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MC－CDMA称为多载波码分多址（或码分多址），实际上是将OFDM调制应用于DS－CDMA系统，将DS－CDMA与OFDM的优点结合在一起的一种混合技术。就这一新技术，通过OFDM应用于DS－CDMA系统的原因分析，给出MC－CDMA系统的模型，说明MC－CDMA具有抗时间弥散信道的良好特性。
MC-CDMA is called multi-carrier code division multiple access (or code division multiple access) and is actually a hybrid technology that applies OFDM modulation to a DS-CDMA system and combines the advantages of DS-CDMA and OFDM. With this new technology, the model of MC-CDMA system is given through the analysis of the reason why OFDM is applied to DS-CDMA system, which shows that MC-CDMA has the good characteristics of anti-time dispersive channel.