Abstract
Atmospheric turbulence (AT) severely cuts down the image resolutions
of holographic ghost imaging (HGI) since orbital angular momentum (OAM) entangled
states are associated with the spatial distribution of wave-functions. In
this paper, we investigate the method to improve AT tolerance in HGI system.
Since Reed-Solomon (RS) codes are important non-binary error correction codes
which have strong correcting ability against noise, we use RS codes to develop
a RS-coded HGI scheme. In order to verify the improvement quantitatively,
we compute and compare the Peak Signal-to-Noise ratio (PSNR) of the reconstructed
image in HGI without and with RS codes. The numerical results show that PSNRs
go down quickly with the increase of the strength of turbulence, and they
are improved greatly by using RS codes. For different grayscale objects, the
results show that the improvement by RS codes is enhanced with the increasing
correction ability, but it does not work for the same object by enlarging
its grayscale to suit for more errors.
© 2013 IEEE
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