Sixth-generation (6G) communication systems are poised to accommodate high
data-rate wireless communication services in highly dynamic channels, with
applications including high-speed trains, unmanned aerial vehicles, and
intelligent transportation systems. Orthogonal frequency-division multiplexing
(OFDM) modulation suffers from performance degradation in such high-mobility
applications due to high Doppler spread in the channel. The recently proposed
Orthogonal Time Frequency Space (OTFS) modulation scheme outperforms OFDM in
terms of supporting a higher transmitter (Tx) and receiver (Rx) user velocity.
Additionally, the highly-dynamic time-frequency (TF) channel has little effect
on OTFS modulated signals, which enables the realization of low-complexity
pre-processing architectures for implementing massive-multiple input multiple
outputs (MIMO) based OTFS systems. However, while OTFS has received attention
in the literature from a theory and simulation perspective, there has been
comparatively little work on real-time FPGA implementation of OTFS waveforms.
Thus, in this paper, we first present a mathematical overview of OTFS
modulation and then describe an FPGA implementation of OTFS implementation on
hardware. Power, area, and timing analysis of the implemented design on a Zynq
UltraScale+ RFSoC FPGA are provided for benchmarking purposes.
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Title
FPGA Implementation of OTFS Modulation for 6G Communication Systems