Gregory Raleigh
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Gregory “Greg” Raleigh (born 1961 in
Orange, California Orange is a city located in North Orange County, California. It is approximately north of the county seat, Santa Ana. Orange is unusual in this region because many of the homes in its Old Town District were built before 1920. While many othe ...
), is an American radio
scientist A scientist is a person who conducts scientific research to advance knowledge in an area of the natural sciences. In classical antiquity, there was no real ancient analog of a modern scientist. Instead, philosophers engaged in the philosophica ...
,
inventor An invention is a unique or novel device, method, composition, idea or process. An invention may be an improvement upon a machine, product, or process for increasing efficiency or lowering cost. It may also be an entirely new concept. If an id ...
, and
entrepreneur Entrepreneurship is the creation or extraction of economic value. With this definition, entrepreneurship is viewed as change, generally entailing risk beyond what is normally encountered in starting a business, which may include other values t ...
who has made contributions in the fields of
wireless communication Wireless communication (or just wireless, when the context allows) is the transfer of information between two or more points without the use of an electrical conductor, optical fiber or other continuous guided medium for the transfer. The mos ...
,
information theory Information theory is the scientific study of the quantification, storage, and communication of information. The field was originally established by the works of Harry Nyquist and Ralph Hartley, in the 1920s, and Claude Shannon in the 1940s. ...
,
mobile operating system A mobile operating system is an operating system for mobile phones, tablet computer, tablets, smartwatches, smartglasses, or other non-laptop personal computing, personal mobile computing devices. While computers such as typical laptops are "mobi ...
s,
medical device A medical device is any device intended to be used for medical purposes. Significant potential for hazards are inherent when using a device for medical purposes and thus medical devices must be proved safe and effective with reasonable assur ...
s, and
network virtualization In computing, network virtualization is the process of combining hardware and software network resources and network functionality into a single, software-based administrative entity, a virtual network. Network virtualization involves platform vi ...
. His discoveries and inventions include the first wireless communication channel model to accurately predict the performance of advanced antenna systems, the MIMO-OFDM technology used in contemporary
Wi-Fi Wi-Fi () is a family of wireless network protocols, based on the IEEE 802.11 family of standards, which are commonly used for local area networking of devices and Internet access, allowing nearby digital devices to exchange data by radio w ...
and 4G wireless networks and devices, higher accuracy radiation beam therapy for cancer treatment, improved 3D surgery imaging, and a cloud-based
Network Functions Virtualization Network functions virtualization (NFV) is a network architecture concept that leverages the IT virtualization technologies to virtualize entire classes of network node functions into building blocks that may connect, or chain together, to create and ...
platform for mobile network operators that enables users to customize and modify their smartphone services.


