PRECODING FOR UNDERWATER OPTICAL LIGHT MIMO SYSTEM BASED ON LATTICE REDUCTION
Aimed at the problem that the great spatial correlation between sub-channels of the underwater visible light MIMO system,a precoding algorithm based on lattice reduction is proposed.By transforming the MMSE detection operation at the receiving end into the precoding at the transmitter,the problem of noise amplifying of the traditional optical MIMO linear detection algorithm was solved,and the channel matrix with better orthogonality after the lattice reduction was used to obtain the precoding matrix,which reduced correlation between sub-channels of optical MIMO system.The simulation results show that,at the BER of 10-4,compared with the traditional optical MIMO detection algorithm,the system using the lattice reduction precoding algorithm obtains an SNR gain of 5 dB.
Underwater optical communicationImaging MIMO systemLattice reductionPrecoding
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