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Shlomo Rakib

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Shlomo Rakib
CitizenshipDual: USA & Israel
OccupationElectrical engineer
Academic background
Alma materTechnion University
Academic work
DisciplineElectrical engineering

Shlomo Rakib is an Israeli electrical engineer known for his work on Orthogonal Time Frequency and Space (OTFS) and other engineering topics.[1][2] He is the holder of several patents and co-founder and current Chief Technology Officer of Cohere Technologies, which he had co-founded with Ronny Hadani.[3][4] He also co-founded Terayon in 1993.[5]


Rakib received a Bachelor of Science in Electrical Engineering from Technion University in Israel.[6] The university's Shlomo Rakib Fellowship Fund is named after him.[7]


In the 1980s, Rakib served as a communications engineer in the Israeli Navy.[8] Rakib also served as Chief Engineer at the communications products company PhaseCom from 1981 to 1993. As part of PhaseCom, he developed data and telephony applications.[6]

Shlomo Rakib founded Terayon in 1993 with his brother Zaki Rakib (IPO in 1998).[5][9][10][11] The company initially sold modems before developing other types of broadband technology.[12] Rakib served as the company's president and CTO.[13][14]

Rakib invented Terayon's S-CDMA technology, which is a component of the DOCSIS 2.0 cable data specification used in cable modems,[9][15][16][8]which specifies the protocols and mechanisms for providing high-speed data services over cable television networks.  S-CDMA and DOCSIS 2.0 technology allowed cable operators to provide upstream-intensive broadband applications, including voice over Internet protocol (VoIP), peer-to-peer networking, video conferencing, web hosting, video-on-demand, on-line gaming, and application services.[17]The S-CDMA technology that Rakib developed for Terayon allowed for more efficient utilization of the available bandwidth by allowing multiple signals to occupy the same frequency spectrum simultaneously - enabling higher data rates without requiring additional frequency allocations.[42] It improved security, reduced interference, allows multiple users to share the same frequency band, supports variable data rates and can adapt to changing network conditions.[18][19][20]

S-CDMA technology also allowed cable operators to offer a wider range of services, including high-speed Internet,[21]digital television,[17] and telephony.[22]

As part of Terayon, he also developed data transmission methods utilizing Asynchronous Transfer Mode (ATM) and S-CDMA.[23] Rakib resigned as Terayon's president in 2004, the same year that Terayon announced it would stop investing in its DOCSIS 2.0 product line.[24][25] The firm was acquired in 2007 by Motorola.[26][27]

In 2004, Rakib co-founded Novafora, a company that developed microprocessors for advanced video applications.[28][5] The firm acquired semiconductor and microprocessor company Transmeta in 2009 before it eventually closed in the same year.[29][30][31][27]

Rakib and Ronny Hadani co-founded Cohere Technologies in 2011.[32] They met at one of Hadani's lectures about Orthogonal Time Frequency and Space (OTFS) at the University of Texas at Austin.[33][34][35] and founded the company after Rakib devised the idea to apply OTFS to wireless technology and signal processing.[33][34] The firm focuses on wireless improvements using OTFS and the Delay-Doppler model to improve FDD/TDD spectrum performance.[34][36][37]

In 2012, Rakib founded Gainspeed, a company specializing in DAA (Distributed Access Architecture). The company was initially known as Cohere Networks before being renamed Gainspeed in 2013.[38] The firm was acquired by Nokia in 2016.

