1. Submitted to IEEE Wireless Communications Magazine

Hyeon Seok Rou, Giuseppe Thadeu Freitas de Abreu, Emil Björnson, Sunwoo Kim, Marios Kountouris, "The Resurrection of Spectrum Spreading for 6G and Beyond: From Sinusoids to Chirps", preprint available at arXiv:2605.00249, May. 2026.

2. Submitted to IEEE Transactions on Wireless Communications

Iván Alexander Morales Sandoval, Marko Fidanovski, Hyeon Seok Rou, Giuseppe Thadeu Freitas de Abreu, Emil Björnson, "Reciprocal Beyond Diagonal Reconfigurable Intelligent Surface: Distributed Scattering Matrix Design and MIMO Beamforming via Fractional Programming and Manifold Optimization", preprint available at arXiv:2605.16006, May. 2026.

3. Submitted to IEEE Wireless Communications Letters

Hyunwoo Park, Hyeon Seok Rou, Giuseppe Thadeu Freitas de Abreu, Sunwoo Kim, "Environment-aware Near-field UE Tracking under Partial Blockage and Reflection", preprint available at arXiv:2603.12896, Feb. 2026.

4. Submitted to IEEE Open Journal of the Communications Society

Hyeon Seok Rou, Vincent Savaux, Zeping Sui, Giuseppe Thadeu Freitas de Abreu, Zilong Liu, "AFDM: Evolving OFDM for 6G+", preprint available at arXiv:2507.18793, Feb. 2026.

5. Submitted to IEEE Transactions on Wireless Communications

Marko Fidanovski, Iván Alexander Morales Sandoval, Hyeon Seok Rou, Giuseppe Thadeu Freitas de Abreu, Emil Björnson, "Reciprocal Beyond-Diagonal Reconfigurable Intelligent Surface (BD-RIS): Scattering Matrix Design via Manifold Optimization", preprint available at arXiv:2509.20246. 2025.

6. Submitted to IEEE Vehicular Technology Magazine

Niclas Führling, Hyeon Seok Rou, Giuseppe Thadeu Freitas de Abreu, Gonzalo Seco-Granados, Osvaldo Gonsa, "Rigid Body Localization and Tracking for 6G V2X: Algorithms, Applications, and Road to Adoption", preprint available at arXiv:2509.01208. 2025.

7. Submitted to IEEE Transactions on Wireless Communications

Hyeon Seok Rou, Giuseppe Thadeu Freitas de Abreu, "Chirp-Permuted AFDM: A New Degree-of-Freedom for Next-Generation ISAC Waveform Design", preprint available at arXiv:2507.20825, 2025.

1. Accepted for publication at IEEE Transactions on Wireless Communications

Kuranage Roche Rayan Ranasinghe, Zhaolin Wang, Hyeon Seok Rou Giuseppe Thadeu Freitas de Abreu, Emil Björnson, "Doubly-Dispersive Continuous MIMO Systems: Channel Modeling and Beamforming Design", preprint available at arXiv:2509.00964. 2025.

2. Accepted for publication at the IEEE Signal Processing Magazine

Andreas Bathelt, Benjamin Deutschmann, Hyeon Seok Rou,  Kuranage Roche Rayan Ranasinghe, Giuseppe Thadeu Freitas de Abreu, Peter Vouras, "The IEEE Signal Processing Society's Leading Role in Developing Standards for Computational Imaging and Sensing: Part II", preprint available at arXiv:2510.04913, Mar. 2026.

3. IEEE Transactions on Wireless Communications

Kuranage Roche Rayan Ranasinghe, Jiancheng An, Ivan Alexander Morales Sandoval, Hyeon Seok Rou, Giuseppe Thadeu Freitas de Abreu, Chau Yuen, Merouane Debbah, "Flexible Intelligent Metasurfaces in High-Mobility MIMO Integrated Sensing and Communications", IEEE Transactions on Wireless Communications (Early Access), Feb. 2026.

4. IEEE Transactions on Wireless Communications

Kuranage Roche Rayan Ranasinghe, Henrique L Senger, Gustavo P Gonçalves, Hyeon Seok Rou, Bruno S Chang, Giuseppe Thadeu Freitas de Abreu, Didier Le Ruyet, "Affine Filter Bank Modulation (AFBM): A Novel 6G ISAC Waveform with Low PAPR and OOBE", IEEE Transactions on Wireless Communications (Early Access), Feb. 2026.

5. IEEE Transactions on Wireless Communications

Kuranage Roche Rayan Ranasinghe, Kengo Ando, Hyeon Seok Rou, Giuseppe Thadeu Freitas de Abreu, Takumi Takahashi, Marco Di Renzo, "A Flexible Design Framework for Integrated Communication and Computing Receivers", IEEE Transactions on Wireless Communications (Early Access), Feb. 2026.

