| kHz |
kiloHertz |
A radio frequency measurement (one kilohertz = one thousand cycles per second). |
| LAI |
Location Area Identity |
Information carried in the SIM of GSM handsets that identify the subscriber's home area. This is used for billing and sub-net operation purposes. |
| LAN |
Local Area Network |
A small data network covering a limited area, such as within a building or group of buildings. |
| LAS-CDMA |
Large Area Synchronized Code Division Multiple Access |
A technology developed by LinkAir that offers higher spectral efficiency
and moving speed for better mobile-application support.Also, its asymmetric
traffic, higher throughput, and smaller delay provide improved IP support.Currently
LAS-CDMA is being considered for phase 2 of the 1xEV standards.A LAS-CDMA
TDD variant is compatible with systems such as TD-SCDMA. |
| Lee's model |
|
A slope-intercept propagation prediction model developed at Bell Laboratories and popularized by William Lee. The model assumes an initial condition at a short distance from a base station and uses that as one end of a slope intercept model to predict path loss between a base station and a mobile unit. |
| line speed |
|
Data transmission rate over a physical or wireless medium, typically given
in number of bits per second. |
| link |
|
The radio connection between a transmitter and a receiver. |
| link budget |
|
A calculation involving the gain and loss factors associated with the antennas, transmitters, transmission lines and propagation environment used to determine the maximum distance at which a transmitter and receiver can successfully operate. |
| LMDS |
Local Multipoint Distribution System |
|
| location registration |
|
One of several computer databases used to maintain location and other information on mobile subscribers. See HLR and VLR. |
| logical channel |
|
A communications channel derived from a physical
channel. A physical channel, i.e. RF channel, typically carries a data stream
that contains several logical channels. These usually include multiple control
and traffic channels. |
| LOS |
line of sight |
A description of an unobstructed radio path or link
between the transmitting and receiving antennas of a communications system. |
| LPA |
linear power amplifier |
The final amplification stage in a multicarrier transmitter that has been designed and optimized to produce a linear response. By operating in the linear mode, the amplifier reduces the non-linear effects that produce intermodulation products and side-lobe spectra that cause adjacent channel interference. |
| LSB |
Least Significant Bit |
In a binary coding scheme, the bit having the least numerical value. Analogous to the units position in a decimal number. |
| lu |
|
Standardized interface between a Radio Network Controller Network and Packet Subsystem (e.g. RNC-3GSGSN). |
| lub |
|
Interface between a Base Station and Radio Network Controller. |
