分析了一种混合WDMA OCDMA系统的性能,该系统将可用带宽划分成两部分,一部分用于OCDMA用户,另一部分用于WDMA用户。当可用带宽在WDMA与OCDMA之间不同的分配情况下,研究了该混合系统的总用户数和频谱效率。分析结果表明,在要求的误比特率条件下,随着OCDMA系统占用波长信道数目的增加,WDMA OCDMA混合系统的总用户数将增加,而系统的频谱效率将急剧下降。 Analyzes the performance of a hybrid WDMA OCDMA system that divides the available bandwidth into two parts, one for OCDMA users and the other for WDMA users. When available bandwidth varies between WDMA and OCDMA, the total number of users and the spectral efficiency of the hybrid system are studied. The analysis results show that the total number of users in the WDMA OCDMA hybrid system will increase and the spectral efficiency of the system will drop sharply with the increase of the number of occupied wavelength channels of the OCDMA system under the required bit error rate.