Circularly pulse-shaped orthogonal time frequency space modulation

Orthogonal time-frequency space (OTFS) modulation is a recently proposed waveform for efficient data transfer in high-speed vehicular scenario. Use of rectangular pulse shape in OTFS results in high out of band (OoB) radiation, which is undesirable for multi-user scenarios. In this work, the authors...

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Bibliographic Details
Published in:Electronics letters 2020-02, Vol.56 (3), p.157-160
Main Authors: Tiwari, S, Das, S.S
Format: Article
Language:English
Subjects:
band radiation
circular pulse shaped framework
circularly pulse‐shaped orthogonal time frequency space modulation
conventional OTFS system
efficient data transfer
error statistics
frequency division multiplexing
frequency‐localised circulant Dirichlet pulse
high‐speed vehicular scenario
low complexity transceiver structure
low complexity transmitter
multiuser scenarios
noise figure 50.0 dB
OFDM modulation
OoB radiation
orthogonal time‐frequency space modulation
orthogonal transmission
OTFS results
possible pulses
pulse shaping
pulse‐shaped OTFS
recently proposed waveform
rectangular pulse shape
transceivers
Wireless communications
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Summary:Orthogonal time-frequency space (OTFS) modulation is a recently proposed waveform for efficient data transfer in high-speed vehicular scenario. Use of rectangular pulse shape in OTFS results in high out of band (OoB) radiation, which is undesirable for multi-user scenarios. In this work, the authors present a circular pulse shaped framework for OTFS for reducing the OoB. The authors also design a low complexity transmitter for such a system. They argue in favour of orthogonal transmission for low complexity transceiver structure. The authors establish that frequency-localised circulant Dirichlet pulse is one of the possible pulses having this desirable unitary property, which can reduce OoB radiation significantly (by around 50 dB) without any loss in BER. They also show that the proposed pulse-shaped OTFS has a lower peak to average power ratio than conventional OTFS system.
ISSN:0013-5194
1350-911X
1350-911X
DOI:10.1049/el.2019.2503