Abstract
Optical code division multiple access (OCDMA) shows limitations in terms of the inefficient bandwidth utilization and low spectral density with one-dimensional (1D) codes. To overcome these limitations, a novel design is presented using a two dimensional (2D) spectral/spatial multiwavelength coding scheme. The proposed code is constructed using a 1D balanced incomplete block design (BIBD) technique. Theoretical and analytical results indicate that the proposed code provided improvement in the number of simultaneous users, code construction, and cross-correlation and minimized noise. Moreover, the bandwidth requirements can be minimized, and it can provide flexibility in addressing code sequences. Finally, results were compared with existing spectral-spatial 2D codes such as diagonal eigenvalue unity (DEU) and 2D diluted perfect difference (DPD). It was observed that the 2D-BIBD code fulfilled optical transmission needs with minimum effective source power (Psr = -27.5 dBm) when compared to 2D-DEU (-26.5 dBm) and 2D-DPD (-25.5 dBm) codes. Overall, our results suggested that the performance of BER for the proposed code was 72% and 22% higher than the existing 2D-DPD and 2D-DEU codes, respectively.
| Original language | English |
|---|---|
| Article number | 783 |
| Pages (from-to) | 1-24 |
| Number of pages | 24 |
| Journal | Applied Sciences (Switzerland) |
| Volume | 11 |
| Issue number | 2 |
| DOIs | |
| State | Published - 2 Jan 2021 |
Keywords
- Balanced incomplete block design
- Cardinality
- OCDMA
- Phase induced intensity noise (PIIN)
- Spectral efficiency
- Spectral/spatial