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Proceedings Paper

Design and realization of FEC-based RS code in the atmospheric laser communication system
Author(s): Limin Chang; Lu Song; Lijing Zhang
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Paper Abstract

The RS(Reed-Solomon) code is an important linear block and used for solving the problem of serious distortion and BER(Bit Error Rate) in the atmospheric laser communication system. RS (255,223) code are selected as channel code. Meanwhile, technologies for the laser communication system such as encode, interleaving, decode have been discussed in details. In this paper, an improved RiBM algorithm is adopted in the key equations solver of decoding algorithm. In the Forney's algorithm, inversion circuit in finite field is adopted. Then, division operation in the error value is realization by subtraction of power exponent. As a result, the whole decoding chip obtains the optimization in the speed and the usage resources. The hardware structure design and algorithms program have been finished on FPGA according to CCSDS specification. The BER performance verification has been applied in Visual C language. The experiment results show that coded data can obtain SNR (Signal-to-Noise Ratio) gain of 3-5dB when BER requirement of 10-5 is satisfied in this system.

Paper Details

Date Published: 3 February 2009
PDF: 7 pages
Proc. SPIE 7160, 2008 International Conference on Optical Instruments and Technology: Optoelectronic Measurement Technology and Applications, 716038 (3 February 2009); doi: 10.1117/12.817414
Show Author Affiliations
Limin Chang, Air Force Aviation Univ. (China)
Lu Song, Changchun Univ. of Science & Technology (China)
Lijing Zhang, Air Force Aviation Univ. (China)


Published in SPIE Proceedings Vol. 7160:
2008 International Conference on Optical Instruments and Technology: Optoelectronic Measurement Technology and Applications
Shenghua Ye; Guangjun Zhang; Jun Ni, Editor(s)

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