Abstract
In information of communication by means of laser, quantum communication theory describing the quantum effect has been needed instead of conventional Shannon's theory. In this paper, (1) we briefly review the mathematical formulation of quantum communication theory and (2) consider the efficiency of modulations (ASK(OOK), FSK, PSK, PPM) with coherent state by using the Ohya's mutual entropy.
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© 1991 Springer-Verlag
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Watanabe, N. (1991). Efficiency of optical modulations with coherent state. In: Bendjaballah, C., Hirota, O., Reynaud, S. (eds) Quantum Aspects of Optical Communications. Lecture Notes in Physics, vol 378. Springer, Berlin, Heidelberg. https://doi.org/10.1007/3-540-53862-3_196
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DOI: https://doi.org/10.1007/3-540-53862-3_196
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