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Thomas Haug
Thomas Haug (26 April 1927 – 9 December 2023) was a Norwegian-Swedish electrical engineer known for developing the Nordic Mobile Telephone, cellular telephone networks. Early life and education Thomas Haug was born in Norway on 26 April 1927. He received a master's degree in Electrical Engineering from the Technical University of Norway in Trondheim in 1951, and a degree of Licentiate from KTH—corresponding to a PhD—from the Royal Institute of Technology in Stockholm in 1973. Professional career Haug worked at the Ericsson group in Stockholm and with Westinghouse in Baltimore, Maryland, USA, primarily on radio projects. In 1966 Haug joined the Swedish Board of Telecommunications where, together with Östen Mäkitalo and lead the joint Nordic project for cellular communications called the Nordic Mobile Telephone (NMT) system. NMT was an analog mobile phone system commercialized in 1980 in Saudi Arabia and throughout the Nordic countries through 1982, reaching 1 million s ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Nordic Mobile Telephone
NMT (''Nordic Mobile Telephony'') is an automatic cellular phone system specified by Nordic countries, Nordic telecommunications administrations (Postal Telephone and Telegraph, PTTs) and opened for service on 1 October 1981. NMT is based on analog signal, analogue technology (first generation or 1G) and two variants exist: NMT-450 and NMT-900. The numbers indicate the frequency bands used. NMT-900 was introduced in 1986 and carries more channels than the older NMT-450 network. The NMT specifications were free and open, allowing many companies to produce NMT hardware and pushing prices down. The success of NMT was important to Nokia (then Mobira) and Ericsson. The first Danish implementers were Storno (then owned by General Electric, later taken over by Motorola) and AP (later taken over by Philips). Initial NMT phones were designed to mount in the trunk of a car, with a keyboard/display unit at the driver's seat. "Portable" versions existed, though they were still bulky, and wit ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Thomas Haug
Thomas Haug (26 April 1927 – 9 December 2023) was a Norwegian-Swedish electrical engineer known for developing the Nordic Mobile Telephone, cellular telephone networks. Early life and education Thomas Haug was born in Norway on 26 April 1927. He received a master's degree in Electrical Engineering from the Technical University of Norway in Trondheim in 1951, and a degree of Licentiate from KTH—corresponding to a PhD—from the Royal Institute of Technology in Stockholm in 1973. Professional career Haug worked at the Ericsson group in Stockholm and with Westinghouse in Baltimore, Maryland, USA, primarily on radio projects. In 1966 Haug joined the Swedish Board of Telecommunications where, together with Östen Mäkitalo and lead the joint Nordic project for cellular communications called the Nordic Mobile Telephone (NMT) system. NMT was an analog mobile phone system commercialized in 1980 in Saudi Arabia and throughout the Nordic countries through 1982, reaching 1 million s ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
European Conference Of Postal And Telecommunications Administrations
The European Conference of Postal and Telecommunications Administrations (CEPT) was established on 26 June 1959 by nineteen European states in Montreux, Switzerland, as a coordinating body for European state telecommunications and postal organizations. The acronym comes from the French version of its name, . CEPT was responsible for the creation of the European Telecommunications Standards Institute (ETSI) in 1988. Organization CEPT is organised into three main components: * Electronic Communications Committee (ECC) – responsible for radiocommunications and telecommunications matters and formed by the merger of ECTRA (European Committee for Telecommunications Regulatory Affairs) and ERC (European Radiocommunications Committee) in September 2001 **The permanent secretariat of the ECC is the European Communications Office (ECO) * European Committee for Postal Regulation (CERP, after the French ''"Comité européen des régulateurs postaux"'') – responsible for postal matt ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
ETSI
The European Telecommunications Standards Institute (ETSI) is an independent, not-for-profit, standardization organization operating in the field of Information and communications technology, information and communications. ETSI supports the development and testing of global technical standards for ICT-enabled systems, applications and services. Overview and history ETSI was set up in 1988 by the European Conference of Postal and Telecommunications Administrations (European Conference of Postal and Telecommunications Administrations, CEPT) following a proposal from the European Commission (EC). ETSI is the officially recognized body with a responsibility for the standardization of information and communication technologies (ICT). It is one of the three bodies officially recognized by the European Union as a European Standards Organisation (ESO), the others being European Committee for Standardization, CEN and CENELEC. The role of the ESOs is to support EU regulation and policies ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Subscriber Identity Module
A typical SIM card (mini-SIM with micro-SIM cutout)A SIM card or SIM (subscriber identity module) is an integrated circuit (IC) intended to securely store an international mobile subscriber identity (IMSI) number and its related key, which are used to identify and authenticate subscribers on mobile telephone devices (such as mobile phones, tablets, and laptops). SIMs are also able to store address book contacts information, and may be protected using a PIN code to prevent unauthorized use. SIMs are always used on GSM phones; for CDMA phones, they are needed only for LTE-capable handsets. SIM cards are also used in various satellite phones, smart watches, computers, or cameras. The first SIM cards were the size of credit and bank cards; sizes were reduced several times over the years, usually keeping electrical contacts the same, to fit smaller-sized devices. SIMs are transferable between different mobile devices by removing the card itself. Technically, the actual physic ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
UMTS
