Welcome to the Wireless Terms page of RF Engineer Network. This glossary is designed to provide clear and concise definitions of common terms and acronyms used in the field of wireless communication. Whether you're a student, professional, or enthusiast, this resource aims to enhance your understanding of key concepts in RF engineering.
A
Adjacent Channel Interference
Interference resulting from energy in a transmitting channel spilling over into an adjacent channel. Mitigation techniques include applying filters or using non-adjacent frequency channels within a cell.
AMPS (Advanced Mobile Phone System)
An analog mobile phone system standard developed in the 1980s, primarily used in North America.
Attenuation
The reduction in strength of an RF signal as it propagates through a medium or space. Factors influencing attenuation include frequency and physical obstructions.
B
Bandwidth
The range of frequencies allocated for a specific transmission. For instance, a standard cellular channel typically has a bandwidth of 30 kHz.
Base Station
A fixed transceiver that serves as the central communication point within a cell, handling all incoming and outgoing calls.
C
CDMA (Code Division Multiple Access)
A multiple access method where each call is encoded with a unique key and transmitted over a wide frequency band, allowing multiple calls to occupy the same channel simultaneously.
Cell
The basic geographic unit of a cellular system, defined by the coverage area of a base station.
Cochannel Interference
Interference between two transmitters using the same frequency channel, often mitigated by strategic frequency planning and cell site placement.
D
Duplex
A communication system that allows simultaneous two-way communication.
Diversity Reception
A technique used to improve signal quality by receiving multiple versions of the same signal through different antennas or paths.
E
ESN (Electronic Serial Number)
A unique identifier assigned to each mobile device, used for authentication and tracking.
EIRP (Effective Isotropic Radiated Power)
The total power radiated by a transmitter, assuming it radiates equally in all directions.
F
FDMA (Frequency Division Multiple Access)
A channel access method that assigns individual channels to separate users based on different frequency bands.
Fading
Variations in signal strength over time or distance, often caused by environmental factors such as terrain or atmospheric conditions.
G
GSM (Global System for Mobile Communications)
A standard developed to describe protocols for second-generation (2G) digital cellular networks.
Guard Band
A frequency range that separates two ranges of wider frequency to prevent interference.
H
Handoff
The process of transferring an active call or data session from one cell site to another without interruption.
Hertz (Hz)
The unit of frequency, equal to one cycle per second.
I
Intermodulation
The phenomenon where multiple signals mix together, creating additional unwanted frequencies.
ITU (International Telecommunication Union)
A specialized agency of the United Nations responsible for issues related to information and communication technologies.
J
Jitter
The variation in time delay in the arrival of packets over a network, affecting the quality of communication.
Jam
Deliberate transmission of radio signals to disrupt communications by decreasing the signal-to-noise ratio.
K
Kilohertz (kHz)
A unit of frequency equal to one thousand hertz.
K-factor
A parameter that describes the curvature of the Earth in radio propagation calculations.
L
Latency
The time delay between the transmission and reception of a signal.
Line of Sight (LOS)
A direct path between a transmitter and receiver without any obstructions.
M
MIMO (Multiple Input Multiple Output)
A technology that uses multiple transmitters and receivers to send and receive more data simultaneously.
Modulation
The process of varying a carrier signal in order to transmit data.
N
Noise Figure (NF)
A measure of the degradation of the signal-to-noise ratio caused by components in a radio frequency signal chain.
Node
A connection point within a network that can receive, create, store, or send data along distributed network routes.
O
OFDM (Orthogonal Frequency Division Multiplexing)
A method of encoding digital data on multiple carrier frequencies to reduce interference and crosstalk.
Omnidirectional Antenna
An antenna that radiates or receives signals uniformly in all directions.
P
Propagation
The movement of radio waves through or along a medium such as air, water, or vacuum.
PSTN (Public Switched Telephone Network)
The traditional circuit-switched telephone network.
Q
QAM (Quadrature Amplitude Modulation)
A modulation scheme that conveys data by changing the amplitude of two carrier waves.
QoS (Quality of Service)
The overall performance of a network service, as experienced by the user.
R
Roaming
The ability of a mobile device to access services outside the home network.
RSSI (Received Signal Strength Indicator)
A measurement of