In 2021, Rakib became a member of CableLabs' Convergence Council, an advisory board focused on building convergence in the cable industry.[39][40]

Selected publications[edit]

Rakib's work has been cited by other scholars over 600 times.[41] His work has also been cited in textbooks.[42] His notable works include:

  • Rakib, S. (1997). An innovative cable modem system for broadband communication. 24 - 30. doi:10.1049/cp:19971238.
  • Zarai, Y., & Rakib, S. (2008). Hilbert space-filling by piecewise-linear index transformation. IEEE Signal Processing Letters, 15, 717-720.
  • Monk, A., Hadani, R., Tsatsanis, M., & Rakib, S. (2016). OTFS - orthogonal time frequency space. arXiv preprint arXiv:1608.02993.
  • Hadani, R., Rakib, S., Tsatsanis, M., Monk, A., Goldsmith, A. J., Molisch, A. F., & Calderbank, R. (2017, March). Orthogonal time frequency space modulation. In 2017 IEEE Wireless Communications and Networking Conference (WCNC) (pp. 1–6). IEEE.
  • Hadani, R., Rakib, S., Molisch, A., Ibars, C., Monk, A., Tsatsanis, M., Delfeld, J., Goldsmith, A. & Calderbank, R. (2017). Orthogonal Time Frequency Space (OTFS) modulation for millimeter-wave communications systems. 681-683. doi:10.1109/MWSYM.2017.8058662.
  • “Representation theoretic patterns in three dimensional cryo-electron microscopy III - Presence of Point Symmetries.” Gurevich, S., Hadani, R. and Singer, A. (In preparation).

Selected research[edit]

Rakib has been granted more than 170 patents during the last few decades.[1][43][44] Notable patents include (among others):

  • US Patent 8170392, Rakib, S.S., Bronstein, A., Bronstein, M., Devictor, G.B.M., "Method and apparatus for generation, distribution and display of interactive video content"
  • US Patent 8547988, Hadani, R. & Rakib, S.S., "Communications method employing orthonormal time-frequency shifting and spectral shaping"
  • US Patent 8879378, Hadani, R. & Rakib, S.S., "Orthonormal time-frequency shifting and spectral shaping communications method"
  • US Patent 9590779, Hadani, R. & Rakib, S.S, "Modulation and equalization in an orthonormal time-frequency shifting communications system"

See also[edit]


