Improved Beamforming for FSO MISO System over Gamma-Gamma Fading with Pointing Errors

被引：0

作者：

Garg, Ankit ^{[1
]}

Bhatnagar, Manav R. ^{[1
]}

Berder, Olivier ^{[2
]}

Vrigneau, Baptiste ^{[2
]}

机构：

[1] Indian Inst Technol Delhi, Dept Elect Engn, New Delhi 110016, India

[2] Univ Rennes 1, INRIA IRISA, UMR CNRS 6074, 6 Rue Kerampont, F-22300 Lannion, France

来源：

PROCEEDINGS OF THE 2016 INTERNATIONAL CONFERENCE ON ADVANCED TECHNOLOGIES FOR COMMUNICATIONS (ATC) | 2016年

关键词：

SELECTION TRANSMIT DIVERSITY; SPACE OPTICAL COMMUNICATION; TIME BLOCK-CODES; PERFORMANCE ANALYSIS; LASER SELECTION; LINKS; CHANNELS; PROBABILITY; MODULATION;

D O I：

暂无

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

In this paper, we study the problem of feedback based beamforming for multiple-input single-output free space optical (FSO) system with pointing errors. For a 2 x 1 FSO system, it is shown by analysis that any arbitrary beamforming scheme performs poorer than the repetition coding scheme but achieves full diversity over the Gamma-Gamma fading with pointing errors. Then we study a beamforming scheme for 2x1 FSO system which employs one bit feedback from receiver to the transmitter. Erroneous feedback leads to loss in diversity for this beamforming scheme as established by the bit error rate (BER) analysis. For avoiding the loss in diversity, an improved one bit feedback based beamforming scheme is proposed which outperforms the repetition coding. The average BER of this scheme is obtained by using the order statistic and it is minimized to find the optimized transmit weights for the transmit apertures under the erroneous feedback over Gamma-Gamma fading with pointing errors.

引用

页码：362 / 368

页数：7

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