Date Added: Jul 2012
All users transmit on the same frequency and time and utilize the entire bandwidth in CDMA compared to TDMA or FDMA. Even though CDMA provides more capacity and better QoS, the capacity is affected by the near-far problem which degrades the performance of users far away from the BSs. It is due to the interference generated within the CDMA system because of the two distinct received powers from the contiguous and distant mobile users. This causes noise and sometimes complete cancellation of signals in most adversary conditions which leads to decrease in CDMA capacity.