- published: 02 May 2013
- views: 58433
Code division multiple access (CDMA) is a channel access method used by various radio communication technologies. It should not be confused with the mobile phone standards called cdmaOne, CDMA2000 (the 3G evolution of cdmaOne) and WCDMA (the 3G standard used by GSM carriers), which are often referred to as simply CDMA, and use CDMA as an underlying channel access method.
One of the concepts in data communication is the idea of allowing several transmitters to send information simultaneously over a single communication channel. This allows several users to share a band of frequencies (see bandwidth). This concept is called multiple access. CDMA employs spread-spectrum technology and a special coding scheme (where each transmitter is assigned a code) to allow multiple users to be multiplexed over the same physical channel. By contrast, time division multiple access (TDMA) divides access by time, while frequency-division multiple access (FDMA) divides it by frequency. CDMA is a form of spread-spectrum signalling, since the modulated coded signal has a much higher data bandwidth than the data being communicated.
I'm so excited
we'll surely make it to the top
with music that we make
I'm so delighted
can't wait to read you're loving it
that's how it's got to be
then a slap in the face
you took it apart
I think I might break down and cry
I feel so defeated
in your eyes
I see my demise
the anchor you cast
and now I'm going down
dig a grave for me please
they're preying on me
don't ask me to approve of that
don't think I will consent
they want to destroy me
go ahead and try
do your best
you're always right
again a slap in the face
you took it apart
I think I might break down and cry
I feel so defeated
in your eyes
I see my demise
the anchor you cast
and now I'm going down
dig a grave for me please
the only thing I want to say
is that we're strong together
and I don't care what you claim
it must be whiteout in your brain
and you can't see clearly