设计了一种新的适合同步光谱幅度编码光码分变址(Spectral-amplitude coding optical code division multiple access, SAC OCDMA)系统 的地址码,能够使多址干扰产生的误码率为0。且该地址码的互相关限为1, 在给定码重和用户 数的情况下能够得到较小码长,便于系统的编解码。利用OptiSys 7.0设计出仿真系统,分析比较用波分复用器和光纤光栅作为编解码器适用的不同系统,在考虑散弹噪声、 相位引起的强度噪声(PIIN)和热噪声的情况下,根据该地址码的特点分析整个编解码系统的信噪比和误码 率,并与现有的SAC地址码性能进行比较。结果表明：选用该地址码的SAC OCDMA系统得到的眼图更为理想,在系统误码率、编解码实现,及系统性能上都有了很大的提高。

A new class of codes was designed for the synchronous spectral-amplitude coding optical code division multiple access (SAC OCDMA) system which the bit error rate (BER) caused by multiple access interference equals 0 and the value of cross-correlation equals 1. When the code weight and number of users were given, the designed codes with shorter code length would be more convenient for the coder. Using OptiSys 7.0 to simulate, the wavelength division multiplexer (WDM) with the fiber Bragger grating (FBG) was analyzed and compared as the codecs in different systems. The signal to noise ratio and bit error rate would be analyzed according to the design of the codes in the consideration of the shot noise, phase induced intensity noise (PIIN) and thermal noise, and would be compared with the existing SAC codes. The result shows that the SAC OCDMA system based on the designed codes has a clearer eye diagram. The performance of bit error rate, codec implementation and system performance was greatly improved.