Mobile terminals allow users to access services while on the move. This unique featurernhas driven the rapid growth in the mobile network industry, changing it from a newrntechnology into a massive industry within less than two decades. Handoff is the essentialrnfunctionality for dealing with the mobility of the mobile users. Compared with thernconventional hard handoff employed in the GSM mobile networks, the soft handoff usedrnin IS-95 CDMA and being proposed for 3G has better performance on both link andrnsystem level.rnIn this thesis, an in-depth study of the soft handoff effects on the uplink direction of IS-95rnCDMA networks is carried out, leading to optimize soft handoff for capacity underrnperfect power control approach.rnWe analyze the performance of different handoff algorithms on the forward link orrndownlink of a CDMA cellular system. Unlike the reverse link, soft handoffs on thernforward link requires additional resources such as CDMA codes and transmit power andrnalso causes additional interference. If handoff requests can be processed and completedrninstantaneously, transmission from the base station with the best link to the user wouldrnachieve a significant fraction of the macro diversity gain without utilizing additionalrnresources. However, in practical systems, there is a nonzero handoff completion delayrnand soft handoff provides the required robustness to delays, although it comes at thernexpense of additional network resources. Thus, there is a tradeoff between the extent ofrnsoft handoff required and the handoff execution delay. We present an analyticalrnframework to study this tradeoff and also discuss simulation results simulated with thernhelp of Matlab. For this, handoff dropping probability is minimized up to 0.1%.rnMarkov concept is applied to describe the systemâ€™s statistic behavior in steady state.rnSystem performances such as blocking and dropping probabilities and channel efficiencyrnare also determined