The Universal Mobile Telecommunications System (UMTS) is a 3G mobile cellular system for networks based on the GSM standard. UMTS uses Wideband Code Division Multiple Access, wideband code-division multiple access (W-CDMA) radio access technology to offer greater spectral efficiency and bandwidth to mobile network operators compared to previous 2G systems like GPRS and Circuit Switched Data, CSD. UMTS on its provides a peak theoretical data rate of 2 Data-rate units, Mbit/s. Developed and maintained by the 3GPP (3rd Generation Partnership Project), UMTS is a component of the International Telecommunication Union IMT-2000 standard set and compares with the CDMA2000 standard set for networks based on the competing IS-95, cdmaOne technology. The technology described in UMTS is sometimes also referred to as Freedom of Mobile Multimedia Access (FOMA) or 3GSM. UMTS specifies a complete network system, which includes the radio access network (UMTS Terrestrial Radio Access Network, or U ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
LTE (telecommunication)
In telecommunications, long-term evolution (LTE) is a standard for wireless broadband communication for cellular mobile devices and data terminals. It is considered to be a "transitional" 4G technology, and is therefore also referred to as 3.95G as a step above 3G. LTE is based on the 2G GSM/ EDGE and 3G UMTS/ HSPA standards. It improves on those standards' capacity and speed by using a different radio interface and core network improvements. LTE is the upgrade path for carriers with both GSM/UMTS networks and CDMA2000 networks. LTE has been succeeded by LTE Advanced, which is officially defined as a "true" 4G technology and also named "LTE+". Terminology The standard is developed by the 3GPP (3rd Generation Partnership Project) and is specified in its Release 8 document series, with minor enhancements described in Release 9. LTE is also called 3.95G and has been marketed as 4G LTE and Advanced 4G; but the original version did not meet the technical criteria of a 4G wire ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sollentuna Municipality
Sollentuna Municipality (; ) is a municipalities of Sweden, municipality in Stockholm County in east-central Sweden, north of Stockholm. Its seat of local government is located in Tureberg, which is a part of Sollentuna urban area. Geography Sollentuna borders the municipalities of Solna Municipality, Solna, Sundbyberg Municipality, Sundbyberg, Stockholm Municipality, Stockholm, Järfälla Municipality, Järfälla, Upplands Väsby Municipality, Upplands Väsby, Täby Municipality, Täby and Danderyd Municipality, Danderyd in clockwise order starting to the south. Localities and districts Since 1995, the bulk of the built-up area of the municipality has been statistically included in the multimunicipal city of Stockholm. A few houses on the eastern border (with about 10 inhabitants) are in Täby urban area. Sjöberg, Sweden, Sjöberg constitutes a locality of its own. The municipality is subdivided into the following districts according to population as of 31 December 202ref ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Charles Stark Draper Prize
The U.S. National Academy of Engineering annually awards the Draper Prize, which is given for the advancement of engineering and the education of the public about engineering. It is one of three prizes that constitute the "Nobel Prizes of Engineering"—the others are the Academy's Russ and Gordon Prizes. The Draper Prize is awarded biennially and the winner of each of these prizes receives $500,000. The Draper prize is named for Charles Stark Draper, the "father of inertial navigation", an MIT professor and founder of Draper Laboratory. Past winners * 1989: Jack S. Kilby and Robert N. Noyce for their independent development of the monolithic integrated circuit * 1991: Sir Frank Whittle and Hans von Ohain for their independent development of the turbojet engine * 1993: John Backus for his development of FORTRAN, the first widely used, general purpose, high-level computer language * 1995: John R. Pierce and Harold A. Rosen for their development of communication satellite ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Joel S
Joel or Yoel is a name meaning "Yahweh Is God" in Hebrew and may refer to: * Joel (given name), including a list of people named Joel or Yoel * Joel (surname), a surname * Joel (footballer, born 1904), Joel de Oliveira Monteiro, Brazilian football goalkeeper * Joel (footballer, born 1980), Joel Bertoti Padilha, Brazilian football centre-back * Joel (prophet), a prophet of ancient Israel ** Book of Joel, a book in the Jewish Tanakh, and in the Christian Bible, ascribed to the prophet * Joel, Georgia Joel is an unincorporated community in Carroll County, in the U.S. state of Georgia Georgia most commonly refers to: * Georgia (country), a country in the South Caucasus * Georgia (U.S. state), a state in the southeastern United States Geor ..., a community in the United States * Joel, Wisconsin, a community in the United States {{disambiguation, hn, geo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Martin Cooper (inventor)
Martin Cooper (born December 26, 1928) is an American engineer. He is a pioneer in the wireless communications industry, especially in radio spectrum management, with eleven patents in the field.Encyclopedia of World Biography, 2008 encyclopedia.com On April 3, 1973, Cooper placed the first public call from a handheld portable cell phone while working at , from a Manhattan sidewalk to his counterpart at competitor . [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Yoshihisa Okumura
Yoshihisa Okumura (; 2 July 1926 – 18 February 2023) was a Japanese engineer, known for development of radio propagation models, cellular telephone networks. His radio survey of signal strength as a function of distance as measured in drive tests in automobiles was critical to the system planning of mobile radio telephone systems. Professional career Okumura was born in Isikawa Prefecture on 2 July 1926. He studied electrical engineering at Kanazawa Technical College (金沢工業専門学校 Kanazawa kōgyō senmon gakkō, formerly the faculty of engineering of Kanazawa University) from 1944 to 1947. Okumura began his professional career in 1950 with Nippon Telegraph and Telephone, Nippon Telegraph and Telephone Public Corporation (NTT, now privatised), where he collected radio propagation data in the 150 to 1920 MHz bands. These bands were later identified as appropriate for mobile phone systems (in no small part, because of the data collected by Okumura). Okumura's ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
