Research on CRC-LT coding performance in free space optical communication

Cao Yang; Ren Fatao; Peng Xiaofeng; Zhang Xun; Chen Guo

doi:10.3788/IRLA201847.1122003

Luby transform (LT) code is a rateless linear code, which has good channel adaptability and low complexity. A concatenated coding scheme of CRC code and LT code (CRC-LT code) was proposed to ensure the reliability of FSO system and improve the coding gain of LT code in FSO system by adjusting overhead. A new analytic model was developed to derive the data restoration probability with given conditions of channel. Finally, simulation experiments were performed over Gamma-Gamma channel model, and the relationships among data restoration probability, channel condition, SNR and overhead were given. The results show that CRC-LT code has better coding gain and can effectively enhance the reliability of the FSO system by increasing overhead.

Research on CRC-LT coding performance in free space optical communication

1. School of Electrical and Electronic Engineering,Chongqing University of Technology,Chongqing 400054,China

Received Date: 2018-06-05

Rev Recd Date: 2018-07-03

Publish Date: 2018-11-25

Key words:

Abstract: Luby transform (LT) code is a rateless linear code, which has good channel adaptability and low complexity. A concatenated coding scheme of CRC code and LT code (CRC-LT code) was proposed to ensure the reliability of FSO system and improve the coding gain of LT code in FSO system by adjusting overhead. A new analytic model was developed to derive the data restoration probability with given conditions of channel. Finally, simulation experiments were performed over Gamma-Gamma channel model, and the relationships among data restoration probability, channel condition, SNR and overhead were given. The results show that CRC-LT code has better coding gain and can effectively enhance the reliability of the FSO system by increasing overhead.

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Research on CRC-LT coding performance in free space optical communication

doi: 10.3788/IRLA201847.1122003

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