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45 relations: Altai (mobile telephone system), Ambiguity function, Bandwidth (signal processing), Bit error rate, Cambridge University Press, CDMA spectral efficiency, CDMA2000, CdmaOne, Central limit theorem, Channel access method, Chip (CDMA), Comparison of mobile phone standards, Convolutional code, Coordinate vector, Cross-correlation, Dmitry Vasiliyevich Ageev, Doppler effect, Dot product, Gilbert cell, Global Positioning System, Globalstar, Gold code, GSM, Guowang Miao, Hadamard code, Leonid Kupriyanovich, Logistics, Mobile phone, Nauka i Zhizn, Noise, Orthogonality, Process gain, Pseudorandom noise, Quadrature-division multiple access, Qualcomm, Radio, Rake receiver, Soviet Union, Spread spectrum, Tekhnika Molodezhi, UMTS, Walsh function, Walsh matrix, Wiener–Khinchin theorem, 3G.
Altai (mobile telephone system)
The Altai mobile telephone system is the pre-cellular 0G radiotelephone service that was first introduced in the Soviet Union in 1963, and became available in the most large cities by 1965.
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Ambiguity function
In pulsed radar and sonar signal processing, an ambiguity function is a two-dimensional function of time delay and Doppler frequency \chi(\tau,f) showing the distortion of a returned pulse due to the receiver matched filter (commonly, but not exclusively, used in pulse compression radar) due to the Doppler shift of the return from a moving target.
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Bandwidth (signal processing)
Bandwidth is the difference between the upper and lower frequencies in a continuous band of frequencies.
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Bit error rate
In digital transmission, the number of bit errors is the number of received bits of a data stream over a communication channel that have been altered due to noise, interference, distortion or bit synchronization errors.
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Cambridge University Press
Cambridge University Press (CUP) is the publishing business of the University of Cambridge.
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CDMA spectral efficiency
CDMA spectral efficiency refers to the system spectral efficiency in bit/s/Hz/site or Erlang/MHz/site that can be achieved in a certain CDMA based wireless communication system.
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CDMA2000
CDMA2000 (also known as C2K or IMT Multi‑Carrier (IMT‑MC)) is a family of 3G mobile technology standards for sending voice, data, and signaling data between mobile phones and cell sites.
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CdmaOne
Interim Standard 95 (IS-95) was the first ever CDMA-based digital cellular technology.
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Central limit theorem
In probability theory, the central limit theorem (CLT) establishes that, in some situations, when independent random variables are added, their properly normalized sum tends toward a normal distribution (informally a "bell curve") even if the original variables themselves are not normally distributed.
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Channel access method
In telecommunications and computer networks, a channel access method or multiple access method allows several terminals connected to the same multi-point transmission medium to transmit over it and to share its capacity.
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Chip (CDMA)
In digital communications, a chip is a pulse of a direct-sequence spread spectrum (DSSS) code, such as a Pseudo-random Noise (PN) code sequence used in direct-sequence code division multiple access (CDMA) channel access techniques.
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Comparison of mobile phone standards
This is a comparison of standards of mobile phones.
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Convolutional code
In telecommunication, a convolutional code is a type of error-correcting code that generates parity symbols via the sliding application of a boolean polynomial function to a data stream.
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Coordinate vector
In linear algebra, a coordinate vector is a representation of a vector as an ordered list of numbers that describes the vector in terms of a particular ordered basis.
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Cross-correlation
In signal processing, cross-correlation is a measure of similarity of two series as a function of the displacement of one relative to the other.
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Dmitry Vasiliyevich Ageev
Dmitry Vasiliyevich Ageev (Дмитрий Василиевич Агеев; 21 February 1911, Saint Petersburg, Russian Empire – 31 July 1997, Nizhny Novgorod, Russia) was an outstanding Russian scientist and educator in the field of radio engineering.
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Doppler effect
The Doppler effect (or the Doppler shift) is the change in frequency or wavelength of a wave in relation to observer who is moving relative to the wave source.
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Dot product
In mathematics, the dot product or scalar productThe term scalar product is often also used more generally to mean a symmetric bilinear form, for example for a pseudo-Euclidean space.
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Gilbert cell
In electronics, the Gilbert cell is a type of mixer.
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Global Positioning System
The Global Positioning System (GPS), originally Navstar GPS, is a satellite-based radionavigation system owned by the United States government and operated by the United States Air Force.
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Globalstar
Globalstar is a low Earth orbit (LEO) satellite constellation for satellite phone and low-speed data communications, somewhat similar to the Iridium satellite constellation and Orbcomm satellite systems.
