Effect of imperfect slot synchronization on bit errors of MPPM in underwater laser communication
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1.
Information & Communication College, Guilin University of Electronic Technology, Guilin 541004, China;
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2.
Institute ofTechnoolgy, Yichun University, Yichun 336000, China
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Corresponding author:
CHEN Ming-song, cms@guet.edu.cn
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Received Date:
2008-08-08
Accepted Date:
2008-09-23
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Abstract
Multi-pulse position modulation (MPPM) is more effective than pulse position modulation (PPM) in underwater laser communication due to its advantages of high efficiency and low bandwidth.In order to study the effect of imperfect slot synchronization on bit error of MPPM in underwater laser communication,a method of MPPM map table with the smallest bit error rate was put forward after analyzing MPPM performance with imperfect slot synchronization performance is analyzed.Bit error rate of MPPM based on binary code was compared with that based on Gray code by means of simulation.The result showed that bit error rate of Gray code was lower than that of binary code at the same bandwidth and transmit rate with the bit error rate declined about 2.4dB.The obtained results are theoretic reference to the improvement of the performance of underwater laser communication.
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