  1. ^ a b "Google Patents". patents.google.com.
  2. ^ US 8547988, Hadani, Ronny & Rakib, Selim Shlomo, "Communications method employing orthonormal time-frequency shifting and spectral shaping", issued 2011-05-26 
  3. ^ "Cohere Technologies' CEO Shlomo Rakib discusses OTFS and wireless modulation technology". FierceTelecom.
  4. ^ Lead, Telecom (February 2, 2021). "Cohere software improves efficiency of mobile network".
  5. ^ a b c "Terayon Founders Helm Stealthy Startup". Light Reading. August 16, 2007.
  6. ^ a b https://www.sec.gov/Archives/edgar/data/1052303/000089843001500308/d10ka.txt [bare URL plain text file]
  7. ^ "Fellowships – PRESIDENT'S REPORT 2020".
  8. ^ a b Takahashi, Dean (April 9, 1998), Terayon Modem Enters Race For High-Speed Internet Access, The Wall Street Journal
  9. ^ a b "Site not found".
  10. ^ Staff, TheMarker com (15 August 2002). "Terayon's quagmire". TheStreet.
  11. ^ California Law Business. Daily Journal Corporation. July 1998.
  12. ^ Holding, Reynolds (November 9, 2003). "Double whammy in stock fraud case / Short sellers trash, then sue, Santa Clara tech firm". SFGATE.
  13. ^ CED. International Thomson Communications. 1998.
  14. ^ America's Corporate Finance Directory 2002. National Register. September 2001. ISBN 9780872178984.
  15. ^ "Selim Shlomo Rakib Inventions, Patents and Patent Applications - Justia Patents Search". patents.justia.com.
  16. ^ "Shlomo Rakib | Technion Israel Institute of Technology - Academia.edu". technion.academia.edu.
  17. ^ a b "Terayon shot up 51% on Wall Street after its patented S-CDMA chosen for new cable coms standard". TheStreet. 2001-09-05. Retrieved 2024-05-23.
  18. ^ Enssle, J.; Halbauer, H.; Otterbach, J.; Schwörer, G. (1999). Leopold, Helmut; García, Narciso (eds.). Feasibility Model Implementation and Evaluation of an HFC S-CDMA Broadband Return Channel Concept. Lecture Notes in Computer Science. Vol. 1629. Berlin, Heidelberg: Springer. pp. 154–168. doi:10.1007/3-540-48757-3_12. ISBN 978-3-540-48757-9. {{cite book}}: |journal= ignored (help)
  19. ^ Jyh-Horng Wu; Le-Pond Chin (1997). "Synchronous fiber-optic code division multiple access networks with interference cancellations". 1997 SBMO/IEEE MTT-S International Microwave and Optoelectronics Conference. 'Linking to the Next Century'. Proceedings. Vol. 2. IEEE. pp. 471–474. doi:10.1109/SBMOMO.1997.648797. ISBN 978-0-7803-4165-4.
  20. ^ Kucur, Oğuz; Atkin, Guillermo E. (October 2, 2005). "Performance of Haar wavelet based scale-code division multiple access (HW/S-CDMA) using decorrelating multi-user detector". Computers & Electrical Engineering. 31 (7): 468–484. doi:10.1016/j.compeleceng.2005.07.004.
  21. ^ "New cable standard may triple speeds". CNET. Retrieved 2024-05-23.
  22. ^ US6122260A, Liu, Hui & Xu, Guanghan, "Smart antenna CDMA wireless communication system", issued 2000-09-19 
  23. ^ Official Gazette of the United States Patent and Trademark Office: Patents. U.S. Department of Commerce, Patent and Trademark Office. November 1999.
  24. ^ "Shlomo Rakib resigns as Terayon president - Globes". en.globes.co.il. October 3, 2004.
  25. ^ "Does Terayon's CMTS Exit Spell the End of S-CDMA?". LightReading. October 29, 2004.
  26. ^ Reardon, Marguerite. "Motorola boosts TV tech with Terayon buy". CNET.
  27. ^ a b "Cisco, Arris could regret allowing Nokia to become force in US cable". Rethink.
  28. ^ "Novafora to buy once high-flying Transmeta for $256 million". November 17, 2008.
  29. ^ "Novafora Burns Out". Light Reading. August 16, 2007.
  30. ^ "e8vk". www.sec.gov.
  31. ^ "Transmeta buyer Novafora goes under, says report". archive.ph. July 30, 2012. Archived from the original on 2012-07-30.
  32. ^ Cohere raises $35M for expansion, new wireless communications technology
  33. ^ a b "StackPath". www.mwrf.com.
  34. ^ a b c "C Spire to test Cohere OTFS technology". FierceWireless. 6 December 2017.
  35. ^ "Cohere Technologies faces big competition as it vies for 5G air interface". FierceWireless. 6 March 2016.
  36. ^ Reading 2/12/2020, News Wire Feed Light. "Cohere boasts spectrum and capacity multiplier for 4G, 5G". Light Reading.{{cite web}}: CS1 maint: numeric names: authors list (link)
  37. ^ "The Mobile Network » A tale of Open RAN innovation from Cohere Technologies". 29 June 2020.
  38. ^ June 2013, Jeff Baumgartner 07 (7 June 2013). "Cohere Becomes Gainspeed". Multichannel News.{{cite web}}: CS1 maint: numeric names: authors list (link)
  39. ^ "CableLabs takes on role of convergence catalyst". LightReading. April 16, 2021. Retrieved May 23, 2024.
  40. ^ "CableLabs launches mobile convergence initiative". Lightwave Online. 2021-04-22. Retrieved 2024-05-23.
  41. ^ "Salim Shlomo Rakib". scholar.google.com.
  42. ^ Broadband Access Technologies: ADSL/VDSL, Cable Modems, Fiber, LMDS. McGraw-Hill. 1999. ISBN 9780071350600.
  43. ^ "Shlomo RAKIB | CEO". Retrieved 2022-04-30.
  44. ^ "Google Patents". patents.google.com. Retrieved 2024-05-23.