TY - GEN
T1 - OTFS for Underwater Acoustic Communications
T2 - 2022 OCEANS Hampton Roads, OCEANS 2022
AU - Hang, Su
AU - Li, Wei
N1 - Publisher Copyright:
© 2022 IEEE.
PY - 2022
Y1 - 2022
N2 - Recently, orthogonal time frequency space (OTFS), a two-dimensional modulation technique designed in delay-Doppler domain, has received significant attention. Generally, OTFS converts signals in the time-varying and doubly-spread channels into the slow time-varying and sparse channels in delay-Doppler domain. Compared with OFDM system, OTFS is efficient to alleviate the inter-carrier-interference (ICI) for the time-varying and doubly-spread channels. This fact motivates us the use of OTFS in the time-varying and doubly-spread underwater acoustic (UWA) channels. In this paper, we design a practical OTFS system for the UWA communication. To alleviate the Doppler effect in UWA communication, a Doppler compensation step is proposed for the UWA OTFS system. Moreover, we provide a practical channel estimation for the UWA OTFS system to avoid the problem caused by fractional Doppler shifts. We demonstrate performance of the proposed OTFS system. The simulation results show that the UWA OTFS scheme outperforms the OFDM in UWA channels.
AB - Recently, orthogonal time frequency space (OTFS), a two-dimensional modulation technique designed in delay-Doppler domain, has received significant attention. Generally, OTFS converts signals in the time-varying and doubly-spread channels into the slow time-varying and sparse channels in delay-Doppler domain. Compared with OFDM system, OTFS is efficient to alleviate the inter-carrier-interference (ICI) for the time-varying and doubly-spread channels. This fact motivates us the use of OTFS in the time-varying and doubly-spread underwater acoustic (UWA) channels. In this paper, we design a practical OTFS system for the UWA communication. To alleviate the Doppler effect in UWA communication, a Doppler compensation step is proposed for the UWA OTFS system. Moreover, we provide a practical channel estimation for the UWA OTFS system to avoid the problem caused by fractional Doppler shifts. We demonstrate performance of the proposed OTFS system. The simulation results show that the UWA OTFS scheme outperforms the OFDM in UWA channels.
KW - OTFS
KW - channel estimation
KW - delay-Doppler domain
KW - underwater acoustic channels
UR - https://www.scopus.com/pages/publications/85145783042
U2 - 10.1109/OCEANS47191.2022.9977069
DO - 10.1109/OCEANS47191.2022.9977069
M3 - 会议稿件
AN - SCOPUS:85145783042
T3 - Oceans Conference Record (IEEE)
BT - OCEANS 2022 Hampton Roads
PB - Institute of Electrical and Electronics Engineers Inc.
Y2 - 17 October 2022 through 20 October 2022
ER -