摘要
介绍了光码分多址系统的基本原理和特性。分别从概率论和信噪比角度分析了OCDMA系统误码率计算公式,并对误码率进行了仿真。分析表明,两种方法得出的误码率接近程度与判决门限有关,且随用户数的增加逐渐接近。得出了误码率与码长、码重、用户数和判决门限的关系。
The fundamental principle and character of OCDMA system were introduced. In term of hitting probability and signal-noise ratio ,we analyzed the system＇s bit error rate （BER）performance and derived some formulas, then we carried on the theory operation to the BER of OCDMA system with Matlab, The results show that the proximity degree of the BER derived by the two ways relate with the decision threshold, and with the increasing in the number of users ,the BER get closer, at the same time ,we found the BER as a function of code length, code weight, number of users and decision threshold.
出处
《光通信技术》
CSCD
北大核心
2008年第7期12-14,共3页
Optical Communication Technology
基金
陕西省自然科学基金项目(2005F09)资助
关键词
光码分多址
误码率
码长
判决门限
OCDMA
the bit error rate
code length
decision threshold
