channel. Due to the use of localized pulses in the delay-Doppler domain, OTFS outperforms OFDM in high Doppler scenarios. The robustness of OTFS against Doppler shifts makes it a suitable candidate for THz communication. This project aims to design various algorithms required for THz communication such as channel estimation, waveform design based on OTFS, THz MIMO transmission, THz non-orthogonal multiple access, etc. |
Total Budget (INR): | 4,29,000 |
Organizations involved