6. IEEE Wireless Communication Letters

Vincent Savaux, Hyeon Seok Rou, Zeping Sui, Giuseppe Thadeu Freitas de Abreu, Zilong Liu, "On the Robustness of AFDM and OTFS Against Passive Eavesdroppers", IEEE Wireless Communications Letters (Early Access), Jan. 2026.

7. IEEE Communications Standards Magazine Special Issue: "Waveforms in 6G and Beyond"

Hyeon Seok Rou, Kuranage Roche Rayan Ranasinghe, Vincent Savaux, Giuseppe Thadeu Freitas de Abreu, David Gonzalez G. Christos Masouros, "Affine Frequency Division Multiplexing (AFDM) for 6G: Properties, Features, and Challenges", in IEEE Communications Standards Magazine (Early Access), Jan. 2026.

8. IEEE Transactions on Wireless Communications

Niclas Führling, Kuranage Roche Rayan Ranasinghe, Hyeon Seok Rou, Volodymyr Vizitiv, Osvaldo Gonsa, "6D Rigid Body Localization and Velocity Estimation via Gaussian Belief Propagation," in IEEE Transactions on Signal Processing, vol. 73, pp. 3902-3917, Sep. 2025.

9. IEEE Transactions on Wireless Communications

Kuranage Roche Rayan Ranasinghe, Ivan Alexander Morales Sandoval, Hyeon Seok Rou, Giuseppe Thadeu Freitas de Abreu, George C Alexandropoulos, "Doubly-Dispersive MIMO Channels with Stacked Intelligent Metasurfaces: Modeling, Parametrization, and Receiver Design", preprint available at arXiv:2501.07724, May. 2025. 

10. IEEE Wireless Communication Letters
    Hyeon Seok Rou, Giuseppe Thadeu Freitas de Abreu, "Chirp-Permuted AFDM for Quantum-Resilient Physical-Layer Secure Communications," IEEE Wireless Communication Letters, Early Access, May. 2025.

11. IEEE Transactions on Wireless Communications
    Hyeon Seok Rou, Giuseppe Thadeu Freitas de Abreu, Takumi Takahashi, David González G., and Osvaldo Gonsa, "Enabling Massive Index Modulation Systems via Combinatorics-Free Detection," IEEE Transactions on Wireless Communications, Early Access, May. 2025.

12. IEEE Transactions on Wireless Communications
    Kuranage Roche Rayan Ranasinghe, Hyeon Seok Rou, Giuseppe Thadeu Freitas de Abreu, Takumi Takahashi, and Kenta Ito, "Joint Channel, Data and Radar Parameter Estimation for AFDM Systems in Doubly-Dispersive Channels", IEEE Transactions on Wireless Communications, vol. 24, no. 2, pp. 1602-1619, Feb. 2025.

13. IEEE Signal Processing Magazine
    Hyeon Seok Rou, Giuseppe Thadeu Freitas de Abreu, Junil Choi, David González G., Marios Kountouris, Yong Liang Guan, and Osvaldo Gonsa, "From Orthogonal Time Frequency Space (OTFS) to Affine Frequency Division Multiplexing (AFDM): A Comparative Study of Next-Generation Waveforms for ISAC in Doubly-Dispersive Channels [Special Issue on Signal Processing for the Integrated Sensing and Communications Revolution] ,"  IEEE Signal Processing Magazine, vol. 41, no. 5, pp. 71–86, Sep. 2024.

14. IEEE Transactions on Wireless Communications
    Hyeon Seok Rou, Giuseppe Thadeu Freitas de Abreu, David González G., and Osvaldo Gonsa, "Integrated Sensing and Communications for 3D Object Imaging via Bilinear Inference," IEEE Transactions on Wireless Communications, vol. 23, no. 8, pp. 8636-8653, Aug. 2024.

15. IEEE Transactions on Quantum Engineering
    Kein Yukiyoshi, Taku Mikuriya, Hyeon Seok Rou, Giuseppe Thadeu Freitas de Abreu, and Naoki Ishikawa, "Quantum Speedup of the Dispersion and Codebook Design Problems," IEEE Transactions on Quantum Engineering, vol. 5, pp. 1-16, Aug. 2024.

16. IEEE Journal of Indoor and Seamless Positioning and Navigation
    N. Führling, Hyeon Seok Rou, Giuseppe Thadeu Freitas de Abreu, David González G., and Osvaldo Gonsa, "Robust Received Signal Strength Indicator (RSSI)-Based Multitarget Localization via Gaussian Process Regression," IEEE Journal of Indoor and Seamless Positioning and Navigation, vol. 1, pp. 104-114, 2023.

17. IEEE Transactions on Wireless Communications
    Niclas Führling, Kengo Ando, Hyeon Seok Rou, and Giuseppe Thadeu Freitas de Abreu, "A Rate Splitting Multiple Access Interface for Clustered Wireless Federated Learning," IEEE Access, vol. 11, pp. 82652-82664, 2023.

