CDMA系统中切换性能的界限和变动范围

BOUNDS AND RANGES OF HANDOVER PERFORMANCE IN CDMA

该文提出了CDMA系统中切换性能的3个界限的数学表达式,以及建立在界限基础上的硬切换性能差异、软切换性能差异和软切换增益的变动范围的表达式,并通过这些公式对切换的性能空间做了划分和限定。作为上述分析的数学基础,该文推导了硬切换和软切换中断概率的表达式。最后,通过对WCDMA(FDD)系统的仿真,证明了切换的界限、变动范围和中断概率的公式的正确性,并且指出,使用它们刻划实际切换算法的性能将比Viterbi的估计更为准确和恰当。

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.