以有效提高宽带码分多址系统容量为目的,通过理论推导的方法,得出传统双速率系统与干扰对消双速率系统的容量极限。并运用MonteCarlo积分,对理论结果进行了数值分析,得到了上述两系统在不同的扩频比、数据速率差异和用户分布范围的情况下的系统容量对比。结果表明,应用差异功率控制的串行干扰对消宽带码分多址系统明显优于传统系统。 For the purpose of effectively increasing the capacity of wideband code division multiple access system, the capacity limit of the traditional dual rate system and interference cancellation double rate system is obtained through the theoretical derivation. Monte Carlo integration was used to analyze the theoretical results numerically. The system capacity comparison of the two systems under different spreading ratio, data rate difference and user distribution range was obtained. The results show that the use of differential power control of the serial interference cancellation wideband code division multiple access system is significantly better than the traditional system.