| Chuan-qi Li,Meng-jie Yang,Xiu-rong Zhang,Mei-juan Chen,Dong-dong He,Qing-bin Fan.Construction and performance analysis of variable-weight optical orthogonal codes for asynchronous OCDMA systems[J].Optoelectronics Letters,2014,10(4):290-294 |
| Construction and performance analysis of variable-weight optical orthogonal codes for asynchronous OCDMA systems |
| Author Name | Affiliation | E-mail | | Chuan-qi Li | Electronic Engineering College, Guangxi Normal University, Guilin, 541004, China | lcq@mailbox.gxnu.edu.cn | | Meng-jie Yang | Electronic Engineering College, Guangxi Normal University, Guilin, 541004, China | | | Xiu-rong Zhang | Electronic Engineering College, Guangxi Normal University, Guilin, 541004, China | | | Mei-juan Chen | Electronic Engineering College, Guangxi Normal University, Guilin, 541004, China | | | Dong-dong He | Electronic Engineering College, Guangxi Normal University, Guilin, 541004, China | | | Qing-bin Fan | Electronic Engineering College, Guangxi Normal University, Guilin, 541004, China | |
|
| Abstract: |
| A construction scheme of variable-weight optical orthogonal codes (VW-OOCs) for asynchronous optical code division multiple access (OCDMA) system is proposed. According to the actual situation, the code family can be obtained by programming in Matlab with the given code weight and corresponding capacity. The formula of bit error rate (BER) is derived by taking account of the effects of shot noise, avalanche photodiode (APD) bulk, thermal noise and surface leakage currents. The OCDMA system with the VW-OOCs is designed and improved. The study shows that the VW-OOCs have excellent performance of BER. Despite of coming from the same code family or not, the codes with larger weight have lower BER compared with the other codes in the same conditions. By taking simulation, the conclusion is consistent with the analysis of BER in theory. And the ideal eye diagrams are obtained by the optical hard limiter. |
| Hits: 3576 |
| Download times: 0 |
| This work has been supported by the University Nature Science Fund of Guangxi Province （No.2010 MS018）, and the Guilin Scientific Research and Technological Development Program Topics （No.20120104-18）. |
| View Full Text Download reader |
|
|
|
