Radio resource management
Radio resource management (RRM) is the system level control of co-channel interference and other radio transmission characteristics in wireless communication systems, for example cellular networks, wi...
Code division multiple access
Code division multiple access (CDMA) is a channel access method used by various radio communication technologies.CDMA is an example of multiple access, which is where several transmitters can send inf...
Software-defined radio
Software-defined radio (SDR) is a radio communication system where components that have been typically implemented in hardware (e.g. mixers, filters, amplifiers, modulators/demodulators, detectors, et...
Multi-user MIMO
In radio, multi-user MIMO (MU-MIMO) is a set of advanced MIMO (pronounced mee-moh or my-moh), multiple-input and multiple-output, technologies where the available antennas are spread over a multitude ...
Erlang (unit)
The erlang (symbol E) is a dimensionless unit that is used in telephony as a measure of offered load or carried load on service-providing elements such as telephone circuits or telephone switching equ...
Radio Link Protocol
Radio Link Protocol (RLP) is an automatic repeat request (ARQ) fragmentation protocol used over a wireless (typically cellular) air interface. Most wireless air interfaces are tuned to provide 1% pack...
3G MIMO
3G MIMO describes MIMO techniques which have been considered as 3G standard techniques.MIMO, as the state of the art of Intelligent antenna (IA), improves the performance of radio systems by embedding...
Transmit diversity
Transmit diversity is radio communication using signals that originate from two or more independent sources that have been modulated with identical information-bearing signals and that may vary in the...
Space-division multiple access
Space-division multiple access (SDMA) is a channel access method based on creating parallel spatial pipes next to higher capacity pipes through spatial multiplexing and/or diversity, by which it is ab...
Proportionally fair
Proportional fair is a compromise-based scheduling algorithm. It is based upon maintaining a balance between two competing interests: Trying to maximize total [wired/wireless network] throughput while...
Overlap zone
An overlap zone, in radio frequency engineering, is a zone in which the signals from two or more radio stations, transmitting at the same frequency, can be received with comparable intensity. Interfer...
Software GNSS receiver
A GNSS receiver is an electronic device that receives and digitally processes the signals from a GNSS satellite constellation in order to provide position, velocity and time (of the receiver).There a...
Link adaptation
Link adaptation, or adaptive modulation and coding (AMC), is a term used in wireless communications to denote the matching of the modulation, coding and other signal and protocol parameters to the con...
Selectable Mode Vocoder
Selectable Mode Vocoder (SMV) is variable bitrate speech coding standard used in CDMA2000 networks. SMV provides multiple modes of operation that are selected based on input speech characteristics.The...
Spatial multiplexing
Spatial multiplexing (seen abbreviated SM or SMX) is a transmission technique in MIMO wireless communication to transmit independent and separately encoded data signals, so-called streams, from each o...
Spatial multiplexing - Wikipedia
Reconfigurability
Reconfigurability denotes the Reconfigurable Computing capability of a system, so that its behavior can be changed by reconfiguration, i. e. by loading different configware code. This static reconfigu...
Rake receiver
A rake receiver is a radio receiver designed to counter the effects of multipath fading. It does this by using several "sub-receivers" called fingers, that is, several correlators each assigned to a d...
Macrodiversity
In the field of wireless communication, macrodiversity is a kind of space diversity scheme using several receiver antennas and/or transmitter antennas for transferring the same signal. The distance be...
Macrodiversity - Wikipedia
LTR Standard and Passport
LTR Standard and Passport systems are hybrid Trunked Radio Systems that have some LTR Standard talkgroups and some LTR Passport talkgroups.
Space-time block coding based transmit diversity
Space-time block coding based transmit diversity (STTD) is a method of transmit diversity used in UMTS third-generation cellular systems. STTD is optional in the UTRAN air interface but mandatory for...
Virtual Antenna Mapping
Virtual Antenna Mapping (VAM) is used in wireless telecom networks. Typically when MIMO is deployed using two power amplifiers for two transmit antennas, there is a risk that both power amplifiers are...
Virtual Antenna Mapping - Wikipedia
Cellular traffic
This article discusses the mobile cellular network aspect of teletraffic measurements. Mobile radio networks have traffic issues that do not arise in connection with the fixed line PSTN. Important asp...
Single antenna interference cancellation
Single antenna interference cancellation (SAIC) is a promising technology to boost the capacity of GSM networks without any needed change in the network.It is very much in the interest of the network ...
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. CDMA techniques (also ...
CDMA spectral efficiency - Wikipedia
Signal-to-interference ratio
The signal-to-interference ratio (S/I or SIR), also known as the carrier-to-interference ratio (C/I, CIR), is the quotient between the average received modulated carrier power S or C and the average r...
Channel allocation schemes
In radio resource management for wireless and cellular network, channel allocation schemes are required to allocate bandwidth and communication channels to base stations, access points and terminal eq...
Soft handover
Soft handover or soft handoff refers to a feature used by the CDMA and W-CDMA standards, where a cell phone is simultaneously connected to two or more cells (or cell sectors) during a call. If the sec...
Soft handover - Wikipedia
AAA protocol
The Diameter protocol refers to a security architecture for distributed systems for controlling which users are allowed access to which services, and tracking which resources they have used. Two netw...
San Diego County-Imperial County Regional Communications System
The San Diego County-Imperial County Regional Communications System, known locally as the RCS, provides wireless 800 MHz voice (radio) and data communications—on separate networks—to over ...