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SUN Li-hua, CHEN Ming-song, LI Tian-song, YI Miao. Study about LDPC codes applied in underwater laser communication[J]. LASER TECHNOLOGY, 2009, 33(6): 604-606. DOI: 10.3969/j.issn.1001-3806.2009.06.013
Citation: SUN Li-hua, CHEN Ming-song, LI Tian-song, YI Miao. Study about LDPC codes applied in underwater laser communication[J]. LASER TECHNOLOGY, 2009, 33(6): 604-606. DOI: 10.3969/j.issn.1001-3806.2009.06.013

Study about LDPC codes applied in underwater laser communication

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  • Received Date: August 25, 2008
  • Revised Date: October 27, 2008
  • Published Date: December 24, 2009
  • In order to study the performance of low density parity check (LDPC) codes applied in an underwater laser communication system,its bit error rate was simulated by means of soft-decision decoding algorithm.A model of underwater laser communication channel was introduced,and then the encoding and decoding algorithm of LDPC codes was studied.For a certain code length and modulation order,the bit error rate can be reduced to 10-5 with the signal photon number ns increase.The simulation results show that the bit error rate of the system can be improved obviously by means of LDPC soft-decision decoding based on the output soft information of the photo detector.
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