Abstract
In this paper, we study the ergodic capacity of free space optical communication systems over Gamma-Gamma atmospheric turbulence fading channels with perfect channel state information at both the transmitter and the receiver. In our framework, we mainly focus on the low signal-to-noise ratio range and show that the ergodic capacity scales proportionally to SNR log 4 (1/SNR). We show also that one-bit CSI feedback at the transmitter is enough to achieve this capacity using an on-off power control scheme.
| Original language | English |
|---|---|
| Pages (from-to) | 1264-1267 |
| Number of pages | 4 |
| Journal | IEEE Communications Letters |
| Volume | 17 |
| Issue number | 6 |
| DOIs | |
| Publication status | Published - 13 May 2013 |
| Externally published | Yes |
Keywords
- Signal to noise ratio
- Optical transmitters
- Optical receivers
- Optical feedback
- Radio frequency
- Fading