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Gold code
A Gold code, also known as Gold sequence, is a type of binary sequence, used in telecommunication (CDMA) and satellite navigation (GPS).
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GSM
GSM (Global System for Mobile communications) is a standard developed by the European Telecommunications Standards Institute (ETSI) to describe the protocols for second-generation digital cellular networks used by mobile devices such as tablets, first deployed in Finland in December 1991.
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Guowang Miao
Guowang Miao is an associate professor at KTH Royal Institute of Technology, Sweden, working on design and optimization of wireless communications and networking and the author of Fundamentals of Mobile Data Networks and Energy and Spectrum Efficient Wireless Network Design.
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Hadamard code
The Hadamard code is an error-correcting code named after Jacques Hadamard that is used for error detection and correction when transmitting messages over very noisy or unreliable channels.
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Leonid Kupriyanovich
Leonid Ivanovich Kupriyanovich (14 July 1929 – 1 January 1996) was a Soviet engineer from Moscow who is credited for early development of a mobile phone device.
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Logistics
Logistics is generally the detailed organization and implementation of a complex operation.
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Mobile phone
A mobile phone, known as a cell phone in North America, is a portable telephone that can make and receive calls over a radio frequency link while the user is moving within a telephone service area.
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Nauka i Zhizn
Nauka i Zhizn (Science and Life, Наука и жизнь) is a science magazine first issued during the years 1890-1900 in Imperial Russia, and then since 1934 in the Soviet Union (and continued in the Russian Federation today).
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Noise
Noise is unwanted sound judged to be unpleasant, loud or disruptive to hearing.
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Orthogonality
In mathematics, orthogonality is the generalization of the notion of perpendicularity to the linear algebra of bilinear forms.
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Process gain
In a spread-spectrum system, the process gain (or "processing gain") is the ratio of the spread (or RF) bandwidth to the unspread (or baseband) bandwidth.
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Pseudorandom noise
In cryptography, pseudorandom noise (PRN) is a signal similar to noise which satisfies one or more of the standard tests for statistical randomness.
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Quadrature-division multiple access
Quadrature-division multiple access (QDMA) is a radio protocol.
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Qualcomm
Qualcomm is an American multinational semiconductor and telecommunications equipment company that designs and markets wireless telecommunications products and services.
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Radio
Radio is the technology of using radio waves to carry information, such as sound, by systematically modulating properties of electromagnetic energy waves transmitted through space, such as their amplitude, frequency, phase, or pulse width.
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Rake receiver
A rake receiver is a radio receiver designed to counter the effects of multipath fading.
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Soviet Union
The Soviet Union, officially the Union of Soviet Socialist Republics (USSR) was a socialist state in Eurasia that existed from 1922 to 1991.
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Spread spectrum
In telecommunication and radio communication, spread-spectrum techniques are methods by which a signal (e.g., an electrical, electromagnetic, or acoustic signal) generated with a particular bandwidth is deliberately spread in the frequency domain, resulting in a signal with a wider bandwidth.
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Tekhnika Molodezhi
Tekhnika Molodezhi (Техника — молодёжи, "Technology for the Youth") is a Soviet, and eventually Russian popular science magazine which has been published monthly since 1933.
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UMTS
The Universal Mobile Telecommunications System (UMTS) is a third generation mobile cellular system for networks based on the GSM standard.
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Walsh function
In mathematics, more specifically in harmonic analysis, Walsh functions form a complete orthogonal set of functions that can be used to represent any discrete function—just like trigonometric functions can be used to represent any continuous function in Fourier analysis.
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Walsh matrix
In mathematics, a Walsh matrix is a specific square matrix of dimensions 2^n, where n are some particular natural number.
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Wiener–Khinchin theorem
In applied mathematics, the Wiener–Khinchin theorem, also known as the Wiener–Khintchine theorem and sometimes as the Wiener–Khinchin–Einstein theorem or the Khinchin–Kolmogorov theorem, states that the autocorrelation function of a wide-sense-stationary random process has a spectral decomposition given by the power spectrum of that process.
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3G
3G, short for third generation, is the third generation of wireless mobile telecommunications technology.
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Redirects here:
CDMA, Cdma, Code Division Multiple Access, Code division, Code division multiple access, Code division multiplex, Code division multiplexing, Code-division, Code-division multiplexing, IS683A, S-CDMA, S-cdma, SCDMA, Synchronous Code Division Multiple Access, Synchronous Code Division Multiple Access'.
References
[1] https://en.wikipedia.org/wiki/Code-division_multiple_access