Biography

Raleigh received a B.S.E.E.
degree Degree may refer to: As a unit of measurement * Degree (angle), a unit of angle measurement ** Degree of geographical latitude ** Degree of geographical longitude * Degree symbol (°), a notation used in science, engineering, and mathemati ...
from the
California Polytechnic State University California Polytechnic State University, San Luis Obispo (California Polytechnic State University, Cal Poly"Cal Poly" may also refer to California State Polytechnic University, Humboldt in Arcata, California or California State Polytechnic Univ ...
, an M.S.E.E. degree from Stanford University, and a Ph.D. from Stanford University. He joined
Watkins-Johnson Company Watkins-Johnson Company was a designer and manufacturer of electronic devices, systems, and equipment. The company, commonly referred to as "W-J", was formed in 1957 by Dean A. Watkins and H. Richard Johnson, and was headquartered in Palo Alto, Ca ...
in 1984 as a Radio Engineer and rose to Chief Scientist and Vice President of Research and Development. Raleigh subsequently co-founded five companies: Clarity Wireless,
Airgo Networks Airgo Networks (formerly Woodside Networks), is a Palo Alto, California-based company specializing in the development of multiple-input multiple-output (MIMO) wireless technology. Airgo Networks was founded in 2001 by Gregory Raleigh, V.K. Jones, ...
, Headwater Research, ItsOn, and Chilko Capital. In wireless communications, Raleigh developed a comprehensive and precise channel model that works with multiple antennas. He employed the model to develop smart antenna signal processing techniques for rapid fading, multipath propagation, and frequency-division duplex environments. As a result of this research, Raleigh found that multipath propagation could be exploited to greatly increase the capacity of wireless communications, enabling data rates competitive with wire-based networks. In a paper prepared for the 1996 GLOBECOM conference in London, Raleigh presented the first rigorous mathematical proof that in the presence of naturally occurring multipath propagation multiple antennas may be used with special signal processing techniques to transmit multiple data streams at the same time on the same frequency, multiplying the information-carrying capacity (data rate) of wireless links. From the time of
Guglielmo Marconi Guglielmo Giovanni Maria Marconi, 1st Marquis of Marconi (; 25 April 187420 July 1937) was an Italian inventor and electrical engineer, known for his creation of a practical radio wave-based wireless telegraph system. This led to Marconi b ...
, multipath propagation had always been treated as a problem to be overcome. The discovery that multipath can be harnessed to increase performance reversed a century of radio engineering practice. In subsequent papers, Raleigh proposed a series of enhancements including the use of OFDM with MIMO and techniques for space-frequency coding, space-frequency-time channel estimation, and MIMO synchronization. These inventions were incorporated into the
LTE LTE may refer to: Science and technology * LTE (telecommunication) (Long-Term Evolution), a telephone and mobile broadband standard ** LTE Advanced, an enhancement *** LTE Advanced Pro * Compaq LTE, a line of laptop computers produced by Compaq * ...
,
WiMAX Worldwide Interoperability for Microwave Access (WiMAX) is a family of wireless broadband communication standards based on the IEEE 802.16 set of standards, which provide physical layer (PHY) and media access control (MAC) options. The WiMA ...
, 802.11n and
802.11ac IEEE 802.11ac-2013 or 802.11ac is a wireless networking standard in the IEEE 802.11 set of protocols (which is part of the Wi-Fi networking family), providing high-throughput wireless local area networks (WLANs) on the 5 GHz band. The stand ...
standards. Raleigh, V.K. Jones, and Michael Pollack founded Clarity Wireless in 1996. Clarity built a MIMO demonstration link and developed a related technology, vector
orthogonal frequency-division multiplexing In telecommunications, orthogonal frequency-division multiplexing (OFDM) is a type of digital transmission and a method of encoding digital data on multiple carrier frequencies. OFDM has developed into a popular scheme for wideband digital comm ...
(V-OFDM). Clarity Wireless was acquired by
Cisco Systems Cisco Systems, Inc., commonly known as Cisco, is an American-based multinational corporation, multinational digital communications technology conglomerate (company), conglomerate corporation headquartered in San Jose, California. Cisco develo ...
in 1998. Raleigh, Jones, and David Johnson founded Airgo Networks in 2001 to develop MIMO-OFDM chipsets for
wireless LAN A wireless LAN (WLAN) is a wireless computer network that links two or more devices using wireless communication to form a local area network (LAN) within a limited area such as a home, school, computer laboratory, campus, or office building ...
s. Airgo Networks proposed MIMO as the best technology for meeting the performance goals of next-generation wireless LANs and contributed to the development of the IEEE 802.11n standard. The company began shipping the world’s first MIMO-OFDM chipsets in 2003. While at Airgo Networks, Raleigh was named to Network World’s “The 50 most powerful people in networking.” Airgo Networks was purchased by Qualcomm in 2006. Raleigh co-founded the technology innovation firm Headwater Research in late 2008 with Charles Giancarlo and became Lead Director of its board. Raleigh’s inventions at Headwater have spanned the wireless and medical device fields. The inventions include mobile device operating system enhancements, improvements to radiation beam therapy for cancer treatment, enhanced 3-D imaging systems for surgery, and cloud-based network function virtualization (NFV) advances. Mobile OS controls and NFV are now widely deployed. In late 2009, Raleigh and Giancarlo spun out ItsOn to license and commercialize wireless technology, with Raleigh serving as the firm’s first CEO. ItsOn developed a cloud-based network function virtualization (NFV) platform that enables operators to implement intelligent, user context-aware policies including the ability for users to customize and manage their mobile phone services. ItsOn’s service, called Zact, launched in May 2013. Raleigh holds more than 200 US patents and over 150 international patents in the fields of radio communications, medical devices, mobile device operating systems, radar systems, and mobile network function virtualization.


References

{{DEFAULTSORT:Raleigh, Gregory G. American electrical engineers California Polytechnic State University alumni Stanford University alumni People from Orange, California Wireless technology people Living people 1961 births Engineers from California 21st-century American inventors