Question

Implementation of human rights is regarded as matter of changing the conduct of state

Answer 1

Multiple Access Techniques
Multiple access techniques are used to allow a large number of mobile users to share
the allocated spectrum in the most efficient manner. As the spectrum is limited, so
the sharing is required to increase the capacity of cell or over a geographical area
by allowing the available bandwidth to be used at the same time by different users.
And this must be done in a way such that the quality of service doesn’t degrade
within the existing users.
8.1 Multiple Access Techniques for Wireless Communi-
cation
In wireless communication systems it is often desirable to allow the subscriber to
send simultaneously information to the base station while receiving information from
the base station.
A cellular system divides any given area into cells where a mobile unit in each
cell communicates with a base station. The main aim in the cellular system design
is to be able to increase the capacity of the channel i.e. to handle as many calls
as possible in a given bandwidth with a sufficient level of quality of service. There
are several different ways to allow access to the channel. These includes mainly the
following:
1) Frequency division multiple-access (FDMA)
2) Time division multiple-access (TDMA)
3) Code division multiple-access (CDMA