OTFS Best Readings

The SIG has finalized the IEEE ComSoc Best Readings in Orthogonal Time Frequency Space (OTFS) and Delay Doppler Signal Processing. 

This collection of Best Readings aims to provide an outlook of OTFS techniques, including fundamentals, recent advances, and relevant applications. The overview section of this reading list provides a holistic picture of the-state-of-the-art. The subsequent sections cover nine active topics within this field, including performance limits, channel characteristics, transceiver designs, MIMO and multi-user OTFS system, DD communications and sensing, and prototypes. The last section summarizes several alternatives to OTFS based on TF transformations. The guest editors hope that this list will provide valuable references for all researchers working in the area of OTFS.

https://www.comsoc.org/publications/best-readings/orthogonal-time-frequency-space-otfs-and-delay-doppler-signal-processing

Contributors: Saif Khan Mohammed

Topic 1: Introductory/Overview/White Papers on OTFS 

1. A. Monk, R. Hadani, M. Tsatsanis and S. Rakib, ``OTFS - Orthogonal Time Frequency Space: A Novel Modulation Meeting 5G High Mobility and Massive MIMO Challenges,'' arXiv:1608.02993 [cs.IT] 9 Aug. 2016.

2. R. Hadani et al., "Orthogonal Time Frequency Space Modulation," 2017 IEEE Wireless Communications and Networking Conference (WCNC), 2017, pp. 1-6, doi: 10.1109/WCNC.2017.7925924.

3. R. Hadani et al., "Orthogonal Time Frequency Space (OTFS) modulation for millimeter-wave communications systems," 2017 IEEE MTT-S International Microwave Symposium (IMS), 2017, pp. 681-683, doi: 10.1109/MWSYM.2017.8058662.

4. R. Hadani and A. Monk, ``OTFS: A New Generation of Modulation Addressing the Challenges of 5G,'' arXiv:1802.02623[cs.IT], www.arxiv.org, Feb. 2018.

5. Z. Wei, W. Yuan, S. Li, J. Yuan, G. Bharatula, R. Hadani and L. Hanzo, "Orthogonal Time-Frequency Space Modulation: A Promising Next-Generation Waveform," in IEEE Wireless Communications, vol. 28, no. 4, pp. 136-144, August 2021, doi: 10.1109/MWC.001.2000408.

Topic 2: Theory of OTFS Modulation

1. S. K. Mohammed, "Derivation of OTFS Modulation From First Principles," in IEEE Transactions on Vehicular Technology, vol. 70, no. 8, pp. 7619-7636, Aug. 2021, doi: 10.1109/TVT.2021.3069913.

Topic 3: Detection Algorithms for OTFS Signals 

1. K. R. Murali and A. Chockalingam, "On OTFS Modulation for High-Doppler Fading Channels," 2018 Information Theory and Applications Workshop (ITA), 2018, pp. 1-10, doi: 10.1109/ITA.2018.8503182.

2. P. Raviteja, K. T. Phan, Q. Jin, Y. Hong and E. Viterbo, "Low-complexity Iterative Detection for Orthogonal Time Frequency Space Modulation," 2018 IEEE Wireless Communications and Networking Conference (WCNC), 2018, pp. 1-6, doi: 10.1109/WCNC.2018.8377159.

3. M. K. Ramachandran and A. Chockalingam, "MIMO-OTFS in High-Doppler Fading Channels: Signal Detection and Channel Estimation," 2018 IEEE Global Communications Conference (GLOBECOM), 2018, pp. 206-212, doi: 10.1109/GLOCOM.2018.8647394.

4. P. Raviteja, K. T. Phan, Y. Hong and E. Viterbo, ``Interference Cancellation and Iterative Detection for Orthogonal Time Frequency Space Modulation,'' IEEE Transactions on Wireless Communications, vol. 17, no. 10, pp. 6501-6515, Oct. 2018.

5. S. Li, W. Yuan, Z. Wei, J. Yuan, B. Bai, D. W. K. Ng, and Y. Xie,  "Hybrid MAP and PIC Detection for OTFS Modulation," in IEEE Transactions on Vehicular Technology, vol. 70, no. 7, pp. 7193-7198, July 2021, doi: 10.1109/TVT.2021.308318.

6.  L. Li, Y. Liang, P. Fan and Y. Guan, "Low Complexity Detection Algorithms for OTFS under Rapidly Time-Varying Channel," 2019 IEEE 89th Vehicular Technology Conference (VTC2019-Spring), 2019, pp. 1-5, doi: 10.1109/VTCSpring.2019.8746420.

