Product Info

DWM1001C Datasheet
© Decawave Ltd 2017 Subject to change without notice Version 1.40C Page 26
11 G
LOSSARY
Table 12: Glossary of Terms
Abbreviation Full Title Explanation
EIRP
Equivalent
Isotropically
Radiated Power
The amount of power that a theoretical isotropic antenna (which evenly distributes
power in all directions) would emit to produce the peak power density observed in the
direction of maximum gain of the antenna being used
ETSI
European
Telecommunication
Standards Institute
Regulatory body in the EU charged with the management of the radio spectrum and
the setting of regulations for devices that use it
FCC
Federal
Communications
Commission
Regulatory body in the USA charged with the management of the radio spectrum and
the setting of regulations for devices that use it
GPIO
General Purpose
Input / Output
Pin of an IC that can be configured as an input or output under software control and
has no specifically identified function
IEEE
Institute of Electrical
and Electronic
Engineers
Is the world’s largest technical professional society. It is designed to serve
professionals involved in all aspects of the electrical, electronic and computing fields
and related areas of science and technology
LIFS
Long Inter-Frame
Spacing
Defined in the context of the IEEE 802.15.4-2011 [7] standard
LNA Low Noise Amplifier
Circuit normally found at the front-end of a radio receiver designed to amplify very low
level signals while keeping any added noise to as low a level as possible
LOS Line of Sight
Physical radio channel configuration in which there is a direct line of sight between
the transmitter and the receiver
NLOS Non Line of Sight
Physical radio channel configuration in which there is no direct line of sight between
the transmitter and the receiver
PGA
Programmable Gain
Amplifier
Amplifier whose gain can be set / changed via a control mechanism usually by
changing register values
PLL Phase Locked Loop
Circuit designed to generate a signal at a particular frequency whose phase is related
to an incoming “reference” signal.
PPM Parts Per Million
Used to quantify very small relative proportions. Just as 1% is one out of a hundred,
1 ppm is one part in a million
RF Radio Frequency
Generally used to refer to signals in the range of 3 kHz to 300 GHz. In the context of
a radio receiver, the term is generally used to refer to circuits in a receiver before
down-conversion takes place and in a transmitter after up-conversion takes place
RTLS
Real Time Location
System
System intended to provide information on the location of various items in real-time.
SFD
Start of Frame
Delimiter
Defined in the context of the IEEE 802.15.4-2011 [7] standard.
SPI
Serial Peripheral
Interface
An industry standard method for interfacing between IC’s using a synchronous serial
scheme first introduced by Motorola
TCXO
Temperature
Controlled Crystal
Oscillator
A crystal oscillator whose output frequency is very accurately maintained at its
specified value over its specified temperature range of operation.
TWR Two Way Ranging
Method of measuring the physical distance between two radio units by exchanging
messages between the units and noting the times of transmission and reception.
Refer to Decawave’s website for further information
TDOA
Time Difference of
Arrival
Method of deriving information on the location of a transmitter. The time of arrival of a
transmission at two physically different locations whose clocks are synchronized is
noted and the difference in the arrival times provides information on the location of
the transmitter. A number of such TDOA measurements at different locations can be
used to uniquely determine the position of the transmitter. Refer to Decawave’s
website for further information.
UWB Ultra Wideband A radio scheme employing channel bandwidths of, or in excess of, 500MHz
WSN
Wireless Sensor
Network
A network of wireless nodes intended to enable the monitoring and control of the
physical environment
BLE
Bluetooth Low
Energy.
A low power means of data communication.