18. IEEE Transactions on Wireless Communications
    Hyeon Seok Rou, Giuseppe Thadeu Freitas de Abreu, Hiroki Iimori, David González G., and Osvaldo Gonsa, "Scalable Quadrature Spatial Modulation," IEEE Transactions on Wireless Communications, vol. 21, no. 11, pp. 9293-9311, Nov. 2022.

1. Submitted to IEEE 27th International Workshop on Signal Processing and Artificial Intelligence in Wireless Communications  (SPAWC)

Shreesal Shrestha, Getuar Rexhepi, Kuranage Roche Rayan Ranasinghe, Hyeon Seok Rou, Giuseppe Thadeu Freitas de Abreu, "Regularized Approximate Message Passing for Overloaded Discrete Linear Inversion", preprint available at arXiv:2604.03717, Apr. 2026.

2. Submitted to IEEE 2026 International Symposium on Personal, Indoor and Mobile Radio Communications (PIMRC)

Hanvit Kim, Hyeon Seok Rou, Giuseppe Thadeu Freitas de Abreu, Sunwoo Kim, "Dual-Chirp AFDM for Joint Delay-Doppler Estimation with Rydberg Atomic Quantum Receivers", preprint available at arXiv:2603.12728, Mar. 2026.

1. Accepted at the IEEE 2026 International Conference on Communications (ICC) Workshops

Henrique L. Senger, Gustavo P. Goncalves, Bruno S. Chang, Hyeon Seok Rou, Kuranage Roche Rayan Ranasinghe, Giuseppe Thadeu Freitas de Abreu, Didier Le Ruyet Thadeu Freitas de Abreu, "SIR Analysis for Affine Filter Bank Modulation", preprint available at arXiv:2511.21615, Nov. 2025.

2. Accepted at the IEEE 2026 International Conference on Communications (ICC) Workshops

Ali Khandan Boroujeni, Hyeon Seok Rou, Ghazal Bagheri, Kuranage Roche Rayan Ranasinghe, Giuseppe Thadeu Freitas de Abreu, Stefan Köpsell, Rafael F Schaefer, "Secrecy-Driven Beamforming for Multi-User Integrated Sensing and Communication", preprint available at arXiv:2509.26249, Sep. 2025.

3. Accepted at the IEEE 2026 International Conference on Communications (ICC)

Hyeon Seok Rou, Giuseppe Thadeu Freitas de Abreu, "Normalized Ambiguity Function Characteristics of OFDM, OTFS, AFDM, and CP-AFDM for ISAC", preprint available at arXiv:2510.11216, Oct. 2025.

4. Accepted at the IEEE 2026 International Conference on Acoustics, Speech, and Signal Processing (ICASSP)

Hyeon Seok Rou, Kengo Ando, Giuseppe Thadeu Freitas de Abreu, David Gonzalez G., "Quadrature Over-the-Air-Computation for Multimodal Dual-Stream Signal Processing", preprint available at arXiv:2507.00508, Jul. 2025.

5. Accepted at the IEEE 2026 Wireless Communications and Networking Conference (WCNC)

Ali Khandan Boroujeni, Hyeon Seok Rou, Ghazal Bagheri, Giuseppe Thadeu Freitas de Abreu, Stefan Köpsell, Kuranage Roche Rayan Ranasinghe, Rafael F. Schaefer, "A Secure ISAC Waveform Design Framework via Random Frequency and PRI Agility", preprint available at arXiv:2509.21162, Sep. 2025.

6. IEEE 2025 4th International Conference on 6G Networking

Vincent Savaux, Steve Sawadogo, Hyeon Seok Rou, Giuseppe Thadeu Freitas de Abreu, "On the Noise Robustness of Affine Frequency Division Multiplexing: Analysis and Applications", preprint available at arXiv:2510.03901, Oct. 2025.

7. IEEE 2025 Asilomar Conference on Signals, Systems, and Computers

Getuar Rexhepi, Hyeon Seok Rou, Giuseppe Thadeu Freitas de Abreu, George C Alexandropoulos, "Blinding the Wiretapper: RIS-Enabled User Occultation in the ISAC Era", preprint available at arXiv:2504.15033, May. 2025.

8. IEEE 2025 Asilomar Conference on Signals, Systems, and Computers

Henrique L Senger, Gustavo P Goncalves, Bruno S Chang, Hyeon Seok Rou, Kuranage Roche Rayan Ranasinghe, Giuseppe Thadeu Freitas de Abreu, Didier Le Ruyet, "Affine Filter Bank Modulation: A New Waveform for High Mobility Communications", preprint available at arXiv:2505.03589, May. 2025.

