OTFS Modulation with Phase Noise in mmWave Communications

Orthogonal time frequency space modulation (OTFS) modulation is a 2-dimensional modulation technique designed in delay-Doppler domain, suited for doubly dispersive wireless channels. OTFS modulation has been shown to achieve superior error performance compared to the conventional multi-carrier systems. In this paper, we investigate the effect of phase noise on the performance of OTFS modulation in mmWave communications, where oscillator phase noise and Doppler shifts are typically high. Towards this, we first develop a vectorized formulation of the input-output relation for OTFS modulation (with OFDM as the inner core) in the delay-Doppler domain, incorporating oscillator phase noise in the effective channel. Using a message passing based signal detection algorithm, we show that OTFS is more robust to oscillator phase noise than OFDM in high Doppler mmWave channels. At an SNR for 14 dB, OTFS achieves two to three order better BER performance compared to OFDM in the presence of oscillator phase noise in a 28 GHz system.

[1]  Theodore S. Rappaport,et al.  Millimeter Wave Wireless Communications , 2014 .

[2]  A. Goldsmith,et al.  Orthogonal Time Frequency Space (OTFS) modulation for millimeter-wave communications systems , 2017, 2017 IEEE MTT-S International Microwave Symposium (IMS).

[3]  Athanasios V. Vasilakos,et al.  A Survey of Millimeter Wave (mmWave) Communications for 5G: Opportunities and Challenges , 2015, ArXiv.

[4]  Yi Hong,et al.  Interference Cancellation and Iterative Detection for Orthogonal Time Frequency Space Modulation , 2018, IEEE Transactions on Wireless Communications.

[5]  Ananthanarayanan Chockalingam,et al.  On OTFS Modulation for High-Doppler Fading Channels , 2018, 2018 Information Theory and Applications Workshop (ITA).

[6]  Peng Li,et al.  A Simple Two-stage Equalizer With Simplified Orthogonal Time Frequency Space Modulation Over Rapidly Time-varying Channels , 2017, ArXiv.

[7]  Behrouz Farhang-Boroujeny,et al.  Low Complexity Modem Structure for OFDM-Based Orthogonal Time Frequency Space Modulation , 2017, IEEE Wireless Communications Letters.

[8]  Lydi Smaini,et al.  RF Analog Impairments Modeling for Communication Systems Simulation: Application to OFDM-based Transceivers , 2012 .

[9]  Anton Monk,et al.  OTFS: A New Generation of Modulation Addressing the Challenges of 5G , 2018, ArXiv.

[10]  Ananthanarayanan Chockalingam,et al.  MIMO-OTFS in High-Doppler Fading Channels: Signal Detection and Channel Estimation , 2018, 2018 IEEE Global Communications Conference (GLOBECOM).

[11]  Ananthanarayanan Chockalingam,et al.  On the Diversity of OTFS Modulation in Doubly-Dispersive Channels , 2018, ArXiv.

[12]  A. Robert Calderbank,et al.  Orthogonal Time Frequency Space Modulation , 2017, 2017 IEEE Wireless Communications and Networking Conference (WCNC).