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...
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...
AKA (security)
AKA stands for the Authentication and Key Agreement. It is a security protocol used in 3G networks.AKA is also used for one-time password generation mechanism for Digest access authentication. AKA is...
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...
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...
LTR MultiNet
LTR MultiNet Systems are APCO-16 compliant LTR Trunked Radio Systems and thus are mostly found in use as public safety systems. LTR MultiNet systems usually have one or more "status channels" that a...
Handover
In cellular telecommunications, the term handover or handoff refers to the process of transferring an ongoing call or data session from one channel connected to the core network to another channel. In...
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 ...
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...
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
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...
Diversity combining
Diversity combining is the technique applied to combine the multiple received signals of a diversity reception device into a single improved signal.
Various diversity combining techniques can be d...
Diversity combining - Wikipedia
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
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 ...
Diversity coding
Diversity coding is a particular technique for antenna diversity and is implemented by space–time coding.
Powersource
PowerSource, or "hybrid" phones, are specialized cellular devices used by customers of the American telecommunications company Sprint-Nextel. They are distinct from other mobile phones in that they m...
Motorola Trunked Radio

Motorola Type I and Type II systems achieve the same thing in a slightly different way. One important distinction between these systems is the amount of data transmitted by each radio when the op...
Precoding
Precoding is a generalization of beamforming to support multi-stream (or multi-layer) transmission in multi-antenna wireless communications. In conventional single-stream beamforming, the same signal ...