Abstract
We analyze the performance of the atmospheric optical subcarrier multiplexing (AO-SCM) systems and the atmospheric optical code division multiplexing (AO-CDM) systems. We derive the average received carrier-to-interference-plus-noise ratio (CINR) of the AO-SCM systems and the AO-CDM systems on a turbulence channel with the scintillation and the nonlinearity of an LD. We show that the received CINR of the AO-CDM systems is larger than that of the AO-SCM systems when the number of channels is small for the same optical modulation index (OMI), and vice versa when the number of channels is large for the same OMI. For instance, when the logarithm variance of scintillation σX2 is 0.3, a constant of the nonlinearity of an LD a3 is 0.17, and the number of channels K is 4, the maximum CINR of the AO-CDM systems is about 4 dB better than that of the AO-SCM systems. Also, when K is 16, the maximum CINR of the AO-SCM systems is about 3 dB better than that of the AO-CDM systems. The difference of CINR results in the difference of the maximum achievable number of channels for the systems. When the required BER is 10-9, AO-SCM and AO-CDM systems can accomodate 16 and 8 BPSK channels, respectively.
| Original language | English |
|---|---|
| Pages (from-to) | 3336-3340 |
| Number of pages | 5 |
| Journal | IEEE International Conference on Communications |
| Volume | 6 |
| Publication status | Published - 2004 Aug 30 |
| Externally published | Yes |
| Event | 2004 IEEE International Conference on Communications - Paris, France Duration: 2004 Jun 20 → 2004 Jun 24 |
ASJC Scopus subject areas
- Computer Networks and Communications
- Electrical and Electronic Engineering