TY - JOUR
T1 - Orthogonal Time Frequency Space (OTFS) with Dual-Mode Index Modulation
AU - Zhao, Hang
AU - He, Dongxuan
AU - Kang, Ziqi
AU - Wang, Hua
N1 - Publisher Copyright:
© 2012 IEEE.
PY - 2021/5
Y1 - 2021/5
N2 - Orthogonal time frequency space (OTFS) modulation has been proved to have better bit error rate (BER) performance over orthogonal frequency division multiplexing (OFDM) under high-mobility conditions. In this letter, a new transmission scheme, called OTFS with dual-mode index modulation (OTFS-DM-IM), is proposed to balance the transmission reliability and spectral efficiency. Moreover, a modified log-likelihood ratio (LLR) detector based on the minimum Hamming distance is designed for demodulation. Then, the theoretical BER analysis of the proposed OTFS-DM-IM is presented. Simulation results highlight the performance advantage of OTFS-DM-IM over classical OTFS and the existing OTFS systems based on index modulation (OTFS-IM), and also confirm the superiority of the modified LLR detector compared to maximum likelihood detector and conventional LLR detector.
AB - Orthogonal time frequency space (OTFS) modulation has been proved to have better bit error rate (BER) performance over orthogonal frequency division multiplexing (OFDM) under high-mobility conditions. In this letter, a new transmission scheme, called OTFS with dual-mode index modulation (OTFS-DM-IM), is proposed to balance the transmission reliability and spectral efficiency. Moreover, a modified log-likelihood ratio (LLR) detector based on the minimum Hamming distance is designed for demodulation. Then, the theoretical BER analysis of the proposed OTFS-DM-IM is presented. Simulation results highlight the performance advantage of OTFS-DM-IM over classical OTFS and the existing OTFS systems based on index modulation (OTFS-IM), and also confirm the superiority of the modified LLR detector compared to maximum likelihood detector and conventional LLR detector.
KW - OTFS
KW - OTFS-DM-IM
KW - dual-mode index modulation
KW - modified log-likelihood ratio detector
UR - http://www.scopus.com/inward/record.url?scp=85100504570&partnerID=8YFLogxK
U2 - 10.1109/LWC.2021.3053981
DO - 10.1109/LWC.2021.3053981
M3 - Article
AN - SCOPUS:85100504570
SN - 2162-2337
VL - 10
SP - 991
EP - 995
JO - IEEE Wireless Communications Letters
JF - IEEE Wireless Communications Letters
IS - 5
M1 - 9335633
ER -