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Low Complexity Modem Structure for OFDM-Based Orthogonal Time Frequency Space Modulation
Open accessAbstract
Orthogonal time frequency space (OTFS) modulation is a 2-D 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 of a given multicarrier waveform with the addition of precoding and post-processing units to the modulator and demodulator. In this letter, we present discrete-time formulation of an orthogonal frequency division multiplexing-based OTFS system. We argue against deployment of window functions at the OTFS transmitter in realistic scenarios and thus limit any sort of windowing to the receiver side. We study 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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Cited by
Practical Pulse-Shaping Waveforms for Reduced-Cyclic-Prefix OTFS
Raviteja, P., Hong, Y., Viterbo, E., & Biglieri, E. (2019) · IEEE Transactions on Vehicular Technology · doi:10.1109/tvt.2018.2878891 · Cited by 616
Channel Estimation for Orthogonal Time Frequency Space (OTFS) Massive MIMO
Shen, W., Dai, L., An, J., Fan, P., & Heath, R. W. (2019) · IEEE Transactions on Signal Processing · doi:10.1109/tsp.2019.2919411 · Cited by 459
Xu, C., Xiang, L., An, J., Dong, C., Sugiura, S., Maunder, R. G., Yang, L.-L., & Hanzo, L. (2023) · IEEE Internet of Things Journal · doi:10.1109/jiot.2022.3203895 · Cited by 90
Metadata
- Authors
- Farhang, A., RezazadehReyhani, A., Doyle, L. E., & Farhang-Boroujeny, B.
- Venue
- IEEE Wireless Communications Letters
- Published
- 2018-06
- Volume
- 7
- Issue
- 3
- Pages
- 344-347
- ISSN
- 2162-2337 (ISSN-L)
- 2162-2345
- OpenAlex
- W2763971079
- Cited by
- 264
- References
- 0
- FWCI
- 5.82
- Type
- journal article
- Language
- en
- Open access
- green
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- Farhang, A., RezazadehReyhani, A., Doyle, L. E., & Farhang-Boroujeny, B. (2018). Low Complexity Modem Structure for OFDM-Based Orthogonal Time Frequency Space Modulation. IEEE Wireless Communications Letters. https://doi.org/10.1109/lwc.2017.2776942
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