Ronny Hadani

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Ronny Hadani
  • Mathematician
  • Professor
  • Author

Ronny Hadani is an Israeli-American mathematician, specializing in representation theory and harmonic analysis, with applications to signal processing.[1][2] He is known for developing Orthogonal Time Frequency and Space (OTFS) modulating techniques, a method used for making wireless 5G communications faster,[3] that is also being considered for use in 6G technology.[4] The technology is being used by several wireless 5G related companies and Cohere Technologies, a company he has co-founded.[5][6][7][8][9]

Early life and education[edit]

Hadani received his MS degree in Computer Science from the Weizmann Institute of Science in 1999 under the supervision of David Harel. He received his Ph.D. degree in Pure Mathematics from Tel-Aviv University in 2006 under the supervision of Joseph Bernstein.[1][2]



From the years 2006 to 2009, Hadani held an L.E. Dickson Postdoctoral Fellowship of Mathematics at the University of Chicago. Since 2009, he has been an associate professor of mathematics at the University of Texas, Austin.[2][10][11]

Cohere Technologies[edit]

In 2010, Hadani co-founded Cohere Technologies with Shlomo Rakib. The company is a Silicon Valley wireless startup that focuses on wireless improvements using OTFS and the Delay-Doppler model to improve FDD/TDD spectrum performance with channel detection, estimation, prediction, and precoding software for 4G and 5G networks, compliant with 3GPP standards and O-RAN.[5][10][12]


Hadani has been granted over 70 OTFS related patents, which include a communications method employing Orthogonal Time Frequency Space (OTFS) shifting and spectral shaping, which allows users to transmit and receive at least one frame of data ([D]) over a wireless communications link. He has also patented methods of operating and implementing wireless OTFS communications systems.[7][13][14] His OTFS technology has been tested by companies such as C Spire, 5TONIC,[14][15] Telefónica,[16] and Deutsche Telekom,[17][18]

Selected publications[edit]

Papers in journals[edit]

  • Hadani, Ronny; Gurevich, Shamgar (July 2014). "The categorical weil representation". Journal of Symplectic Geometry. arXiv:1108.0351.
  • Fish, Alexander; Gurevich, Shamgar; Hadani, Ronny; Sayeed, Akbar M.; Schwartz, Oded (November 2013). "Delay-doppler channel estimation in almost linear complexity". IEEE Transactions on Information Theory. 59 (11): 7632–7644. doi:10.1109/TIT.2013.2273931. S2CID 230975.
  • Hadani, Ronny; Gurevich, Shamgar (2012). "The Weil representation in characteristic two" (PDF). Advances in Mathematics. 230 (3): 894–926. doi:10.1016/j.aim.2012.03.008. S2CID 17843124.
  • Hadani, Ronny; Gurevich, Shamgar (2008). "The geometric Weil representation". Advances in Mathematics. 13 (3). arXiv:math/0610818. Bibcode:2006math.....10818G.
  • Gurevich, Shamgar; Hadani, Ronny; Sochen, Nir (August 2008). "The Finite Harmonic Oscillator and Its Applications to Sequences, Communication, and Radar". IEEE Transactions on Information Theory. 54 (9): 4239–4253. arXiv:0808.1495. doi:10.1109/TIT.2008.926440. S2CID 6037080.

Academic works[edit]

According to Google Scholar, Hadani has published over 75 research papers and patents. His works have been cited over 3300 times. [19]


  • OTFS methods of data channel characterization and uses thereof, R Hadani, SS Rakib, US Patent 9,668,148, Cited 188 Times.[20]
  • Signal modulation method resistant to echo reflections and frequency offsets, SS Rakib, R Hadani. US Patent 9,083,595, Cited 183 Times.[21]
  • Modulation and equalization in an orthonormal time-frequency shifting communications system, R Hadani, SS Rakib, US Patent 9,590,779, Cited 182 times.[22]
  • Communications method employing orthonormal time-frequency shifting and spectral shaping, R Hadani, SS Rakib, US Patent 8,547,988, Cited 96 Times.[23]

Academic papers[edit]

  • Orthogonal time frequency space modulation, R Hadani, S Rakib, M Tsatsanis, A Monk, AJ Goldsmith, AF Molisch, 2017 IEEE Wireless Communications and Networking Conference (WCNC), 1-6, Cited 228 Times.[24]
  • Viewing angle classification of cryo-electron microscopy images using eigenvectors, A Singer, Z Zhao, Y Shkolnisky, R Hadani, SIAM Journal on Imaging Sciences 4 (2), 723-759, Cited 92 Times.[25]


