机构地区: 北京邮电大学电子工程学院光通信与光波技术教育部重点实验室
出 处: 《半导体光电》 2008年第3期399-402,共4页
摘 要: 提出了一种利用模拟退火算法构造任意码长、任意码重(n,w,1)光正交码(SA-OOC)的方法。此方法由三个步骤组成:根据自相关特性筛选可能的码字;去除重复的码字;利用模拟退火算法根据互相关特性组合出一个符合条件的码组。仿真结果表明:该算法具有简单、易于实现的特点;与使用素数码(PC)、扩展的素数码(EPC)、二次同余码(QC)的系统相比,以SA-OOC作为地址码的系统具有更好的误码率特性。SA-OOC有望用于二维光地址码的构造。 Proposed is the construction method of (n,w, 1) optical orthogonal codes (SA-OOC) with any code length and code weight based on simulated annealing algorithms. This method is consisted of three steps: selecting codes by auto-correlation property, eliminating redundant codes, and selecting a codes group according to cross-correlation property using simulated annealing algorithms. The simulation results indicate that this algorithm is simple to implement. The bit error rate of the CDMA system with SA-OOC is better than that of PC, EPC and QC. SA-OOC is perspective for construction of two dimensional optical address codes.