Due to Adjacent Channel Interference (ACI) which is caused due to imperfect filters, nearby frequencies leak into the passband of the receiver. This problem can be particularly serious if a large number of channel users are transmitting in a very close to a subscriber receiver. This situation is referred to as Near-Far effect where a nearby TRANSMITTER CAPTURES the receiver of the subscriber and happens in the CASE of CDMA in which multiple users operate on the same FREQUENCY with different orthogonal codes. Any error in assigning the codes to the users can cause this problem.

Due to Adjacent Channel Interference (ACI) which is caused due to imperfect filters, nearby frequencies leak into the passband of the receiver. This problem can be particularly serious if a large number of channel users are transmitting in a very close to a subscriber receiver. This situation is referred to as Near-Far effect where a nearby transmitter captures the receiver of the subscriber and happens in the case of CDMA in which multiple users operate on the same frequency with different orthogonal codes. Any error in assigning the codes to the users can cause this problem.