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Low Complexity Modem Structure for OFDM-based
Orthogonal Time Frequency Space Modulation |
Farhang, Arman; Rezazadehreyhani, Ahmad; Doyle, Linda E.; Farhang-Boroujeny, Behrouz
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Orthogonal time frequency space (OTFS) modulation is a two-dimensional signaling technique that has recently
emerged in the literature to tackle the time-varying (TV) wireless
channels. OTFS deploys the Doppler-delay plane to multiplex the
transmit data where the time variations of the TV channel are
integrated over time and hence the equivalent channel relating
the input and output of the system boils down to a time-invariant
one. This signaling technique can be implemented on the top o
f
a given multicarrier waveform with the addition of precodin
g
and post-processing units to the modulator and demodulator. In
this paper, we present discrete-time formulation of an OFDM
-
based OTFS system. We argue against deployment of window
functions at the OTFS transmitter in realistic scenarios an
d
thus limit any sort of windowing to the receiver side. We stud
y
the channel impact in discrete-time providing deeper insights
into OTFS systems. Moreover, our derivations lead to simplified
modulator and demodulator structures that are far simpler than
those in the literature.
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Keyword(s):
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Low Complexity Modem Structure; OFDM modulation; Orthogonal Time Frequency; Space Modulation |
Publication Date:
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2018 |
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Type:
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Journal article |
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Peer-Reviewed:
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Yes |
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Institution:
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Maynooth University |
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Citation(s):
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Farhang, Arman and Rezazadehreyhani, Ahmad and Doyle, Linda E. and Farhang-Boroujeny, Behrouz (2018) Low Complexity Modem Structure for OFDM-based Orthogonal Time Frequency Space Modulation. IEEE Wireless Communications Letters, 7 (3). pp. 344-347. ISSN 2162-2337 |
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Publisher(s):
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IEEE |
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File Format(s):
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other |
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Related Link(s):
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http://mural.maynoothuniversity.ie/13286/1/AF_electronic%20engineering_low%20complexity.pdf |
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First Indexed:
2020-09-25 07:00:56 Last Updated:
2020-09-26 07:03:56 |
