Date Added: Dec 2012
CDMA is interference limited system hence the capacity of the system is limited by interference as number of users' increases. This problem occurs when many mobile users share the same channel. CDMA takes the advantage of multipath fading .This system is resistant to multipath fading & also use the delayed multipath components to improve the performance of the system. This can be done using RAKE receiver in which multipath propagation delays of the transmitted signals are considered and combines the information obtained from several resolvable multipath components to form a stronger version of the signal using Rake receiver. To overcome the problem of fading in channel Rake receiver can be used against mismatch & modeling errors which enhance its interference cancellation capability.