| Chuan-qi Li,Meng-jie Yang,De-jun Luo,Ye Lu,Yi-pu Kong,Dong-chuang Zhang.Construction and performance research on variable-length codes for multirate OCDMA multimedia networks[J].Optoelectronics Letters,2014,10(5):360-364 |
| Construction and performance research on variable-length codes for multirate OCDMA multimedia networks |
| Author Name | Affiliation | E-mail | | Chuan-qi Li | College of Electronic Engineering, Guangxi Normal University, Guilin, 541004, China | lcq@mailbox.gxnu.edu.cn | | Meng-jie Yang | College of Electronic Engineering, Guangxi Normal University, Guilin, 541004, China | | | De-jun Luo | College of Electronic Engineering, Guangxi Normal University, Guilin, 541004, China | | | Ye Lu | College of Electronic Engineering, Guangxi Normal University, Guilin, 541004, China | | | Yi-pu Kong | College of Electronic Engineering, Guangxi Normal University, Guilin, 541004, China | | | Dong-chuang Zhang | College of Electronic Engineering, Guangxi Normal University, Guilin, 541004, China | |
|
| Abstract: |
| A new kind of variable-length codes with good correlation properties for the multirate asynchronous optical code division multiple access (OCDMA) multimedia networks is proposed, called non-repetition interval (NRI) codes. The NRI codes can be constructed by structuring the interval-sets with no repetition, and the code length depends on the number of users and the code weight. According to the structural characteristics of NRI codes, the formula of bit error rate (BER) is derived. Compared with other variable-length codes, the NRI codes have lower BER. A multirate OCDMA multimedia simulation system is designed and built, the longer codes are assigned to the users who need slow speed, while the shorter codes are assigned to the users who need high speed. It can be obtained by analyzing the eye diagram that the user with slower speed has lower BER, and the conclusion is the same as the actual demand in multimedia data transport. |
| Hits: 3752 |
| 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 |
|
|
|