9. 2025 26th IEEE International Workshop on Signal Processing Advances in Wireless Communications (SPAWC)
   Getuar Rexhepi, Hyeon Seok Rou, Giuseppe Thadeu Freitas de Abreu, "Quantum Manifold Optimization: A Design Framework for Future Communications Systems", Surrey, UK, Jul. 2025

10. 2025 IEEE Wireless Communications and Networking Conference (WCNC)
    Kuranage Roche Rayan Ranasinghe, Kengo Ando, Hyeon Seok Rou, Giuseppe Thadeu Freitas de Abreu, and Andreas Bathelt, "Blind Bistatic Radar Parameter Estimation for AFDM Systems in Doubly-Dispersive Channels", Milan, Italy, Mar. 2025

11. 2025 IEEE Wireless Communications and Networking Conference (WCNC)
    Volodymyr Vizitiv, Hyeon Seok Rou, Niclas Führling, and Giuseppe Thadeu Freitas de Abreu, "Belief Propagation-based Rotation and Translation Estimation for Rigid Body Localization", Milan, Italy, Mar. 2025.

12. 2024 IEEE 58th Asilomar Conference in Signals, Systems, and Computers
    Hyeon Seok Rou, Kein Yukiyoshi, Taku Mikuriya, Giuseppe Thadeu Freitas de Abreu, and Naoki Ishikawa, "AFDM Chirp-Permutation-Index Modulation with Quantum-Accelerated Codebook Design," Pacific Grove, CA, USA, 2024.

13. 2024 IEEE 100th Fall Vehicular Technology Conference (VTC-Fall)
    Kein Yukiyoshi, Taku Mikuriya, Hyeon Seok Rou, Giuseppe Thadeu Freitas de Abreu, and Naoki Ishikawa, "Grover Adaptive Search for Maximum Likelihood Detection of Generalized Spatial Modulation,", Washington DC., USA, 2024.

14. 2024 IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP)
    Kuranage Roche Rayan Ranasinghe, Hyeon Seok Rou, and Giuseppe Thadeu Freitas de Abreu, "Fast and Efficient Sequential Radar Parameter Estimation in MIMO-OTFS Systems," Seoul, Republic of Korea, 2024.

15. 2023 IEEE 9th International Workshop on Computational Advances in Multi-Sensor Adaptive Processing (CAMSAP)
    Hyeon Seok Rou, Giuseppe Thadeu Freitas de Abreu, David González G., and Osvaldo Gonsa, "Enabling Energy-Efficiency in Massive-MIMO: A Scalable Low-Complexity Decoder for Generalized Quadrature Spatial Modulation," Herradura, Costa Rica, 2023.

16. 2023 IEEE 9th International Workshop on Computational Advances in Multi-Sensor Adaptive Processing (CAMSAP)
    Niclas Führling, Hyeon Seok Rou, Giuseppe Thadeu Freitas de Abreu, David González G., and Osvaldo Gonsa, "Robust Training for RSSI-Based Localization," Herradura, Costa Rica, 2023.

17. 2023 IEEE 9th International Workshop on Computational Advances in Multi-Sensor Adaptive Processing (CAMSAP)
    Aya El Mai, Hyeon Seok Rou, and Giuseppe Thadeu Freitas de Abreu, "Efficient Joint Radar and Communication Exploiting Sparsity and Spatial Modulation," Herradura, Costa Rica, 2023.

18. 2022 IEEE 56th Asilomar Conference in Signals, Systems, and Computers
    Hyeon Seok Rou, Giuseppe Thadeu Freitas de Abreu, David González G., and Osvaldo Gonsa, "Asymmetric Bilinear Inference for Joint Communications and Environment Sensing," Pacific Grove, CA, USA, 2022

19. 2022 IEEE 56th Asilomar Conference in Signals, Systems, and Computers
    Hyeon Seok Rou, Giuseppe Thadeu Freitas de Abreu, and Takumi Takahashi, "An Efficient Vector-valued Belief Propagation Decoder for Quadrature Spatial Modulation," Pacific Grove, CA, USA, 2022.

20. 2022 IEEE 56th Asilomar Conference in Signals, Systems, and Computers
    Kengo Ando, Hiroki Iimori, Hyeon Seok Rou, Giuseppe Thadeu Freitas de Abreu, David González G., and Osvaldo Gonsa, "An Iterative Discrete Least Square Estimator with Dynamic Parameterization via Deep-Unfolding," Pacific Grove, CA, USA, 2022.

21. 2022 IEEE International Conference on Communications (ICC)
    Hiroki Iimori, Takumi Takahashi, Hyeon Seok Rou, Koji Ishibashi, Giuseppe Thadeu Freitas de Abreu, and  David González G., "Grant-Free Access for Extra-Large MIMO Systems Subject to Spatial Non-Stationarity," Seoul, Republic of Korea, 2022.