Abstract:This paper presents the expressions of three bounds and three ranges on handover performance in CDMA system, and divides the space of handover performance into several parts according to the six expressions. In order to form the basis of the above expressions, this paper then proposes the methods to deduce the outage probability of hard and soft handovers. By simulating the WCDMA(FDD) system, the expressions are proved to be right and it is also concluded that they are more accurate and appropriate to describe the handover performance in a real CDMA system than Viterbi’s.