7. S.Tiwari, S. S. Das and V. Rangamgari, “Low Complexity MMSE Receiver for OTFS,” IEEE Comm. Letters, vol. 23, no. 12, Dec. 2019.

8. W. Yuan, Z. Wei, J. Yuan and D. W. K. Ng, "A Simple Variational Bayes Detector for Orthogonal Time Frequency Space (OTFS) Modulation," in IEEE Transactions on Vehicular Technology, vol. 69, no. 7, pp. 7976-7980, July 2020, doi: 10.1109/TVT.2020.2991443.

9. T. Thaj and E. Viterbo, "Low Complexity Iterative Rake Decision Feedback Equalizer for Zero-Padded OTFS Systems," in IEEE Transactions on Vehicular Technology, vol. 69, no. 12, pp. 15606-15622, Dec. 2020, doi: 10.1109/TVT.2020.3044276.

10. Singh, H. B. Mishra and R. Budhiraja, "Low-Complexity Linear MIMO-OTFS Receivers," 2021 IEEE International Conference on Communications Workshops (ICC Workshops), 2021, pp. 1-6, doi: 10.1109/ICCWorkshops50388.2021.9473839.

11. S. Li, W. Yuan, Z. Wei and J. Yuan, "Cross Domain Iterative Detection for Orthogonal Time Frequency Space Modulation," in IEEE Transactions on Wireless Communications, doi: 10.1109/TWC.2021.3110125.

Topic 4:  OTFS Channel Estimation 

1. M. Zhang, F. Wang, X. Yuan and L. Chen, "2D Structured Turbo Compressed Sensing for Channel Estimation in OTFS Systems," 2018 IEEE International Conference on Communication Systems (ICCS), 2018, pp. 45-49, doi: 10.1109/ICCS.2018.8689234.

2. P. Raviteja, K. T. Phan and Y. Hong, "Embedded Pilot-Aided Channel Estimation for OTFS in Delay–Doppler Channels," in IEEE Transactions on Vehicular Technology, vol. 68, no. 5, pp. 4906-4917, May 2019, doi: 10.1109/TVT.2019.2906357.

3. W. Shen, L. Dai, J. An, P. Fan and R. W. Heath, "Channel Estimation for Orthogonal Time Frequency Space (OTFS) Massive MIMO," in IEEE Transactions on Signal Processing, vol. 67, no. 16, pp. 4204-4217, 15 Aug.15, 2019, doi: 10.1109/TSP.2019.2919411.   

4. O. K. Rasheed, G. D. Surabhi and A. Chockalingam, "Sparse Delay-Doppler Channel Estimation in Rapidly Time-Varying Channels for Multiuser OTFS on the Uplink," 2020 IEEE 91st Vehicular Technology Conference (VTC2020-Spring), 2020, pp. 1-5, doi: 10.1109/VTC2020-Spring48590.2020.9128497.

5. D. Shi et al., "Deterministic Pilot Design and Channel Estimation for Downlink Massive MIMO-OTFS Systems in Presence of the Fractional Doppler," in IEEE Transactions on Wireless Communications, doi: 10.1109/TWC.2021.3081164.  

6. Y. Liu, S. Zhang, F. Gao, J. Ma and X. Wang, "Uplink-Aided High Mobility Downlink Channel Estimation Over Massive MIMO-OTFS System," in IEEE Journal on Selected Areas in Communications, vol. 38, no. 9, pp. 1994-2009, Sept. 2020, doi: 10.1109/JSAC.2020.3000884.

7. S. S. Das, V. Rangamgari, S. Tiwari and S. C. Mondal, "Time Domain Channel Estimation and Equalization of CP-OTFS Under Multiple Fractional Dopplers and Residual Synchronization Errors," in IEEE Access, vol. 9, pp. 10561-10576, 2021, doi: 10.1109/ACCESS.2020.3046487. 

8. Z. Wei, W. Yuan, S. Li, J. Yuan, and D. W. K. Ng, “Off-grid Channel Estimation with Sparse Bayesian Learning for OTFS Systems,” IEEE Transactions on Wireless Commununications, early access, 2021. [DOI: 10.1109/TWC.2022.3158616]    

9. F. Liu, Z. Yuan, Q. Guo, Z. Wang and P. Sun, "Message Passing Based Structured Sparse Signal Recovery for Estimation of OTFS Channels with Fractional Doppler Shifts," in IEEE Transactions on Wireless Communications, doi: 10.1109/TWC.2021.3087501.

