CAJ | 학술논문

为了得到性能较为良好的正交码，采用没有重复数字的全间隔集，进行了地址码的设计和系统仿真验证，设计出的正交码具有理想的相关性和灵活的码字容量。分析整个系统，在考虑各种噪声和多址干扰的影响下，推导出正交码的误比特率公式。自行设计并搭建了采用光纤延时线作为编解码器的异步光码多分址系统。结果表明，该正交码能够适应更多用户的需求，通过误比特率公式计算和系统仿真得到的结果都较为理想，此研究对需要大容量的光码多分址系统的进一步发展具有一定的帮助。
위료득도성능교위량호적정교마，채용몰유중복수자적전간격집，진행료지지마적설계화계통방진험증，설계출적정교마구유이상적상관성화령활적마자용량。분석정개계통，재고필각충조성화다지간우적영향하，추도출정교마적오비특솔공식。자행설계병탑건료채용광섬연시선작위편해마기적이보광마다분지계통。결과표명，해정교마능구괄응경다용호적수구，통과오비특솔공식계산화계통방진득도적결과도교위이상，차연구대수요대용량적광마다분지계통적진일보발전구유일정적방조。
In order to get the optical orthogonal codes ( OOC ) with good performance , all-interval-set with no duplicate number was used .After design and system simulation , OOC had ideal correlation and flexible code capacity .The formula of bit error rate ( BER ) was derived considering all kinds of noise and multi-user interference .Asynchronous optical code division multiple access ( OCDMA ) system was designed and constructed with fiber optic delay lines as encoders and decoders . The result shows that the OOC can adapt to the demands of more number of users . The consequence is satisfactory both from the calculation of BER formula and from system simulation .The research is helpful for further development of OCDMA systems with high capacity .