Shlomo Rakib | |
---|---|
Born | Israel |
Citizenship | Dual: USA & Israel |
Occupation | Electrical engineer |
Academic background | |
Alma mater | Technion University |
Academic work | |
Discipline | Electrical 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]
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 has been granted more than 170 patents during the last few decades. [1] [43] [44] Notable patents include (among others):
In telecommunications, orthogonal frequency-division multiplexing (OFDM) is a type of digital transmission used in digital modulation for encoding digital (binary) data on multiple carrier frequencies. OFDM has developed into a popular scheme for wideband digital communication, used in applications such as digital television and audio broadcasting, DSL internet access, wireless networks, power line networks, and 4G/5G mobile communications.
Digital subscriber line is a family of technologies that are used to transmit digital data over telephone lines. In telecommunications marketing, the term DSL is widely understood to mean asymmetric digital subscriber line (ADSL), the most commonly installed DSL technology, for Internet access.
Frequency-shift keying (FSK) is a frequency modulation scheme in which digital information is encoded on a carrier signal by periodically shifting the frequency of the carrier between several discrete frequencies. The technology is used for communication systems such as telemetry, weather balloon radiosondes, caller ID, garage door openers, and low frequency radio transmission in the VLF and ELF bands. The simplest FSK is binary FSK, in which the carrier is shifted between two discrete frequencies to transmit binary information.
A cable modem is a type of network bridge that provides bi-directional data communication via radio frequency channels on a hybrid fibre-coaxial (HFC), radio frequency over glass (RFoG) and coaxial cable infrastructure. Cable modems are primarily used to deliver broadband Internet access in the form of cable Internet, taking advantage of the high bandwidth of a HFC and RFoG network. They are commonly deployed in the Americas, Asia, Australia, and Europe.
In telecommunications and computer networks, a channel access method or multiple access method allows more than two terminals connected to the same transmission medium to transmit over it and to share its capacity. Examples of shared physical media are wireless networks, bus networks, ring networks and point-to-point links operating in half-duplex mode.
Multichannel multipoint distribution service (MMDS), formerly known as broadband radio service (BRS) and also known as wireless cable, is a wireless telecommunications technology, used for general-purpose broadband networking or, more commonly, as an alternative method of cable television programming reception.
Data Over Cable Service Interface Specification (DOCSIS) is an international telecommunications standard that permits the addition of high-bandwidth data transfer to an existing cable television (CATV) system. It is used by many cable television operators to provide cable Internet access over their existing hybrid fiber-coaxial (HFC) infrastructure.
Broadband over power lines (BPL) is a method of power-line communication (PLC) that allows relatively high-speed digital data transmission over public electric power distribution wiring. BPL uses higher frequencies, a wider frequency range, and different technologies compared to other forms of power-line communications to provide high-rate communication over longer distances. BPL uses frequencies that are part of the radio spectrum allocated to over-the-air communication services; therefore, the prevention of interference to, and from, these services is a very important factor in designing BPL systems.
Evolution-Data Optimized is a telecommunications standard for the wireless transmission of data through radio signals, typically for broadband Internet access. EV-DO is an evolution of the CDMA2000 (IS-2000) standard which supports high data rates and can be deployed alongside a wireless carrier's voice services. It uses advanced multiplexing techniques including code-division multiple access (CDMA) as well as time-division multiplexing (TDM) to maximize throughput. It is a part of the CDMA2000 family of standards and has been adopted by many mobile phone service providers around the world particularly those previously employing CDMA networks. It is also used on the Globalstar satellite phone network.
A cable modem termination system is a piece of equipment, typically located in a cable company's headend or hubsite, which is used to provide data services, such as cable Internet or Voice over IP, to cable subscribers. A CMTS provides many of the same functions provided by the DSLAM in a DSL system.
Orthogonal frequency-division multiple access (OFDMA) is a multi-user version of the popular orthogonal frequency-division multiplexing (OFDM) digital modulation scheme. Multiple access is achieved in OFDMA by assigning subsets of subcarriers to individual users. This allows simultaneous low-data-rate transmission from several users.
Terayon Communication Systems, Inc. was a company that vended equipment to broadband service providers for delivering broadband voice, video and data services to residential and business subscribers.
Multi-carrier code-division multiple access (MC-CDMA) is a multiple access scheme used in OFDM-based telecommunication systems, allowing the system to support multiple users at the same time over same frequency band.
The Multimedia over Coax Alliance (MoCA) is an international standards consortium that publishes specifications for networking over coaxial cable. The technology was originally developed to distribute IP television in homes using existing cabling, but is now used as a general-purpose Ethernet link where it is inconvenient or undesirable to replace existing coaxial cable with optical fiber or twisted pair cabling.
International Mobile Telecommunications-Advanced are the requirements issued by the ITU Radiocommunication Sector (ITU-R) of the International Telecommunication Union (ITU) in 2008 for what is marketed as 4G mobile phone and Internet access service.
Multiple-input, multiple-output orthogonal frequency-division multiplexing (MIMO-OFDM) is the dominant air interface for 4G and 5G broadband wireless communications. It combines multiple-input, multiple-output (MIMO) technology, which multiplies capacity by transmitting different signals over multiple antennas, and orthogonal frequency-division multiplexing (OFDM), which divides a radio channel into a large number of closely spaced subchannels to provide more reliable communications at high speeds. Research conducted during the mid-1990s showed that while MIMO can be used with other popular air interfaces such as time-division multiple access (TDMA) and code-division multiple access (CDMA), the combination of MIMO and OFDM is most practical at higher data rates.
Orthogonal Time Frequency Space (OTFS) is a 2D modulation technique that transforms the information carried in the Delay-Doppler coordinate system. The information is transformed in the similar time-frequency domain as utilized by the traditional schemes of modulation such as TDMA, CDMA, and OFDM. It was first used for fixed wireless, and is now a contending waveform for 6G technology due to its robustness in high-speed vehicular scenarios.
Ronny Hadani is an Israeli-American mathematician, specializing in representation theory and harmonic analysis, with applications to signal processing. He is known for developing Orthogonal Time Frequency and Space (OTFS) modulating techniques, a method used for making wireless 5G communications faster, that is also being considered for use in 6G technology. The technology is being used by several wireless 5G related companies and Cohere Technologies, a company he has co-founded.
Delay Doppler coordinates are coordinates typically used in a radar technology-inspired approach to measurement. When used in wireless communication, the Delay Doppler domain mirrors the geometry of the reflectors comprising the wireless channel, which changes far more slowly than the phase changes experienced in the rapidly varying time-frequency domain.
Cohere Technologies is a telecoms software company based in San Jose, California that develops technology for boosting the network performance of 4G and 5G spectrum in wireless networks. Cohere holds the patents for the Orthogonal Time Frequency Space (OTFS) 2D modulation technique used to improve the performance of 4G and 5G networks and is being considered as a waveform for the future 6G wireless standard.
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