10.  H. Qu, G. Liu, L. Zhang, M. A. Imran and S. Wen, "Low-Dimensional Subspace Estimation of Continuous-Doppler-Spread Channel in OTFS Systems," in IEEE Transactions on Communications, vol. 69, no. 7, pp. 4717-4731, July 2021, doi: 10.1109/TCOMM.2021.3072744.

11. S. Srivastava, R. K. Singh, A. K. Jagannatham and L. Hanzo, "Bayesian Learning Aided Sparse Channel Estimation for Orthogonal Time Frequency Space Modulated Systems," in IEEE Transactions on Vehicular Technology, vol. 70, no. 8, pp. 8343-8348, Aug. 2021, doi: 10.1109/TVT.2021.3096432.

Topic 5:  Multiuser OTFS

1. V. Khammammetti and S. K. Mohammed, "OTFS-Based Multiple-Access in High Doppler and Delay Spread Wireless Channels," in IEEE Wireless Communications Letters, vol. 8, no. 2, pp. 528-531, April 2019, doi: 10.1109/LWC.2018.2878740.

2.  R. M. Augustine and A. Chockalingam, "Interleaved Time-Frequency Multiple Access Using OTFS Modulation," 2019 IEEE 90th Vehicular Technology Conference (VTC2019-Fall), 2019, pp. 1-5, doi: 10.1109/VTCFall.2019.8891404.

3.  Z. Ding, R. Schober, P. Fan and H. Vincent Poor, "OTFS-NOMA: An Efficient Approach for Exploiting Heterogenous User Mobility Profiles," in IEEE Transactions on Communications, vol. 67, no. 11, pp. 7950-7965, Nov. 2019, doi: 10.1109/TCOMM.2019.2932934.

4. T. Zemen, D. Löschenbrand, M. Hofer, C. Pacher and B. Rainer, "Orthogonally Precoded Massive MIMO for High Mobility Scenarios," in IEEE Access, vol. 7, pp. 132979-132990, 2019, doi: 10.1109/ACCESS.2019.2941316.

5. M. Li, S. Zhang, P. Fan and O. A. Dobre, "Multiple Access for Massive MIMO-OTFS Networks over Angle-Delay-Doppler Domain," GLOBECOM 2020 - 2020 IEEE Global Communications Conference, 2020, pp. 1-6, doi: 10.1109/GLOBECOM42002.2020.9322081.

6. A. K. Sinha, S. K. Mohammed, P. Raviteja, Y. Hong and E. Viterbo, "OTFS Based Random Access Preamble Transmission for High Mobility Scenarios," in IEEE Transactions on Vehicular Technology, vol. 69, no. 12, pp. 15078-15094, Dec. 2020, doi: 10.1109/TVT.2020.3034130.

7. B. C. Pandey, S. K. Mohammed, P. Raviteja, Y. Hong and E. Viterbo, "Low Complexity Precoding and Detection in Multi-User Massive MIMO OTFS Downlink," in IEEE Transactions on Vehicular Technology, vol. 70, no. 5, pp. 4389-4405, May 2021, doi: 10.1109/TVT.2021.3061694.

8. K. Deka, A. Thomas and S. Sharma, "OTFS-SCMA: A Code-Domain NOMA Approach for Orthogonal Time Frequency Space Modulation," in IEEE Transactions on Communications, vol. 69, no. 8, pp. 5043-5058, Aug. 2021, doi: 10.1109/TCOMM.2021.3075237.

9. M. Li, S. Zhang, F. Gao, P. Fan and O. A. Dobre, "A New Path Division Multiple Access for the Massive MIMO-OTFS Networks," in IEEE Journal on Selected Areas in Communications, vol. 39, no. 4, pp. 903-918, April 2021, doi: 10.1109/JSAC.2020.3018826.

10.  M. S. Khan, Y. J. Kim, Q. Sultan, J. Joung and Y. S. Cho, "Downlink Synchronization for OTFS-Based Cellular Systems in High Doppler Environments," in IEEE Access, vol. 9, pp. 73575-73589, 2021, doi: 10.1109/ACCESS.2021.3079429.

Topic 6:   OTFS Transceiver/Waveform Design/Structures

1. 1. A. Farhang, A. RezazadehReyhani, L. E. Doyle and B. Farhang-Boroujeny, "Low Complexity Modem Structure for OFDM-Based Orthogonal Time Frequency Space Modulation," in IEEE Wireless Communications Letters, vol. 7, no. 3, pp. 344-347, June 2018, doi: 10.1109/LWC.2017.2776942.

