Low SNR Capacity of FSO Links over Gamma-Gamma Atmospheric Turbulence Channels

被引：35

作者：

Benkhelifa, Fatma ^{[1
]}

Rezki, Zouheir ^{[1
]}

Alouini, Mohamed-Slim ^{[1
]}

机构：

[1] KAUST, Comp Elect & Math Sci & Engn CEMSE Div, Thuwal, Makkah Province, Saudi Arabia

来源：

IEEE COMMUNICATIONS LETTERS | 2013年 / 17卷 / 06期

关键词：

FSO; Gamma-Gamma distribution; ergodic capacity; water filling; On-Off power control; low SNR; SPACE OPTICAL CHANNELS; FADING CHANNELS;

D O I：

10.1109/LCOMM.2013.043013.130119

中图分类号：

TN [电子技术、通信技术];

学科分类号：

0809 ;

摘要：

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 S NR log(4)(1/S NR). We show also that one-bit CSI feedback at the transmitter is enough to achieve this capacity using an on-off power control scheme.

引用

页码：1264 / 1267

页数：4

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