Why is the near-far problem present in CDMA and not in FDMA?
What will be an ideal response?
CDMA requires tight power control as it suffers from near-far effect. In other
words, a user close to the base station transmitting with the same power as a
user farther away will drown the latter’s signal. All signals must have more or
less equal power at the receiver. While in FDMA all to-gather different
frequencies are used, this problem does not exist. The signals with different frequencies cannot affect each other signals as the signals are distinct, which is
not the case in CDMA where the same frequency is used to transmit 2 calls,
each with a different code.
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