2. P. Raviteja, Y. Hong, E. Viterbo and E. Biglieri, "Practical Pulse-Shaping Waveforms for Reduced-Cyclic-Prefix OTFS," in IEEE Transactions on Vehicular Technology, vol. 68, no. 1, pp. 957-961, Jan. 2019, doi: 10.1109/TVT.2018.2878891.

3. G. D. Surabhi, R. M. Augustine and A. Chockalingam, "Peak-to-Average Power Ratio of OTFS Modulation," in IEEE Communications Letters, vol. 23, no. 6, pp. 999-1002, June 2019, doi: 10.1109/LCOMM.2019.2914042.

4. S. Gao and J. Zheng, "Peak-to-Average Power Ratio Reduction in Pilot-Embedded OTFS Modulation Through Iterative Clipping and Filtering," in IEEE Communications Letters, vol. 24, no. 9, pp. 2055-2059, Sept. 2020, doi: 10.1109/LCOMM.2020.2993036.

5. M. N. Hossain, Y. Sugiura, T. Shimamura and H. Ryu, "Waveform Design of Low Complexity WR-OTFS System for the OOB Power Reduction," 2020 IEEE Wireless Communications and Networking Conference Workshops (WCNCW), 2020, pp. 1-5, doi: 10.1109/WCNCW48565.2020.9124756.

6. Z. Wei, W. Yuan, S. Li, J. Yuan, and D. W. K. Ng, “Transmitter and Receiver Window Designs for Orthogonal Time Frequency Space Modulation,” IEEE Transactions on Commununications, vol. 69, no. 4, pp. 2207-2223, Apr. 2021. 

7. S. K. Mohammed, "Time-Domain to Delay-Doppler Domain Conversion of OTFS Signals in Very High Mobility Scenarios," in IEEE Transactions on Vehicular Technology, vol. 70, no. 6, pp. 6178-6183, June 2021, doi: 10.1109/TVT.2021.3071942.

8. Y. Ge, Q. Deng, P. C. Ching and Z. Ding, "Receiver Design for OTFS with a Fractionally Spaced Sampling Approach," in IEEE Transactions on Wireless Communications, vol. 20, no. 7, pp. 4072-4086, July 2021, doi: 10.1109/TWC.2021.3055585.

9. R. Bomfin, M. Chafii, A. Nimr and G. Fettweis, "A Robust Baseband Transceiver Design for Doubly-Dispersive Channels," in IEEE Transactions on Wireless Communications, vol. 20, no. 8, pp. 4781-4796, Aug. 2021, doi: 10.1109/TWC.2021.3062263.

10. C. An and H. Ryu, "Design and Performance Evaluation of Spectral Efficient Orthogonal Time Frequency Space System," 2019 IEEE 2nd 5G World Forum (5GWF), 2019, pp. 249-252, doi: 10.1109/5GWF.2019.8911663.

Topic 7:    Performance Analysis of OTFS Modulation

1. P. Raviteja, E. Viterbo and Y. Hong, "OTFS Performance on Static Multipath Channels," in IEEE Wireless Communications Letters, vol. 8, no. 3, pp. 745-748, June 2019, doi: 10.1109/LWC.2018.2890643.

2. E. Biglieri, P. Raviteja and Y. Hong, "Error Performance of Orthogonal Time Frequency Space (OTFS) Modulation," 2019 IEEE International Conference on Communications Workshops (ICC Workshops), 2019, pp. 1-6, doi: 10.1109/ICCW.2019.8756831.

3. G. D. Surabhi, R. M. Augustine and A. Chockalingam, "On the Diversity of Uncoded OTFS Modulation in Doubly-Dispersive Channels," in IEEE Transactions on Wireless Communications, vol. 18, no. 6, pp. 3049-3063, June 2019, doi: 10.1109/TWC.2019.2909205.

4. R. M. Augustine, G. D. Surabhi and A. Chockalingam, "Space-Time Coded OTFS Modulation in High-Doppler Channels," 2019 IEEE 89th Vehicular Technology Conference (VTC2019-Spring), 2019, pp. 1-6, doi: 10.1109/VTCSpring.2019.8746394.

5. G. D. Surabhi, M. K. Ramachandran and A. Chockalingam, "OTFS Modulation with Phase Noise in mmWave Communications," 2019 IEEE 89th Vehicular Technology Conference (VTC2019-Spring), 2019, pp. 1-5, doi: 10.1109/VTCSpring.2019.8746382.

