提出了一种引入光硬件限幅器的光PPM-CDMA (脉位调制-码分多址) 通信系统方案, 即在接收机相关器之前引入一个光硬件限幅器, 以便更好地减少多用户干扰。在系统中存在多用户干扰及接收机散粒噪声的情况下, 推导出该系统误码率上限, 并将该系统特性与无光硬件限幅器的光PPM-CDMA通信系统特性作了比较。结果表明, 引入光硬件限幅器系统的误码特性得到明显的改善 A scheme of optical PPM-CDMA (Pulse-Position Modulation-Code Division Multiple Access) communication system which introduces the optical hardware limiter is proposed, that is, an optical hardware limiter is introduced before the receiver correlator in order to reduce more User interference. In the presence of multi-user interference and receiver shot noise, the system upper error rate is deduced and the system characteristics are compared with those of the bare PPM-CDMA optical communication system. The results show that the introduction of optical hardware limiter system error code has been significantly improved