C-8 PN: 10580-00343 Rev. H S820E UG
C-2 Glossary Terms Glossary
dBc : Decibels referenced to the carrier (dBc) is a technique
for expressing a power measurement in logarithmic
form using the carrier power as a reference. The units
are used to describe how far down signals and noise are
relative to a known signal. Typical use of this term is to
describe spurious signals and noise compared to a
desired transmit signal.
dBd : Decibels referenced to a dipole antenna (dBd) is a
technique for expressing a power gain measurement in
logarithmic form using a standard dipole antenna as a
reference. dBd is a measurement of signal gain used in
radio antenna design. Pecifically, dBd referrs to signal
gain in a dipole radiator.
dBm : dBm is an absolute measurement of power relative to 1
milliwatt. In other words, dBm is a decibel value
referenced to a milliWatt (dBm). This is a technique for
expressing a power measurement in logarithmic form
using 1 mW as a reference. dBm is a decibel ratio (log
10) of Watts (W) to one milliwatt (1mW). dBm,
therefore, represents absolute power. Examples are: 0
dBm = 1.0 milliwatt, 10 dBm = 10 milliwatt, 30 dBm =
1000 milliwatt = 1 watt.
DHCP : Dynamic Host Configuration Protocol (DHCP)
DSP : Digital Signal Processing (DSP)
DSRC : Dedicated Short Range Communications (DSRC):
DSRC is a system that is intended for communications
between two vehicles, or from one vehicle to a roadside
network. Efer to IEEE 802.11p.
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