  1. ^ a b "Alumni". The Weizmann Institute of Science Faculty of Mathematics and Computer Science. Retrieved July 29, 2020.
  2. ^ a b c "The 88th IEEE Vehicular Technology Conference" (PDF). IEEE. 2018. Retrieved September 24, 2020.
  3. ^ "Seminars: Fall 2017". NYU Tandon School of Engineering. 2017. Retrieved September 24, 2020.
  4. ^ Lawrence, Alex (December 9, 2020). "The OTFS Interview – Implications of a 6G Candidate Technology". 6G World. Retrieved September 24, 2020.
  5. ^ a b "Cohere Technologies". 5G World. Retrieved September 24, 2020.
  6. ^ "Seminar Series: Ronny Hadani". Qualcomm Institute. Retrieved September 24, 2020.
  7. ^ a b "Patents by Inventor Ronny Hadani". Justia Patents. Retrieved September 24, 2020.
  8. ^ Hadani, Ronny; Singer, Amit (1 September 2011). "Representation theoretic patterns in three dimensional Cryo-Electron Microscopy I: The intrinsic reconstitution algorithm". Annals of Mathematics. 174 (2): 1219–1241. doi:10.4007/annals.2011.174.2.11. PMC 3505076. PMID 23180881.
  9. ^ "Shamgar Gurevich". Google Scholar. Retrieved September 25, 2020.
  10. ^ a b "W08: Wireless Communications in High Mobility". IEEE. Retrieved September 24, 2020.
  11. ^ "Directory: Ronny Hadani". University of Texas at Austin. Retrieved September 24, 2020.
  12. ^ "Ronny Hadani Comes in Loud and Clear". The University of Texas at Austin College of Natural Sciences. Retrieved September 24, 2020.
  13. ^ "Ronny Hadani". Google Patents. Retrieved September 24, 2020.
  14. ^ a b Monica Alleven (6 December 2017). "C Spire to test Cohere OTFS technology". Fierce Wireless. Retrieved 24 September 2020.
  15. ^ "5TONIC Successfully Tests Cohere Technologies OTFS". 5TONIC. 2016. Retrieved 24 September 2020.
  16. ^ "Telefónica wraps up trial of Cohere-based FWA solution". Fierce Wireless. March 26, 2018. Retrieved 24 September 2020.
  17. ^ "Cohere's coding for 5G interests AT&T, China Mobile, Deutsche Telekom, Telefonica and Telstra". Wireless One. 30 April 2016. Retrieved September 24, 2020.
  18. ^ Iain Morris (February 26, 2020). "Deutsche Telekom, Intel breakthrough piles open RAN pressure onto big vendors". Light Reading. Retrieved 24 September 2020.
  19. ^ "Ronny Hadani Works on Google Scholar". Retrieved 2021-02-26.{{cite web}}: CS1 maint: url-status (link)
  20. ^ Hadani, Ronny (2017-05-30). "OTFS methods of data channel characterization and uses thereof".{{cite web}}: CS1 maint: url-status (link)
  21. ^ Hadani, Ronny (2015-05-28). "Signal modulation method resistant to echo reflections and frequency offsets". Retrieved 2021-02-26.{{cite web}}: CS1 maint: url-status (link)
  22. ^ Hadani, Ronny (2011-05-26). "Modulation and equalization in an orthonormal time-frequency shifting communications system".{{cite web}}: CS1 maint: url-status (link)
  23. ^ Hadani, Ronny (2010-05-28). "Communications method employing orthonormal time-frequency shifting and spectral shaping".{{cite web}}: CS1 maint: url-status (link)
  24. ^ Hadani, R.; Rakib, S.; Tsatsanis, M.; Monk, A.; Goldsmith, A. J.; Molisch, A. F.; Calderbank, R. (2017-03-19). "Orthogonal Time Frequency Space Modulation". 2017 IEEE Wireless Communications and Networking Conference (WCNC): 1–6. arXiv:1808.00519. doi:10.1109/WCNC.2017.7925924. ISBN 978-1-5090-4183-1. S2CID 11938646.
  25. ^ Singer, A.; Zhao, Z.; Shkolnisky, Y.; Hadani, R. (2011-01-01). "Viewing Angle Classification of Cryo-Electron Microscopy Images Using Eigenvectors". SIAM Journal on Imaging Sciences. 4 (2): 723–759. doi:10.1137/090778390. PMC 3325115. PMID 22506089.

External links[edit]