Abstract
In this paper, we have evaluated and analyzed OTFS(Orthogonal Time Frequency Space) modulation and OTFS-MIMO(Multiple Input Multiple Output) system. OTFS modulation can concisely compensate delay-Doppler spreading effect by using 2D(2-Dimension) iDFT (inverse Discrete Fourier Transform) and DFT(Discrete Fourier Transform) operation. It enables OTFS system to transmit high-speed data. Especially, OTFS-MIMO system can transmit all data streams without performance degradation on high Doppler frequency channel. As simulation results, we have confirmed that 1×1 OTFS system’s achievable rate is a similar to each stream of 2×2 OTFS-MIMO system. That is, we have also confirmed that 2×2 MIMO system can completely achieve double achievable rate in comparison with OTFS system on high Doppler frequency channel.
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