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同步CDMA（S-CDMA）解决了双向HFC系统的上行信道噪声和容量问题，基于S-CDMA的HFC是新一代HFC系统。从系统实现的角度来看，非理想功率控制会明显降低系统业务容量。本文简单介绍了S-CDMA-HFC系统模型和上行信道概况，分析了非理想功率控制对S-CDMA-HFC系统上行信道Erlang容量的影响，并给出了数值结果与结论。
Synchronous CDMA (S-CDMA) solves the problem of uplink channel noise and capacity in bidirectional HFC systems, and HFC based on S-CDMA is a new generation of HFC system. From a system implementation point of view, non-ideal power control will significantly reduce the system business capacity. In this paper, the S-CDMA-HFC system model and the uplink channel profile are introduced briefly. The influence of the non-ideal power control on the Erlang capacity of the uplink channel in S-CDMA-HFC system is analyzed and the numerical results and conclusions are given.