TY  - JOUR
T1  - Universal Spatio-Frequency Division Multiple Access Using LoS-MIMO in Non-Terrestrial Networks
AU  - Kim, Jonghyun 
AU  - Kim, Kwang Soon 
JO  - The Journal of Korean Institute of Communications and Information Sciences
PY  - 2022
DA  - 2022/1/15
DO  - 10.7840/kics.2022.47.10.1538
KW  - NTN
KW  - UAV
KW  - LoS-MIMO
KW  - URLLC
KW  - waveform.
AB  - In this paper, we proposed USFDMA waveform using LoS-MIMO in an UAV-based non-terrestrial network. Due to a spatio-frequency filter and a time-domain window, the USFDMA waveform has a reduced CP length even with sync errors of mobile users; therefore, the USFDMA achieves high spectral efficiency performance, compared to the conventional MIMO-OFDMA waveform.