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A novel scheme for the utilization of optically preamplified (EDFA) PPM receivers in intersatellite laser communications is proposed. Instead of employing a photon counting strategy, we have considered a threshold detection system. Using our model with conservative parameters, we have demonstrated potential receiver sensitivities of 40 photons/bit. This compares well with other results in the field and indicates the great potential of this receiver formation for use in satellite communications.
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Cryan et al. (1994) studied this question.
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