6. P. Raviteja, Y. Hong, E. Viterbo and E. Biglieri, "Effective Diversity of OTFS Modulation," in IEEE Wireless Communications Letters, vol. 9, no. 2, pp. 249-253, Feb. 2020, doi: 10.1109/LWC.2019.2951758.

7. S. S. Das, S. Tiwari, V. Rangamgari and S. C. Mondal, "Performance of iterative Successive interference cancellation receiver for LDPC coded OTFS," 2020 IEEE International Conference on Advanced Networks and Telecommunications Systems (ANTS), 2020, pp. 1-6, doi: 10.1109/ANTS50601.2020.9342760.

8. T. Blazek and D. Radovic, "Performance Evaluation of OTFS Over Measured V2V Channels at 60 GHz," 2020 IEEE MTT-S International Conference on Microwaves for Intelligent Mobility (ICMIM), 2020, pp. 1-4, doi: 10.1109/ICMIM48759.2020.9298994.

9. V. S. Bhat and A. Chockalingam, "Performance Analysis of OTFS Modulation with Transmit Antenna Selection," 2021 IEEE 93rd Vehicular Technology Conference (VTC2021-Spring), 2021, pp. 1-6, doi: 10.1109/VTC2021-Spring51267.2021.9448900.

10.  S. Li, J. Yuan, W. Yuan, Z. Wei, B. Bai and D. W. K. Ng, "Performance Analysis of Coded OTFS Systems Over High-Mobility Channels," in IEEE Transactions on Wireless Communications, vol. 20, no. 9, pp. 6033-6048, Sept. 2021, doi: 10.1109/TWC.2021.3071493.

11. J. Feng, H. Q. Ngo, M. F. Flanagan and M. Matthaiou, "Performance Analysis of OTFS-based Uplink Massive MIMO with ZF Receivers," 2021 IEEE International Conference on Communications Workshops (ICC Workshops), 2021, pp. 1-7, doi: 10.1109/ICCWorkshops50388.2021.9473699.

12.  A. Gunturu, A. R. Godala, A. K. Sahoo and A. K. R. Chavva, "Performance Analysis of OTFS Waveform for 5G NR mmWave Communication System," 2021 IEEE Wireless Communications and Networking Conference (WCNC), 2021, pp. 1-6, doi: 10.1109/WCNC49053.2021.9417346.

Topic 8:     Applications of OTFS Modulation

1. P. Raviteja, K. T. Phan, Y. Hong and E. Viterbo, "Orthogonal Time Frequency Space (OTFS) Modulation Based Radar System," 2019 IEEE Radar Conference (RadarConf), 2019, pp. 1-6, doi: 10.1109/RADAR.2019.8835764.

2. L. Gaudio, M. Kobayashi, G. Caire and G. Colavolpe, "On the Effectiveness of OTFS for Joint Radar Parameter Estimation and Communication," in IEEE Transactions on Wireless Communications, vol. 19, no. 9, pp. 5951-5965, Sept. 2020, doi: 10.1109/TWC.2020.2998583.

3. A. Pfadler, P. Jung and S. Stanczak, "Pulse-Shaped OTFS for V2X Short-Frame Communication with Tuned One-Tap Equalization," WSA 2020; 24th International ITG Workshop on Smart Antennas, 2020, pp. 1-6.

4. J. Cheng, C. Jia, H. Gao, W. Xu and Z. Bie, "OTFS Based Receiver Scheme with Multi-Antennas in High-Mobility V2X Systems," 2020 IEEE International Conference on Communications Workshops (ICC Workshops), 2020, pp. 1-6, doi: 10.1109/ICCWorkshops49005.2020.9145313.

5. X. Feng et al., "Underwater Acoustic Communications Based on OTFS," 2020 15th IEEE International Conference on Signal Processing (ICSP), 2020, pp. 439-444, doi: 10.1109/ICSP48669.2020.9320923.

6.  D. Radovic, C. F. Mecklenbräuker and T. Blazek, "OTFS Performance Over Different Measured Vehicular 60 GHz Millimeter-Wave Channels," 2021 International Conference on Software, Telecommunications and Computer Networks (SoftCOM), 2021, pp. 1-5, doi: 10.23919/SoftCOM52868.2021.9559057.

7.  J. Hu, J. Shi, S. Ma and Z. Li, "Secrecy Analysis for Orthogonal Time Frequency Space Scheme Based Uplink LEO Satellite Communication," in IEEE Wireless Communications Letters, vol. 10, no. 8, pp. 1623-1627, Aug. 2021, doi: 10.1109/LWC.2021.3072902.