Near far effect ?
Answer;- All users use the same
bandwidth at the same time and therefore users interfere with one another. Due
to the propagation path loss, the signal received by the base station from a UE
close to the base station will be stronger than the Signal received from
another terminal located at the boundary. Hence, the distant user will be dominated
by the close user. This is called the near-far effect. To achieve a considerable
capacity, all signals, irrespective of distance, should arrive at the base station
with the same mean power. A solution to this problem is power control, which
attempts to achieve the same mean received power for each user.